Telescope : SW Esprit 100ED
Mount : SW Wave 150i
Camera : ZWO 533mc
Guiding :Zwo 120mono with Touptek oag
Filters: Total exposure time :4hours and 9minutes with SVBONY 260 5band 2"
Programs I have used : ZWO AsiAir & PixInsight 1.9.3
NGC 4565, also known as the Needle Galaxy or Caldwell 38, is one of the most famous and stunning examples of an edge-on spiral galaxy.
Key Characteristics
- Location: Situated in the constellation Coma Berenices, near the North Galactic Pole.
- Distance: Estimated to be between 30 and 50 million light-years away from Earth.
- Size: It has a diameter of approximately 100,000 to 140,000 light-years, making it similar to or slightly larger than our own Milky Way.
- Apparent Magnitude: Around 9.6 to 10.4, which makes it visible even through small amateur telescopes under good conditions.Morphology and Appearance
- Shape: Due to its inclination (nearly 90 degrees relative to us), it appears as an extremely thin and elongated streak of light, which is how it earned the name "Needle."
- Structure: It features a bright central bulge and a prominent dark dust lane cutting across the plane of its disk, offering a view similar to what the Milky Way would look like if viewed from the outside.
- Classification: Although originally thought to be a simple spiral, newer observations (e.g., from the Spitzer telescope) suggest it is a barred spiral galaxy.
Observation
- Equipment: Through small telescopes (80mm), it appears as a thin, fuzzy line. With larger instruments (8 inches and up), the dust lane and details in the central core become visible.
- Companions: It is often photographed alongside its smaller neighbor, NGC 4562, with which it may be gravitationally interacting.
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