NGC 7250

NGC 7250
NGC 7250 imaged by the Hubble Space Telescope[1]
Observation data (J2000 epoch)
ConstellationLacerta[1]
Right ascension22h 18m 17.776s[2]
Declination+40° 33′ 44.66″[2]
Redshift0.0039[3]
Heliocentric radial velocity1,168 km/s[3]
Distance49.99 ± 14.37 Mly (15.328 ± 4.407 Mpc)[4]
Apparent magnitude (V)12.58[3]
Apparent magnitude (B)13.22[3]
Characteristics
TypeIrr
Mass4.7×108[5] M☉
Size~42,300 ly (12.97 kpc) (estimated)[4]
Apparent size (V)1.7′ × 0.8′[4]
Other designations
PGC 68535, UGC 11980, MCG+07-45-024, Mrk 907, Z 530-22

NGC 7250 is an irregular galaxy located in the Lacerta constellation. It is a blue-colored galaxy with bright bursts of star formation: its star-forming rate is more than an order of magnitude greater than that of the Milky Way.[5] It was discovered by German-British astronomer William Herschel on 8 November 1790.[6]

The brighter star located in front of the galaxy is named TYC 3203-450-1, and is barely studied. It is about a million times closer to Earth than it the galaxy itself.[7]

Supernova

One supernova has been observed in NGC 7250. SN 2013dy (Type Ia, mag. 17) was discovered by the Lick Observatory Supernova Search (LOSS) on 10 July 2013.[8][9] It was detected about 2.4 hours after the explosion, making it the earliest-known detection of a supernova at the time.[10]

See also

References

  1. ^ a b "A matter of distance". www.spacetelescope.org. Retrieved 24 April 2017.
  2. ^ a b 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.
  3. ^ a b c d "NGC 7250". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 April 2017.
  4. ^ a b c "NED results for object NGC 7250". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 24 April 2017.
  5. ^ a b Pan, Y.-C.; Foley, R. J.; Kromer, M.; Fox, O. D.; Zheng, W.; Challis, P.; Clubb, K. I.; Filippenko, A. V.; Folatelli, G.; Graham, M. L.; Hillebrandt, W.; Kirshner, R. P.; Lee, W. H.; Pakmor, R.; Patat, F.; Phillips, M. M.; Pignata, G.; Röpke, F.; Seitenzahl, I.; Silverman, J. M.; Simon, J. D.; Sternberg, A.; Stritzinger, M. D.; Taubenberger, S.; Vinko, J.; Wheeler, J. C. (2015). "500 days of SN 2013dy: Spectra and photometry from the ultraviolet to the infrared". Monthly Notices of the Royal Astronomical Society. 452 (4): 4307. arXiv:1504.02396. Bibcode:2015MNRAS.452.4307P. doi:10.1093/mnras/stv1605. S2CID 119304628.
  6. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 7250". Celestial Atlas. Retrieved 22 August 2025.
  7. ^ Hille, Karl (2017-04-28). "Hubble's Bright Shining Lizard Star". NASA. Retrieved 2017-04-30.
  8. ^ Casper, C.; Zheng, W.; Li, W.; Filippenko, A. V.; Cenko, S. B.; Ciabattari, F.; Elenin, L.; Molotov, I.; Balam, D. D.; Graham, M. L.; Hsiao, E. Y.; Zhang, J. -J.; Wang, X. -F.; Clubb, K. I.; Fox, O. D.; Kelley, P. L.; Silverman, J. M. (2013). "Supernova 2013dy in NGC 7250 = PSN J22181760+4034096". Central Bureau Electronic Telegrams (3588): 1. Bibcode:2013CBET.3588....1C.
  9. ^ "SN 2013dy". Transient Name Server. IAU. Retrieved 21 August 2025.
  10. ^ Zheng, Weikang; Silverman, Jeffrey M.; Filippenko, Alexei V.; Kasen, Daniel; Nugent, Peter E.; Graham, Melissa; Wang, Xiaofeng; Valenti, Stefano; Ciabattari, Fabrizio; Kelly, Patrick L.; Fox, Ori D.; Shivvers, Isaac; Clubb, Kelsey I.; Cenko, S. Bradley; Balam, Dave; Howell, D. Andrew; Hsiao, Eric; Li, Weidong; Howie Marion, G.; Sand, David; Vinko, Jozsef; Wheeler, J. Craig; Zhang, Jujia (2013). "THE VERY YOUNG TYPE Ia SUPERNOVA 2013dy: DISCOVERY, AND STRONG CARBON ABSORPTION IN EARLY-TIME SPECTRA". The Astrophysical Journal. 778 (1): L15. arXiv:1310.5188. Bibcode:2013ApJ...778L..15Z. doi:10.1088/2041-8205/778/1/L15. S2CID 118352094.
  • Media related to NGC 7250 at Wikimedia Commons



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