WR 134 or Dolphin

 

Telescope : SW Esprit 100ED

Mount : SW Wave 150i

Camera : ZWO 533mc

Guiding :Zwo 120mono with Touptek oag

Filters:   Total exposure time :18 hours & 20 minutes from 5 nights with SVBONY 220 7nm 2"

Programs I have used : ZWO AsiAir & PixInsight 1.9.4

WR 134 is a variable Wolf-Rayet star located around 6,000 light years away from Earth in the constellation of Cygnus, surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is five times the radius of the sun, but due to a temperature over 63,000 K it is 400,000 times as luminous as the Sun.

WR 134 was one of three stars in Cygnus observed in 1867 to have unusual spectra consisting of intense emission lines rather than the more normal continuum and absorption lines. These were the first members of the class of stars that came to be called Wolf-Rayet stars (WR stars) after Charles Wolf and Georges Rayet who discovered their unusual appearance.[8] It is a member of the nitrogen sequence of WR stars, while the other two (WR 135 and WR 137) are both members of the carbon sequence that also have OB companions. WR 134 has a spectrum with NIII and NIV emission between two and five times stronger than NV, leading to the assignment of a WN6 spectral type. The spectrum also shows strong HeII emission and weaker lines of HeI and CIV.

The Medusa Nebula & NGC 2395

Telescope : SW Esprit 100ED

Mount : SW Wave 150i

Camera : ZWO 533mc

Guiding :Zwo 120mono with Touptek oag

Filters:   Total exposure time :8hours & 25minutes with SVBONY 220 7nm 2"

Programs I have used : ZWO AsiAir & PixInsight 1.9.3

From 2 night's 18/2/26, 19/2/26

 

The Medusa Nebula (Abell 21) is an ancient planetary nebula located roughly 1,500 light-years away in the Gemini constellation. Often paired in wide-field astrophotography with the nearby open cluster NGC 2395 (located about

away), the nebula spans over 4 light-years, showcasing, filaments of gas, and a hot, central, bluish star. 

Key Details about the Pair:

• Medusa Nebula (Abell 21/Sh2-274): A large, old planetary nebula, it gets its name from filaments resembling snakes. Its shape is often likened to a crescent or jellyfish, featuring emission from ionized gases (OIII and Ha).
• NGC 2395: A loose open cluster of stars situated near the Medusa Nebula, often included in the same field of view for astrophotography.
• Location: Situated in the constellation Gemini, making it a popular winter target for observing and imaging. 

The Medusa Nebula is known for being quite faint, requiring long exposure times or large apertures to observe its detailed structure, which is often enhanced by the nearby backdrop of NGC 2395. 

IC 443 Jellyfish (SV220)

 

Telescope : SW Esprit 100ED

Mount : SW Wave 150i

Camera : ZWO 533mc

Guiding :Zwo 120mono with Touptek oag

Filters:   Total exposure time :8hours & 5minutes with SVBONY 220 7nm 2"

Programs I have used : ZWO AsiAir & PixInsight 1.9.3

From 2 night's 06/02/2025 and  13/02/2026

 

IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a galactic supernova remnant (SNR) in the constellation Gemini. On the plane of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.

IC 443 may be the remains of a supernova that occurred 30,000 - 35,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.

IC 63 The Ghost of Cassiopeia

 

  

Telescope : SW Esprit 100ED

Mount : SW Wave 150i

Camera : ZWO 533mc

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time :8hours & 12minutes with SV260 2"

Programs I have used : Nina 3.0 _ PixInsight 1.8.9-3

 

Το IC 63, γνωστό ως το «Φάντασμα της Κασσιόπης», είναι ένα αινιγματικό νεφέλωμα 550 έτη φωτός μακριά στον αστερισμό Κασσιόπης, που «σμιλεύεται» από την ισχυρή ακτινοβολία και τους αστρικούς ανέμους του κοντινού μπλε γίγαντα άστρου ⋌ Cassiopeiae, λειτουργώντας ταυτόχρονα ως νεφέλωμα εκπομπής (λόγω υδρογόνου) και ανάκλασης (λόγω σκόνης), με την όψη του να θυμίζει φάντασμα λόγω της αλληλεπίδρασης του φωτός του άστρου

. 

Βασικά Χαρακτηριστικά

 

Όνομα: IC 63, "Το Φάντασμα της Κασσιόπης" (The Ghost of Cassiopeia).

