NGC 7222 is a large barred spiral galaxy with a ring structure,[1] located in the constellation Aquarius.[2] It is located 570 million light-years away from the Solar System[3] and was discovered by German astronomer, Albert Marth on August 11, 1864.[4]
| NGC 7222 | |
|---|---|
 Sloan Digital Sky Survey image of barred spiral galaxy NGC 7222 | |
| Observation data (J2000 epoch) | |
| Constellation | Aquarius |
| Right ascension | 22h 10m 51.760s |
| Declination | +02d 06m 20.87s |
| Redshift | 0.041195 |
| Heliocentric radial velocity | 12,350 km/s |
| Distance | 568 Mly (174.1 Mpc) |
| Apparent magnitude (V) | 14.59 |
| Surface brightness | 14.20 mag/am |
| Characteristics | |
| Size | 281,000 ly |
| Apparent size (V) | 1.2 x 1.2 arcmin |
| Other designations | |
| PGC 68224, UGC 11934, CGCG 377-035, MCG +00-56-012, 2MASX J22105172+0206205, NSA 149629, SDSS J221051.74+020620.9, LEDA 68224 | |
NGC 7222 has a luminosity class of II and it has a broad H I line which contains regions of ionized hydrogen.[3] NGC 7222 also has a surface brightness of 14.20 mag/am, which means it is considered a low surface brightness galaxy (LSB).[5] LSBs are diffuse galaxies that have surface brightness one magnitude lower compared to the ambient night sky.
Supernova
editOne supernova has been discovered in NGC 7222 so far: SN 2008dr.
SN 2008dr
SN 2008dr was discovered by a team of astronomers; J. Leja, D. Madison, W. Li, and A. V. Filippenko from University of California, Berkeley as part of Lick Observatory Supernova Search (LOSS).[6] It had a magnitude of 16.8 and was located 1".3 west and 8".1 north of the nucleus.[7][8] SN 2008dr was confirmed to be a Type Ia.[9][10]
Companion galaxy
edit
NGC 7222 has a companion which is a spiral galaxy, PGC 68229, also known as CGCG 377-036.[11] The galaxy is located west of NGC 7222 at close proximity and is 579 million light-years distant.[12] It is possible both galaxies together make up a galactic pair.[4]
References
edit- ^ "HyperLeda -object description". atlas.obs-hp.fr. Retrieved 2024-05-06.
- ^ "NGC 7222". spider.seds.org. Retrieved 2024-05-10.
- ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-06.
- ^ a b "NGC Objects: NGC 7200 - 7249". cseligman.com. Retrieved 2024-05-06.
- ^ "Data from revised NGC and IC catalogue by Wolfgang Steinicke, NGC 7200 to 7299". astrovalleyfield.ca. Retrieved 2024-05-06.
- ^ Leja, J.; Madison, D.; Li, W.; Filippenko, A. V. (2008-06-01). "Supernovae 2008ct, 2008dq, 2008dr, and 2008ds". Central Bureau Electronic Telegrams. 1419: 1. Bibcode:2008CBET.1419....1L.
- ^ "SN 2008dr". w.astro.berkeley.edu. Retrieved 2024-05-06.
- ^ "Bright Supernovae - 2008". www.rochesterastronomy.org. Retrieved 2024-05-06.
- ^ "SN 2008dr | Transient Name Server". www.wis-tns.org. Retrieved 2024-05-06.
- ^ González-Gaitán, S.; Hsiao, E. Y.; Pignata, G.; Förster, F.; Gutiérrez, C. P.; Bufano, F.; Galbany, L.; Folatelli, G.; Phillips, M. M.; Hamuy, M.; Anderson, J. P.; de Jaeger, T. (2014-10-23). "DEFINING PHOTOMETRIC PECULIAR TYPE Ia SUPERNOVAE". The Astrophysical Journal. 795 (2): 142. arXiv:1409.4811. Bibcode:2014ApJ...795..142G. doi:10.1088/0004-637x/795/2/142. ISSN 1538-4357.
- ^ "HyperLeda -object description for PGC 68229". atlas.obs-hp.fr. Retrieved 2024-05-06.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-06.