| NGC 7828 | |
|---|---|
 NGC 7828 (right) byHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Cetus |
| Right ascension | 00h 06m 27.1s[1] |
| Declination | −13° 24′ 58″[1] |
| Redshift | 0.019110 ± 0.000050[1] |
| Heliocentric radial velocity | 5,729 ± 15km/s[1] |
| Distance | 294 ± 4.2Mly (90.25 ± 1.3Mpc)[1] |
| Apparent magnitude (V) | 13.9[2] |
| Characteristics | |
| Type | Im pec (Ring B)[1] |
| Apparent size (V) | 0.9′ × 0.5′[1] |
| Notable features | Interacting galaxy |
| Other designations | |
| IRAS 00038-1341,Arp 144,MCG -02-01-025,PGC 483,VV 272a | |
NGC 7828 is apeculiar galaxy in the constellationCetus. The galaxy lies about 300 millionlight years away from Earth, which means, given its apparent dimensions, that NGC 7828 is approximately 75,000 light years across.[1] It was discovered by the American astronomerFrancis Leavenworth in 1886.[3] NGC 7828 forms a pair with its neighborNGC 7829. The galaxy is included inHalton Arp'sAtlas of Peculiar Galaxies in the elliptical galaxies emanating material category as Arp 144.
NGC 7828 is interacting with NGC 7829, lying about 30 arcseconds from its nucleus. The interaction of the two galaxies, which have similar mass, has led to the creation of an empty ring in NGC 7828. The nucleus of NGC 7828 is obscured in visual light, but it is more visible in the infrared.[4] The ring appears to be partial inH-alpha. Thestar formation rate of the ring galaxy is estimated to be 6.86M☉ per year.[5] The two galaxies are surrounded by a neutral hydrogen gas cloud extending to the southeast for 6 arcminutes and 3 arcminutes to the west.[6]
Twosupernovae have been observed in NGC 7828, AT2018ewx and SN 2021ocs.[7] SN 2021ocs was atype Ic supernova discovered around maximum magnitude. Its spectrum was unusual, being dominated byoxygen andmagnesiumemission lines.[8] It was discovered on May 30, 2021, by theATLAS[9] (Asteroid Terrestrial-impact Last Alert System) astronomical survey and had anapparent magnitude of 17.7.[10]
{{cite journal}}: CS1 maint: multiple names: authors list (link)
