NGC 404
| Galaxy NGC 404 |
|
|---|---|
|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 09 m 27.0 s |
| declination | + 35 ° 43 ′ 05 ″ |
| Appearance | |
| Morphological type | SA (s) 0-: LINER |
| Brightness (visual) | 10.0 mag |
| Brightness (B-band) | 11.0 mag |
| Angular expansion | 3.5 ′ × 3.5 ′ |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 11 |
| Redshift | −0.00016 ± 0.00003 |
| Radial velocity | −48 ± 9 km / s |
|
Stroke distance v rad / H 0 |
(5 ± 1) x 10 6 ly (1.5 ± 0.18) Mpc |
| Absolute brightness | −16.5 mag |
| Dimensions | 3 · 10 10 M ☉ |
| diameter | approx. 11,000 ly |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 13, 1784 |
| Catalog names | |
| NGC 404 • UGC 718 • PGC 4126 • CGCG 520-020 • MCG + 06-03-018 • IRAS 01066 + 3527 • GC 218 • H II 224 • h 89 • | |
NGC 404 is a lenticular dwarf galaxy of the Hubble type S0 in the constellation Andromeda in the northern sky . The galaxy is about 10 million light years from the Milky Way and about 10,000 light years in diameter.
Seen from Earth, NGC 404 is only seven arc minutes from the star Mirach (β Andromedae), which is why the object is also known as the "Spirit of Mirach".
Although NGC 404 was accepted as a member of the loose galaxy group LGG 11, an actual physical bond with the other members of this group is unlikely due to the great distance.
NGC 404 was discovered by Friedrich Wilhelm Herschel on September 13, 1784 .
The mass-light ratio is approx. 44 M ☉ / L ☉ .
Web links
Commons : NGC 404 - collection of images, videos, and audio files
- GALEX
- MS del Río, E. Brinks, J. Cepa: High-Resolution HI Observations of the Galaxy NGC 404: A Dwarf S0 with Abundant Interstellar Gas. doi : 10.1086 / 421358 .
- Mirach's spirit. - Astronomy Picture of the Day from October 29, 2008.
Individual evidence
- ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e SEDS : NGC 404
- ↑ Karachentsev include: A Catalog of Neighboring Galaxies. In: The Astronomical Journal. Vol. 127, Issue 4, pp. 2031 ff. (2004). bibcode : 2004AJ .... 127.2031K
- ↑ Jensen et al .: Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations. In: The Astrophysical Journal . Vol. 583, Issue 2, pp. 712 ff. (2003). bibcode : 2003ApJ ... 583..712J
- ↑ NGC 404 (= PGC 4126), Mirach's Ghost. Seligman