- H25 minutes (5 frames)
The Fishhead Nebula (IC 1795) is an emission nebula located in the constellation Cassiopeia, approximately 6,500 light-years from Earth. Its name comes from its shape, reminiscent of a fish's head, making it one of the most unique objects in the night sky.
Structure and Composition
The Fishhead Nebula is part of a star-forming region where active processes of new star formation occur. The nebula contains large amounts of gas and dust, which are illuminated by young stars being born within it. These stars emit vast amounts of ultraviolet light, which excites the surrounding gas, causing it to glow in bright colors.
The nebula is composed of ionized hydrogen, as well as oxygen and sulfur, giving it rich red, green, and blue hues. This effect is often depicted as false color in images such as those taken by the Hubble Telescope.
Stars and their influence
At the center of the nebula is the NGC 896 region, home to many young and massive stars that actively emit ultraviolet radiation. This radiation plays a key role in exciting the gas, causing it to glow like a neon lamp, creating the bright glow of the nebula.
Location and size
The Fish Head Nebula is located near and is part of the larger Heart Nebula (IC 1805). Despite the large area of the nebula, many observers, including amateur astronomers, prefer to photograph only its individual sections, such as the "fish head", as this allows for better detail capture using narrowband filters and a color palette inspired by the Hubble.
Observation Methods and Photography
Photographing the Fishhead Nebula requires the use of monochrome cameras with narrow-band filters to accurately capture all the shades of the Hubble palette. This allows astronomers and amateur astronomers to accurately convey the beauty and structure of the object, preserving the details of gas and dust clouds.
Conclusion
The Fishhead Nebula (IC 1795) is a fascinating object for observation and research, due to its bright colors and active process of star formation. Its study helps to better understand the dynamics of stellar systems and processes occurring in molecular clouds, and also develops new observational methods applied to other objects in the Universe.
Visibility chart of Fish Head Nebula (IC 1795) during the day
| Date | Moon Phase | Exposure | CCD Temperature | Gain | Offset | Filter |
|---|---|---|---|---|---|---|
- 2023ixf•
- 40 Eri•
- Abell 74•
- Artemis A868 SA•
- a Canis Minoris•
- C 2020 R4 ATLAS•
- C 2020 T2 Palomar•
- C 2021 S3 (PANSTARRS)•
- Haumea (2003 EL61)•
- HCG 68•
- HCG 92•
- IC 1318B•
- IC 1396•
- IC 1795•
- IC 1805•
- IC 1848•
- IC 1871•
- IC 3322A•
- IC 342•
- IC 4015•
- IC 405•
- IC 417•
- IC 434•
- IC 443•
- IC 4703•
- IC 5070•
- IC 5146•
- IC 63•
- M 1•
- M 101•
- M 103•
- M 109•
- M 13•
- M 15•
- M 27•
- M 3•
- M 33•
- M 42•
- M 45•
- M 5•
- M 51•
- M 57•
- M 63•
- M 64•
- M 74•
- M 76•
- M 81•
- M 82•
- M 86•
- M 87•
- M 94•
- M 97•
- NGC 147•
- NGC 1491•
- NGC 1499•
- NGC 1579•
- NGC 1961•
- NGC 2146•
- NGC 2239•
- NGC 2403•
- NGC 281•
- NGC 4236•
- NGC 4565•
- NGC 4631•
- NGC 507•
- NGC 508•
- NGC 5866•
- NGC 5907•
- NGC 6503•
- NGC 6823•
- NGC 6888•
- NGC 6946•
- NGC 6992•
- NGC 6995•
- NGC 7000•
- NGC 7023•
- NGC 7129•
- NGC 7217•
- NGC 7331•
- NGC 7380•
- NGC 7538•
- NGC 7635•
- NGC 7640•
- NGC 7822•
- NGC 891•
- NGC 896•
- NGC 925•
- PGC 54559•
- Sh2-155•
- Sh2-168•
- Sh2 103•
- Sh2 109•
- Sh2 132•
- T CrB•
- UGC 6930•
- V1405 Cas•
- Vesta A807 FA•