NGC 1242
Galaxy NGC 1242 |
|
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HST image of NGC 1241 (center) together with NGC 1242 (top left) | |
AladinLite | |
Constellation | Eridanus |
Position equinox : J2000.0 , epoch : J2000.0 |
|
Right ascension | 03 h 11 m 19.3 s |
declination | -08 ° 54 ′ 09 ″ |
Appearance | |
Morphological type | SB (rs) c: |
Brightness (visual) | 13.7 mag |
Brightness (B-band) | 14.4 mag |
Angular expansion | 1.2 ′ × 0.6 ′ |
Position angle | 130 ° |
Surface brightness | 13.2 mag / arcmin² |
Physical data | |
Affiliation | NGC 1241 group LGG 84 |
Redshift | 0.013369 ± 0.000017 |
Radial velocity | (4008 ± 5) km / s |
Stroke distance v rad / H 0 |
(177 ± 12) · 10 6 ly (54.4 ± 3.8) Mpc |
diameter | 65,000 ly |
history | |
discovery | Wilhelm Herschel |
Discovery date | December 15, 1786 |
Catalog names | |
NGC 1242 • PGC 11892 • MCG -02-09-012 • Arp 304 • VV 334b • GC 655 • H III 591 • GALEX ASC J031119.31-085406.6 • AGC 430083 • Holm 68C |
NGC 1242 is a barred spiral galaxy of the Hubble type SBc in the constellation Eridanus in the southern sky . It is estimated to be 177 million light-years from the Milky Way and about 81,000 light-years across. Together with NGC 1241 , it forms an interacting pair of galaxies. Together with NGC 1247 , PGC 11824 and PGC 11937 it also forms the NGC 1241 group .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class Unclassified double galaxies .
In the same area of the sky is u. a. the galaxy NGC 1237 .
The object was discovered on December 15, 1786 by the astronomer Wilhelm Herschel .
literature
- Jeff Kanipe and Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide , Richmond 2006, ISBN 978-0-943396-76-7
Web links
Individual evidence
- ^ Aladin Lite
- ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e f SEDS : NGC 1242
- ^ VizieR
- ^ Díaz et al .: "Circumnuclear Structures in the Interacting Seyfert Galaxy NGC 1241: Kinematics and Optical / Infrared Morphology"; in: The Astrophysical Journal, Vol. 597, Issue 2, pp. 860 to 869, bibcode : 2003ApJ ... 597..860D (English)
- ↑ Seligman