NGC 7477
| Galaxie NGC 7477 | |
|---|---|
| AladinLite | |
| Sternbild | Fische |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 23h 04m 40,6s [1] |
| Deklination | +03° 07′ 05″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | S[2] |
| Helligkeit (visuell) | 15,7 mag[2] |
| Helligkeit (B-Band) | 16,5 mag[2] |
| Winkelausdehnung | 0,3' × 0,2'[2] |
| Positionswinkel | 15°[2] |
| Flächenhelligkeit | 12,5 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0,031890[1] |
| Radialgeschwindigkeit | 9560 km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) |
(433 ± 30)e6 Lj (132,9 ± 9,3) Mpc [1] |
| Durchmesser | 40.000 Lj[3] |
| Geschichte | |
| Entdeckung | Heinrich d’Arrest |
| Entdeckungsdatum | 9. September 1866 |
| Katalogbezeichnungen | |
| NGC 7477 • PGC 1245518 • 2MASX J23044064+0307048 • | |
NGC 7477 ist eine Galaxie vom Hubble-Typ S im Sternbild Fische. Sie ist schätzungsweise 433 Millionen Lichtjahre von der Milchstraße entfernt.
Das Objekt wurde am 9. September 1866 vom deutsch-dänischen Astronomen Heinrich d’Arrest entdeckt.[4]
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