NGC 4954
| Galaxy NGC 4954 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Dragon |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 02 m 19.9 s |
| declination | + 75 ° 24 ′ 15 ″ |
| Appearance | |
| Morphological type | S0? |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 0.8 ′ × 0.6 ′ |
| Position angle | 62 ° |
| Surface brightness | 12.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.030961 +/- 0.000173 |
| Radial velocity | 9282 +/- 52 km / s |
|
Stroke distance v rad / H 0 |
(421 ± 30) x 10 6 ly (129.2 ± 9.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | November 22, 1797 |
| Catalog names | |
| NGC 4954, 4972 • UGC 8157 • PGC 44988 • CGCG 352-053, 353-008 • MCG + 13-09-044 • IRAS 13009 + 7540 • GC 3393, 3409 • H III 937 • h 1527 • | |
NGC 4954 is a 13.2 likes bright lenticular galaxy of Hubble type S0 in the constellation Dragon . She was spotted twice; first discovered on November 22nd, 1797 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "vF, S, iR, bM" (listed as NGC 4972 ). During an observation on May 5, 1831, John Herschel noted “h.1527 [NGC 4954] and III.937 [NGC 4972]. These are not impossibly one nebula, but, as both RAs and PDs differ very much, they may be different and are therefore separately stated ”(observation recorded as NGC 4954 ).