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NGC 1232 is an intermediate spiral galaxy about 60 million light-years away[2] in the constellation Eridanus. It was discovered by German-British astronomer William Herschel on 20 October 1784.[3]

NGC 1232
NGC 1232 by ESO
Observation data (J2000 epoch)
ConstellationEridanus
Right ascension03h 09m 45.5s[1]
Declination−20° 34′ 46″[1]
Redshift0.005347[1]
Helio radial velocity1603 ± 1 km/s[1]
Distance61 ± 8.5 Mly
(18.7 ± 2.6 Mpc)[2]
Apparent magnitude (V)10.9[1]
Characteristics
TypeSAB(rs)c[1]
Apparent size (V)7′.4 × 6′.5[1]
Notable featureslarge satellite
Other designations
PGC 11819,[1] Arp 41[1]

It is dominated by millions of bright stars and dark dust, in spiral arms rotating about the center. Open clusters containing bright blue stars are sprinkled along these spiral arms, with dark lanes of dense interstellar dust between. Less visible are dimmer stars and interstellar gas, comprising such a high mass that they dominate the dynamics of the inner galaxy. Not visible is matter of unknown form called dark matter, needed to explain the motions of the visible material in the outer galaxy. The galaxy is approximately 200,000 light-years across, in between the sizes of the Andromeda Galaxy and our home galaxy, the Milky Way.

NGC 1232 and its satellite are part of the Eridanus cluster of galaxies, along with NGC 1300.


NGC 1232A


NGC 1232A is a satellite galaxy of NGC 1232.[4] It is thought to be the cause of unusual bending in the spiral arms. In 1988, NGC 1232A was estimated to be 68 million light-years away[5] while NGC 1232 was estimated to be 65 million light-years away.[2]


See also



References


  1. "NED results for object NGC 1232". NASA/IPAC Extragalactic Database. Retrieved 2006-11-25.
  2. "Distance Results for NGC 1232". NASA/IPAC Extragalactic Database. Retrieved 2010-06-22.
  3. Seligman, Courtney. "NGC Objects: NGC 1200 - 1249". cseligman.com. Retrieved 14 February 2019.
  4. "NED results for object NGC 1232A". NASA/IPAC Extragalactic Database. Retrieved 2010-06-22.
  5. "Distance Results for NGC 1232A". NASA/IPAC Extragalactic Database. Retrieved 2010-06-22.


Wikimedia Commons has media related to NGC 1232.



На других языках

[de] NGC 1232

NGC 1232 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBc im Sternbild Eridanus am Südsternhimmel. Sie hat eine Helligkeit von 9,8 mag und eine Winkelausdehnung von 7,4 × 6,5'. Die Galaxie ist rund 68 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 160.000 Lichtjahren. NGC 1232 ist Mitglied des Eridanus-Galaxienhaufens. Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxie gehört zu der Klasse Spiralgalaxien mit einem Begleiter niedriger Flächenhelligkeit auf einem Arm (Arp-Katalog). Mit seinem scheinbaren Begleiter PGC 11834 (inoffiziell NGC 1232A bezeichnet) bildet NGC 1232 das Objekt Arp 41.
- [en] NGC 1232

[ru] NGC 1232

NGC 1232 (другие обозначения — ESO 547-14, MCG -4-8-32, Arp 41, PGC 11819) — спиральная галактика с перемычкой (SBc) в созвездии Эридан.


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