IC 688
| Galaxie IC 688 | |
|---|---|
| AladinLite | |
| Sternbild | Becher |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 11h 23m 40,2s [1] |
| Deklination | −09° 47′ 44″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | Sab[1] |
| Helligkeit (visuell) | 14,5 mag[2] |
| Helligkeit (B-Band) | 15,5 mag[2] |
| Winkelausdehnung | 0,7′ × 0,3′[2] |
| Positionswinkel | 110°[2] |
| Flächenhelligkeit | 12,7 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | LDCE 810[1] |
| Rotverschiebung | 0.005420 ± 0.000037[1] |
| Radialgeschwindigkeit | (1625 ± 11) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) |
(66 ± 5)e6 Lj (20,2 ± 1,4) Mpc [1] |
| Durchmesser | 15.000 Lj[3] |
| Geschichte | |
| Entdeckung | Ormond Stone |
| Entdeckungsdatum | 9. Januar 1889 |
| Katalogbezeichnungen | |
| IC 688 • PGC 156572 • KUG 121-095 • 2MASX J11264427+5909197 • | |
IC 688 ist eine spiralförmige Zwerggalaxie vom Hubble-Typ Sab im Sternbild Becher südlich des Himmelsäquators. Sie ist schätzungsweise 67 Millionen Lichtjahre von der Milchstraße entfernt.
Das Objekt wurde am 9. Januar 1889 von dem US-amerikanischen Astronomen Ormond Stone entdeckt.[4]
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