NGC 777
| Galaxy NGC 777 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | triangle |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 00 m 14.9 s |
| declination | + 31 ° 25 ′ 46 ″ |
| Appearance | |
| Morphological type | E1 / Sy / LINER |
| Brightness (visual) | 11.5 likes |
| Brightness (B-band) | 12.5 mag |
| Angular expansion | 2.5 ′ × 2 ′ |
| Position angle | 155 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 777 group LGG 42 |
| Redshift | 0.016728 ± 0.000027 |
| Radial velocity | 5015 ± 8 km / s |
|
Stroke distance v rad / H 0 |
(230 ± 16) x 10 6 ly (70.4 ± 4.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 12, 1784 |
| Catalog names | |
| NGC 777 • UGC 1476 • PGC 7584 • CGCG 503-067 • MCG + 05-05-038 • 2MASX J02001493 + 3125457 • GC 469 • H II-223 • h 182 • GALEX ASC J020015.02 + 312546.6 | |
NGC 777 is an elliptical galaxy with an active nucleus of the Hubble type E1 in the constellation Triangulum in the northern sky . It is an estimated 230 million light years away from the Milky Way and has a diameter of about 170,000 ly. The galaxy has an angular extent of 2.5 ′ × 2.0 ′ and an apparent magnitude of 11.5 mag.
Together with NGC 750 , NGC 751 , NGC 761 , NGC 783 , NGC 785 , NGC 789 , PGC 7304 , PGC 7545 , PGC 7674 , PGC 7967 , PGC 8215 and PGC 8393 , it forms the NGC 777 group .
The object was discovered by Wilhelm Herschel on September 12, 1784 .
Web links
Commons : NGC 777 - collection of images, videos, and audio files
