NGC 721
| Galaxie NGC 721 | |
|---|---|
| AladinLite | |
| Sternbild | Andromeda |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 01h 54m 45,4s [1] |
| Deklination | +39° 23′ 01″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | SB(rs)bc[1] |
| Helligkeit (visuell) | 13,3 mag[2] |
| Helligkeit (B-Band) | 14,1 mag[2] |
| Winkelausdehnung | 1,7′ × 1′[2] |
| Positionswinkel | 135°[2] |
| Flächenhelligkeit | 13,7 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0.018670 ± 0.000023[1] |
| Radialgeschwindigkeit | (5597 ± 7) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) |
(256 ± 18)e6 Lj (78,6 ± 5,5) Mpc [1] |
| Durchmesser | 125.000 Lj[3] |
| Geschichte | |
| Entdeckung | Heinrich Louis d’Arrest |
| Entdeckungsdatum | 27. August 1862 |
| Katalogbezeichnungen | |
| NGC 721 • UGC 1376 • PGC 7097 • CGCG 522-056 • MCG +06-05-043 • IRAS 01517+39087 • 2MASX J01544546+3923006 • GC 433 • | |
NGC 721 ist eine Balkenspiralgalaxie vom Hubble-Typ SBbc im Sternbild Andromeda, welche etwa 256 Millionen Lichtjahre von der Milchstraße entfernt ist.
Sie wurde am 27. August 1862 von dem deutsch-dänischen Astronomen Heinrich Louis d’Arrest entdeckt.[4]
Weblinks
- SIMBAD Astronomical Database
- Auke Slotegraaf: NGC 721. Deep Sky Observer's Companion, abgerufen am 7. November 2015 (englisch).
- CDS Portal
Einzelnachweise
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