Απόσταση: Περίπου 550 έτη φωτός από τη Γη.

Τοποθεσία: Στον αστερισμό της Κασσιόπης.

Σχέση με ⋌ Cassiopeiae: Η μορφή του διαμορφώνεται από την έντονη υπεριώδη ακτινοβολία και τους αστρικούς ανέμους του άστρου ⋌ Cassiopeiae (η «Δέσποινα» της Κασσιόπης)

Τύπος Νεφελώματος: Είναι ταυτόχρονα νεφέλωμα εκπομπής (εκπέμπει φως υδρογόνου-άλφα) και νεφέλωμα ανάκλασης (ανακλά φως από το άστρο)

 

Εξήγηση της Εμφάνισης

• Η υπεριώδης ακτινοβολία από το ⋌ Cassiopeiae ιονίζει το υδρογόνο στο νεφέλωμα, κάνοντάς το να λάμπει κόκκινο.
• Η σκόνη στο νεφέλωμα ανακλά το μπλε φως του άστρου, προσδίδοντας μια γαλάζια απόχρωση, και δημιουργεί τις «φαντασμαγορικές» ροές αερίου και σκόνης.
• Οι ισχυροί αστρικοί άνεμοι από το ⋌ Cassiopeiae διαβρώνουν αργά το νεφέλωμα, και εκτιμάται ότι θα διαλυθεί εντελώς σε περίπου μισό εκατομμύριο χρόνια. 

 

 

Rosette Nebula(NGC 2244)

 

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time :290minutes with L-Enhance & ir-cut filter

Programs I have used : Nina 3.0 _ PixInsight 1.8.9-3

The Rosette Nebula is a vast emission nebula located about 5,200 light years away. The star forming region lies near a large molecular cloud in the constellation of Monoceros, the Unicorn. It is closely associated with the young open star cluster NGC 2244.

Also known as the Satellite Cluster, NGC 2244 appears at the centre of the Rosette. The hot young stars of the cluster were formed from the nebula’s material in the last 5 million years.

The stars in the Satellite Cluster are responsible for the nebula’s glow. Their radiation ionizes the surrounding clouds of nebulosity, causing them to emit their own light. The nebula glows in the red part of the spectrum because the powerful ultraviolet radiation from the stars strips electrons from the nebula’s hydrogen atoms.

The Rosette Nebula is a very active stellar nursery. It is home to numerous Herbig-Haro objects and Herbig Ae/Be stars, Bok globules, T Tauri stars and clusters of newly formed stars. The dark filaments of dust extending toward the centre of the nebula, sometimes called “elephant trunks,” are shaped by the stellar winds and radiation from hot young stars and electromagnetic forces.

IC 1805 in SHO(Heart nebula)

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time :6 hours (72x300sec) with L-enchance 1.25

Programs I have used : Nina 3.0 _ PixInsight 1.8.9-3

The Heart Nebula (also known as the Running Dog Nebula, Sharpless 2-190) is an emission nebula, 7500 light years away from Earth and located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. It displays glowing ionized hydrogen gas and darker dust lanes.

The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Collinder 26, Melotte 15, or IC 1805, contains a few bright stars nearly 50 times the mass of the Sun, and many more dim stars that are only a fraction of the Sun's mass.

The Heart Nebula is also made up of ionised oxygen and sulfur gasses, responsible for the rich blue and orange colours seen in narrowband images. The shape of the nebula is driven by stellar winds from the hot stars in its core. The nebula also spans almost 2 degrees in the sky, covering an area four times that of the diameter of the full moon.

IC 5070 Pelican nebula -Hubble palette-

This is the RGB version from 533mc pro

 

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time :5 hours (60x300sec) with L-enchance 1.25

Programs I have used : Nina 3.0 _ PixInsight 1.8.9-3

 

The Pelican Nebula (also known as IC 5070 and IC 5067) is an H II region associated with the North America Nebula in the constellation Cygnus. The gaseous contortions of this emission nebula bear a resemblance to a pelican, giving rise to its name.The Pelican Nebula is located nearby first magnitude star Deneb, and is divided from its more prominent neighbour, the North America Nebula, by a foreground molecular cloud filled with dark dust. Both are part of the larger H II region of Westerhout 40.

The Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming cold gas to hot and causing an ionization front gradually to advance outward. Particularly dense filaments of cold gas are seen to still remain, and among these are found two jets emitted from the Herbig–Haro object 555. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will leave something that appears completely different.

