NGC 2748

NGC 2748
NGC 2748 imaged by the Hubble Space Telescope
Observation data (J2000.0 epoch)
Constellation	Camelopardalis
Right ascension	09h 13m 43.037s [1]
Declination	+76° 28′ 31.23″ [1]
Redshift	0.004930 [2]
Heliocentric radial velocity	1,473 km/s [3]
Distance	61.3  Mly (18.79  Mpc) [3]
Apparent magnitude  (V)	11.7 [4]
Characteristics
Type	SAbc [5]
Apparent size  (V)	2.250 × 0.720 arcmin [2]
Other designations
UGC 4825, MCG +13-07-019, PGC 26018 [2]

NGC 2748 is a spiral galaxy in the northern circumpolar constellation of Camelopardalis, ^[6] located at a distance of 61.3 megalight-years from the Milky Way. ^[3] It was discovered September 2, 1828 by John Herschel. ^[6] The morphological classification of SAbc ^[5] indicates this is an unbarred spiral with moderate to loosely-wound spiral arms. It is a disk-like peculiar galaxy with a stellar shell that is rotating about the main galactic axis. This shell was most likely formed through the capture and disruption of a dwarf companion. ^[7] The galactic nucleus likely contains a supermassive black hole with a mass of 4.4+3.5
−3.6×10⁷  M_☉ , or 44 million times the mass of the Sun. ^[5]

Supernovae and Luminous Red Nova

Three supernovae and one luminous red nova have been observed in NGC 2748.

• A magnitude 14.5 supernova, designated SN 1985A, was discovered in this galaxy by Thomas Schildknecht on January 25, 1985, located 3″ west and 10″ south of the galaxy's nucleus. ^[8] It was later classified as a Type Ia supernova. ^{[9] [10]}
• On August 31, 2013, a supernova was discovered by Raffaele Belligoli and Flavio Castellani at a position 19″ west and 21″ north of the core of NGC 2748. ^[11] It was designated SN 2013ff and reached magnitude 15.2. Subsequent studies found a best match to a Type Ic supernova. ^{[12] [13]}
• Kōichi Itagaki announced the discovery of PSN J09132750+7627410 (also known as AT 2015xf) on 10 February 2015. The transient was originally classified as a luminous blue variable, a type of supernova impostor. ^{[14] [15]} Later analysis concluded that it was actually a luminous red nova (LRN). ^[16]
• SN 2017gkk (Type IIb, mag. 14.7) was discovered by Kōichi Itagaki on 31 August 2017. ^{[17] [18]}

See also

• List of NGC objects (2001–3000)

References

1. Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi: 10.1086/498708 . ISSN   0004-6256. S2CID   18913331.
2. "NGC 2748". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-04-16.
3. Tully, R. Brent; et al. (August 2016). "Cosmicflows-3". The Astronomical Journal. 152 (2): 21. arXiv: 1605.01765 . Bibcode:2016AJ....152...50T. doi: 10.3847/0004-6256/152/2/50 . S2CID   250737862. 50.
4. Frommert, Hartmut. "NGC 2748". SEDS. Retrieved 2020-04-16.
5. Atkinson, J. W.; et al. (May 2005). "Supermassive black hole mass measurements for NGC 1300 and 2748 based on Hubble Space Telescope emission-line gas kinematics". Monthly Notices of the Royal Astronomical Society. 359 (2): 504–520. arXiv: astro-ph/0502573 . Bibcode:2005MNRAS.359..504A. doi: 10.1111/j.1365-2966.2005.08904.x . S2CID   16193663.
6. Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 2700 - 2749". cseligman.com. Retrieved 2020-04-15.
7. Merkulova, O. A.; et al. (September 2009). "2-D spectroscopy of polar-ring galaxies candidates. II. The peculiar galaxies NGC 2748 and UGC 4385". Astronomy Letters. 35 (9): 587–598. Bibcode:2009AstL...35..587M. doi:10.1134/S1063773709090023. S2CID   121033172.
8. Wild, P.; Schildknecht, T. (January 1985). Marsden, B. G. (ed.). "Supernova 1985A in NGC 2748". IAU Circular. 4031: 3. Bibcode:1985IAUC.4031....3W.
9. Wegner, Gary; McMahan, Robert K. (February 1987). "Spectroscopy of the Supernova 1982V, 1984A, and 1985B". Astronomical Journal. 93: 287. Bibcode:1987AJ.....93..287W. doi: 10.1086/114312 .
10. "SN 1985A". Transient Name Server. IAU . Retrieved 5 August 2025.
11. Green, D. W. E. (2013). "Supernova 2013ff in NGC 2748 = PSN J09133888+7628108". Central Bureau Electronic Telegrams (3656): 1. Bibcode:2013CBET.3656....1G.
12. Brimacombe, J.; et al. (September 2013). Green, D. W. E. (ed.). "Supernova 2013ff in NGC 2748 = Psn J09133888+7628108". Central Bureau Electronic Telegrams. 3647: 1. Bibcode:2013CBET.3647....1B.
13. "SN 2013ff". Transient Name Server. IAU . Retrieved 5 August 2025.
14. Tartaglia, L.; Pastorello, A.; Benetti, S.; Cappellaro, E.; Elias-Rosa, N.; Ochner, P.; Terreran, G.; Tomasella, L.; Turatto, M. (12 February 2015). "Asiago spectroscopic observation of PSN J09132750+7627410". The Astronomer's Telegram. 7051: 1. Bibcode:2015ATel.7051....1T.
15. Tartaglia, L.; et al. (June 2016). "The Supernova Impostor PSN J09132750+7627410 and Its Progenitor". The Astrophysical Journal Letters. 823 (2): 7. arXiv: 1604.04628 . Bibcode:2016ApJ...823L..23T. doi: 10.3847/2041-8205/823/2/L23 . S2CID   118392026. L23.
16. "AT 2015xf". Transient Name Server. IAU . Retrieved 20 April 2025.
17. "SN 2017gkk". Transient Name Server. IAU . Retrieved 17 August 2024.
18. Onori, F.; et al. (September 2017). "Spectroscopic observation of SN2017gkk by NUTS (NOT Un-biased Transient Survey)". The Astronomer's Telegram. 10698: 1. Bibcode:2017ATel10698....1O.

External links

• Media related to NGC 2748 at Wikimedia Commons
• Images
• Spectral data
• Supermassive black hole mass measurements for NGC 1300 and NGC 2748 based on HST emission-line gas kinematics