NGC 988 explained

NGC 988
Epoch:J2000
Constellation Name:Cetus
Ra:[1]
Z:0.005075[2]
Dist Ly:50.0 ± 10.9 Mly (15.33 ± 3.35 Mpc) [3]
Type:SB(s)cd
Appmag V:11.0
Size V:4.6 × 2.5
Names:UGCA 35, PGC 9843

NGC 988 is a spiral galaxy located in the constellation Cetus.[4] It lies at a distance of 50 million light years from Earth, which, given its apparent dimensions, means that NGC 988 is about 75,000 light years across. Magnitude 7.1 HD 16152 is superposed 52" northwest of the center of NGC 988. The galaxy was discovered by Édouard Jean-Marie Stephan in 1879. One ultraluminous X-ray source has been detected in NGC 988.[5]

NGC 988 is the brightest galaxy in NGC 1052 group[6] (which is also known as NGC 988 group), which also includes the elliptical galaxy NGC 1052, NGC 991, NGC 1022, NGC 1035, NGC 1042, NGC 1047, NGC 1051, NGC 1084, NGC 1110. It belongs in the same galaxy cloud as Messier 77.[7]

One supernova has been observed in NGC 988: SN 2017gmr, a Type II supernova discovered on 4 September 2017.[8]

Notes and References

  1. Web site: The Interactive NGC Catalog Online . Results for NGC 988 . 2014-06-02.
  2. Web site: SIMBAD Astronomical Database . Results for NGC 988 . 2014-06-02.
  3. Web site: NASA/IPAC Extragalactic Database . Results for NGC 988 . 2017-09-21 .
  4. http://dso-browser.com/deep-sky/1885/ngc-988/galaxy Deep Sky ngc-988
  5. Liu. Jifeng. Chandra ACIS Survey of X-ray Point Sources in 383 Nearby Galaxies. I. The Source Catalog. The Astrophysical Journal Supplement Series. 1 January 2011. 192. 1. 10. 10.1088/0067-0049/192/1/10. 0811.0804. 2011ApJS..192...10L. 119213008.
  6. McKay. N. P. F.. Mundell. C. G.. Brough. S.. Forbes. Duncan A.. Barnes. D. G.. James. P. A.. Goudfrooij. P.. Kozhurina-Platais. V.. Whitaker. R.. The discovery of new galaxy members in the NGC 5044 and 1052 groups. Monthly Notices of the Royal Astronomical Society. August 2004. 352. 4. 1121–1134. 10.1111/j.1365-2966.2004.08007.x. astro-ph/0405241. 2004MNRAS.352.1121M. 15387568.
  7. Makarov. Dmitry. Karachentsev. Igor. Galaxy groups and clouds in the local (z~ 0.01) Universe. Monthly Notices of the Royal Astronomical Society. 21 April 2011. 412. 4. 2498–2520. 10.1111/j.1365-2966.2010.18071.x. 1011.6277. 2011MNRAS.412.2498M. 119194025. 21 September 2017. 31 January 2016. https://web.archive.org/web/20160131020344/http://www.sao.ru/hq/dim/groups/galaxies.dat. dead.
  8. https://www.wis-tns.org/object/2017gmr Transient Name Server entry for SN 2017gmr.

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