The Cygnus Wall of the North America Nebula(Hubble palette)

Update : 2 new versions

This is the narrowband version_2

This is the RGB version

This is the bicolor version

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time :4:05 hours (49x300sec)

Programs I have used : Nina 3.0 _ PixInsight 1.8.9-3

Location: Grammatiko, Attiki 

The North America Nebula covers a region more than ten times the area of the full moon, but its surface brightness is low, so normally it cannot be seen with the unaided eye. Binoculars and telescopes with large fields of view (approximately 3°) will show it as a foggy patch of light under sufficiently dark skies. However, using a UHC filter, which filters out some unwanted wavelengths of light, it can be seen without magnification under dark skies. Its shape and reddish color (from the hydrogen Hα emission line) show up only in photographs of the area.

The portion of the nebula resembling Mexico and Central America is known as the Cygnus Wall. This region exhibits the most concentrated star formation.

The Cocoon Nebula(IC 5146)

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time :8hours & 3min(161*180") from 2 nights

Programs I have used : Nina 3.0 _ PixInsight 1.8.9-3

Location: Grammatiko, Attiki 

IC 5146 (also Caldwell 19, Sh 2-125, Barnard 168, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula. The cluster is also known as Collinder 470.

 It shines at magnitude +10.0/+9.3/+7.2. Its celestial coordinates are RA 21^h 53.5^m , dec +47° 16′. It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open cluster M39. The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years.

When viewing IC 5146, dark nebula Barnard 168 (B168) is an inseparable part of the experience, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.

 

Cygnus Star Cloud(Tulip Nebula or Sh2-101)

 

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time : 5 hours and 35 minutes (31-05-2024)

Programs I have used : Nina 2.3 _ PixInsight 1.8.9-2

Location: Grammatiko, Attiki

Sharpless 101 (Sh2-101) is a H II region emission nebula located in the constellation Cygnus. It is sometimes also called the Tulip Nebula because it appears to resemble the outline of a tulip when imaged photographically. It was catalogued by astronomer Stewart Sharpless in his 1959 catalog of nebulae. It lies at a distance of about 6,000 light-years (5.7×10¹⁶ km; 3.5×10¹⁶ mi) from Earth.

Sh2-101, at least in the field seen from Earth, is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. Cygnus X-1 is located about 15′ west of Sh2-101. The companion star of Cygnus X-1 is a spectral class O9.7 Iab supergiant with a mass of 21 solar masses and 20 times the radius of the Sun. The period of the binary system is 5.8 days and the pair is separated by 0.2 astronomical units. The black hole has a mass of 15 solar masses and a Schwarzschild radius of 45 km. A bowshock is created by a jet of energetic particles from the black hole as they interact with the interstellar medium. It can be seen as an arc at the top of the photo on the left.

 

NGC 1333 Embryo nebula

 

This is a new version 2024

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time : 185 x 3min from 3 different nights(23/9 - 13/10 & 14/10/2023)

Programs I have used : Nina 2.3 _ PixInsight 1.8.9-2

Location: Grammatiko, Attiki

NGC 1333 is a reflection nebula located in the northern constellation Perseus, positioned next to the southern constellation border with Taurus and Aries.It was first discovered by German astronomer Eduard Schönfeld in 1855. The nebula is visible as a hazy patch in a small telescope, while a larger aperture will show a pair of dark nebulae designated Barnard 1 and Barnard 2. It is associated with a dark cloud L1450 (Barnard 205). Estimates of the distance to this nebula range from 980–1,140 ly (300–350 pc).

This nebula is in the western part of the Perseus molecular cloud and is a young region of very active star formation, being one of the best-studied objects of its type. It contains a fairly typical hierarchy of star clusters that are still embedded in the molecular cloud in which they formed, which are split into two main sub-groups to the north and south. Most of the infrared emission is happening in the southern part of the nebula. A significant portion of the stars seen in the infrared are in the pre-main sequence stage of their evolution.

