NGC 1691
| Galaxie NGC 1691 | |
|---|---|
| AladinLite | |
| Sternbild | Orion |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 04h 54m 38,3s [1] |
| Deklination | +03° 16′ 05″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | (R)SB(s)0/a: / Sbrst[1] |
| Helligkeit (visuell) | 12,2 mag[2] |
| Helligkeit (B-Band) | 13,1 mag[2] |
| Winkelausdehnung | 2,3′ × 1,8′[2] |
| Positionswinkel | 37°[2] |
| Flächenhelligkeit | 13,6 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | LGG 120 LDCE 358[1][3] |
| Rotverschiebung | 0.015281 ± 0.000033[1] |
| Radialgeschwindigkeit | (4581 ± 10) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) |
(202 ± 14)e6 Lj (61,8 ± 4,3) Mpc [1] |
| Durchmesser | 135.000 Lj[4] |
| Geschichte | |
| Entdeckung | Edouard Stephan |
| Entdeckungsdatum | 15. Dezember 1876 |
| Katalogbezeichnungen | |
| NGC 1691 • UGC 3201 • PGC 16300 • CGCG 420-019 • MCG +01-13-009 • IRAS 04520+0311 • 2MASX J04543832+0316045 • Mrk 1088 • | |
NGC 1691 ist eine linsenförmige Galaxie vom Hubble-Typ SB0-a im Sternbild Orion. Sie ist schätzungsweise 202 Millionen Lichtjahre von der Milchstraße entfernt.
Das Objekt wurde am 15. Dezember 1876 von Edouard Stephan entdeckt.[5]
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