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NGC 57

From Wikipedia, the free encyclopedia
Galaxy in the constellation Pisces
NGC 57
Elliptical galaxy
NGC 57 imaged by SDSS
Observation data (J2000 epoch)
Constellation Pisces [1]
Right ascension 00h 15m 30.9132s[2]
Declination +17° 19′ 42.307″[2]
Redshift 0.018146[2]
Heliocentric radial velocity 5,440 ± 22 km/s [2]
Distance 243 Mly [3]
Apparent magnitude (V)11.8[1]
Apparent magnitude (B)12.8[1]
Characteristics
Type E[2]
Apparent size (V)2.2′ ×ばつ 1.9′[2]
Other designations
UGC 145, MCG +03-01-031, PGC 1037, CGCG 456-046[2]

NGC 57 is an elliptical galaxy in the constellation Pisces.[1] It was discovered by German-British astronomer William Herschel on 8 October 1784.[4]

SN 2010dq imaged on 3 September 2010

Supernovae

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Three supernovae have been observed in NGC 57:

  • SN 2010dq (type Ia, mag. 17) was discovered by Kōichi Itagaki on 3 June 2010. It was 17" west and 1" south of the center of NGC 57 at coordinates 00h 15m 29.70s, +17° 19′ 41.0″.[5] [6]
  • 2011fp (type Ia, mag. 17.9) was discovered by Kōichi Itagaki on 29 August 2011.[7] [8]
  • SN 2020mza (mag 19.9) was discovered on 18 June 2020.[9]

See also

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NGC 57 (2MASS)

References

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  1. ^ a b c d "Revised NGC Data for NGC 57". spider.seds.org. Retrieved 2017年12月18日.
  2. ^ a b c d e f g "Results for object NGC 0057". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 2006年12月22日.
  3. ^ An object's distance from Earth can be determined using Hubble's law: v=Ho is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=Ho
  4. ^ "New General Catalog Objects: NGC 50 - 99". cseligman.com. Retrieved 2017年12月18日.
  5. ^ Nakano, S. (2010). "Supernova 2010dq in NGC 57". Central Bureau Electronic Telegrams (2303): 1. Bibcode:2010CBET.2303....1N.
  6. ^ "SN 2010dq". Transient Name Server. IAU . Retrieved 21 December 2024.
  7. ^ Nakano, S.; Nishimura, K.; Yamaoka, H.; Noguchi, T.; Magill, L.; Kotak, R.; Smartt, S.; Pastorello, A.; Maguire, K. (2011). "Supernova 2011fp in NGC 57 = PSN J00152561+1719119". Central Bureau Electronic Telegrams (2820): 1. Bibcode:2011CBET.2820....1N.
  8. ^ "SN 2011fp". Transient Name Server. IAU . Retrieved 21 December 2024.
  9. ^ "2020mza | Transient Name Server". www.wis-tns.org. Retrieved 2025年01月02日.
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