M 20 Trifid nebula(LRGB)

Capture by Telescope live and processing by A.Chondrogiannis

Telescope : Planewave CDK 24"  f 6.5

Mount : Mathis MI-1000/1250 with absolute encoders

Camera :  FLI PL 9000

Guiding : Astrodon MonsterMOAG & Starlight Xpress Ultrastar

Time:1h 18min

Programs I have used : PixInsight 1.8.8 & Photoshop CS6

Location: El Sause,Chile

The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region in the north-west of Sagittarius in a star-forming region in the Milky Way's Scutum-Centaurus Arm. It was discovered by Charles Messier on June 5, 1764.^[4] Its name means 'three-lobe'. The object is an unusual combination of an open cluster of stars, an emission nebula (the relatively dense, reddish-pink portion), a reflection nebula (the mainly NNE blue portion), and a dark nebula (the apparent 'gaps' in the former that cause the trifurcated appearance, also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.

The most massive star that has formed in this region is HD 164492A, an O7.5III star with a mass more than 20 times the mass of the Sun. This star is surrounded by a cluster of approximately 3100 young stars.

 

Crescent nebula(NGC 6888) & Soap bubble- ZWO 533mc Pro

 

 

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000^{[citation needed]} years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures. 

 

 

Telescope : SW Esprit 100ED

Mount : SW EQ6-ri 

Camera : ZWO 533 mc pro

Guiding : 8x50 SW finder with QHY 5IIL

Filters:   Total exposure time : 9 hours with differnts exposures(300, 600sec.) , L-enchance 1.25.

Programs I have used : Nina 2.2 _ PixInsight 1.8.9-1

Location: Grammatiko, Attiki

M 27 Dumbbell Nebula--First light with ZWO 533mc pro--

 

6/4/2024 New version combine Optolong L-Enhance & Ir-cut filter from bortle 5 sky.

The Dumbbell Nebula (also known as the Apple Core Nebula, Messier 27, and NGC 6853) is a planetary nebula (nebulosity surrounding a white dwarf) in the constellation Vulpecula, at a distance of about 1360 light-years. It was the first such nebula to be discovered, by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and diameter of about 8 arcminutes, it is easily visible in binoculars and is a popular observing target in amateur telescopes. 

 

Telescope : SW Esprit 100ED

Mount : Skywatcher EQ6-ri 

Camera : ZWO 533 mc pro

Guiding :8x50 finder with QHY 5IIL

Filters:   Total exposure time : 81x180 (4hours & 3min) with flat & flatdarks but without Darks .

Programs I have used : Nina 2.2 _ PixInsight 1.8.9-1

Location: Grammatiko, Attiki

Western Veil nebula (HOORGB)

  The Western Veil (also known as Caldwell 34), consisting of NGC 6960 (the "Witch's Broom"),

 The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus.

It constitutes the visible portions of the Cygnus Loop, a supernova remnant, many portions of which have acquired their own individual names and catalogue identifiers. The source supernova was a star 20 times more massive than the Sun which exploded between 10,000 and 20,000 years ago. At the time of the explosion, the supernova would have appeared brighter than Venus in the sky, and visible in the daytime. The remnants have since expanded to cover an area of the sky roughly 3 degrees in diameter (about 6 times the diameter, and 36 times the area, of the full Moon). While previous distance estimates have ranged from 1200 to 5800light-years, a recent determination of 2400 light-years is based on direct astrometric measurements. (The distance estimates affect also the estimates of size and age.)

 

Telescope : SW Esprit 100ED

Mount : Skywatcher EQ6-R 

Camera : Atik 460 mono

Guiding :ZWO off-axis guider with QHY 5IIL

Filters :Ha ,OIII,RGB Total exposure time : 13 hours & 24minutes

Programs I have used : Nina 2.1 _ PixInsight 1.8.9

Location: Grammatiko, Attiki

IC 434_LHaRGB Horsehead and Flame nebula

 

 This is an old fits back to 2015 with WO FLT110 and Atik314mm. The deference is that the Ha is from my new setup SW Esprit 100 and Atik 460mm taken before 2 months.

-Telescope: William Optics FLT 110 with F/T focuser 3025 & SW Esprit 100
-Mount: Skywatcher EQ6 Skyscan pro and SW AZ-EQ5
-Chip: Atik 314L+ & Atik 460mm
-Guiding: TS finder 8x50 with Meade DSI I pro & ZWO offaxis guider
-Filter wheel: Starlight Xpress usb 7x1.25

 The Horsehead Nebula (also known as Barnard 33) is a dark nebula in the constellation Orion. The nebula is located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. The nebula was first recorded in 1888 by Scottish astronomer Williamina Fleming on photographic plate B2312 taken at the Harvard College Observatory. The Horsehead Nebula is approximately 1500 light years from Earth. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which bears some resemblance to a horse's head when viewed from Earth.

NGC 7380 Wizard nebula_SHO

 

Telescope : SW Esprit 100ED

Mount : Skywatcher AZ-EQ5 GT

Camera : Atik 460 mono

Guiding :ZWO off-axis guider with QHY 5IIL

Filters :Astrodon Ha(5nm), Baader SII & OIII. Total exposure time :400 min from 2 different nights .

Programs I have used : Nina 1.11 _ PixInsight 1.8.9

Location: Grammatiko, Attiki

 NGC 7380 is a young^[4] open cluster of stars in the northern circumpolar constellation of Cepheus, discovered by Caroline Herschel in 1787. The surrounding emission nebulosity is known colloquially as the Wizard Nebula, which spans an angle of 25′. German-born astronomer William Herschel included his sister's discovery in his catalog, and labelled it H VIII.77. The nebula is known as S 142 in the 1959 Sharpless catalog (Sh2-142).^[2] It is extremely difficult to observe visually, usually requiring very dark skies and an O-III filter. The NGC 7380 complex is located at a distance of approximately 8.5 kilolight-years from the Sun, in the Perseus Arm of the Milky Way.^[2]

 

https://en.wikipedia.org/wiki/Milky_Way

 

LBN 529 Cave Nebula LRGB/Ha

 

New Version 2023

 Telescope : SW Esprit 100ED

Mount : Skywatcher AZ-EQ5 GT

Camera : Atik 460 mono

Guiding : offaxis guider with QHY 5IIL

Filters :Baader LRGB Total exposure time : 9 hours and  5 minutes from 2 different nights .

Programs I have used : Nina 1.10 _ PixInsight 1.8.9_ Photoshop CS6

Location: Grammatiko, Attiki

Sh2-155 (also designated Caldwell 9, Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth.

Sh2-155 was first noted as a galactic emission nebula in 1959 in the extended second edition of the Sharpless catalogue, being a part of the much larger Cep OB3 Association. Although Sh2-155 is relatively faint for amateur observation, some of its structure may be seen visually through a moderately sized telescope under dark skies.

Sh2-155 lies at the edge of the Cepheus B cloud (part of the Cepheus molecular cloud), and is ionized by young stars from the Cep OB3 association It has been suggested that radiation from the hot O-type star HD 217086 is compressing the region, triggering the formation of a new generation of stars. A study of the region's young stellar objects by the Chandra X-ray Observatory and Spitzer Space Telescope shows a progression of stellar ages in front of the cloud, supporting the hypothesis of triggered star-formation.

IC 410 The Tadpoles -SHO

 

New edition with more live process 2024

Old edition

Telescope : SW Esprit 100ED

Mount : Skywatcher AZ-EQ5 GT

Camera : Atik 460 mono

Guiding :ZWO off-axis guider with QHY 5IIL

Filters :Astrodon Ha(5nm) 21x600, Baader O3 13x600, SII 9x600.Total : 7hours and 10min

Programs I have used : Nina 1.11 _ PixInsight 1.8.9

Location: Grammatiko, Attiki

The Tadpole Nebula (IC 410) is an H II region located approximately 12,400 light-years away in the northern constellation Auriga. It is associated with the young open cluster NGC 1893. The cluster has an apparent magnitude of 7.5 and an apparent size of 11 arcminutes. It is an easy target for small telescopes.

The dusty emission nebula IC 410 is ionized by five hot, blue, O-type stars, HD 242935 (O7.5V), BD +33 1025 (O7V), HD 242908 (O4.5V), HD 242926 (O7Vz), and TYC 2394-1214-1. These massive stars are believed to be the main sources of ionization in the region. They emit high-energy ultraviolet protons that excite the nebula and make it glow.

The nebula is more than 100 light-years across. It is part of a larger star-forming region that is also home to the nearby Flaming Star Nebula (IC 405).

Rozette Nebula_SHO

 

New Version 2023

The Rosette Nebula (also known as Caldwell 49) is an H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter. 

 The cluster and nebula lie at a distance of 5,000 light-years from Earth) and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses. 

 

Telescope : ASA 500N (19.6 inches) f\3.8

Mount : ASA DDM85 equatorial mount with direct drives

Camera :  FLI PL 16803

Time:3h 10min (28 Apr 2021)

Programs I have used : PixInsight 1.8.8 & Photoshop CS6

Location: El Sause,Chile