NR Canis Majoris

NR Canis Majoris
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Major
Right ascension 07h 27m 07.99004s[1]
Declination −17° 51′ 53.5012″[1]
Apparent magnitude (V) 5.622[2]
Characteristics
Spectral type F2V[2]
B−V color index +0.32[3]
Astrometry
Radial velocity (Rv)-29.2[4] km/s
Proper motion (μ) RA: -2.52[1] mas/yr
Dec.: 1.45[1] mas/yr
Parallax (π)10.83 ± 0.56[1] mas
Distance300 ± 20 ly
(92 ± 5 pc)
Other designations
NR CMa, BD–17° 1980, HD 58954, HIP 36186, HR 2853, SAO 152894, ADS 6093, CCDM J07271-1752AB
Database references
SIMBADdata

NR Canis Majoris also known as HR 2853, HD 58954, and HIP 36186, is a Delta Scuti variable star with a spectral classification of F2V, which varies by a few hundredths of a magnitude over roughly 16 hours.[5] It is located to the east of Sirius, and east of Gamma Canis Majoris, practically on the border with Puppis.

NR Canis Majoris is 85.88 pc from the Sun, according to Hipparcos, and has a mass of 1.5 solar masses. It is about 2 billion years younger than the Sun.

NR Canis Majoris will eventually become the brightest star in the sky 2.6 million years from now to 3 million years from now, one of 4 different stars in Canis Major to hold that title (Alpha Canis Majoris, Beta Canis Majoris, and Epsilon Canis Majoris). During this period, NR Canis Majoris will be only 14 light years away and appear at -0.88 magnitude, about the same as Canopus today.[6]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 1 2 "NR CMa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 February 2017.
  3. ↑ Lake, R. (1964). "Photoelectric Magnitudes and Colours for 100 Southern Stars (Fifth List)". Monthly Notes of the Astron. Soc. Southern Africa. 23: 136. Bibcode:1964MNSSA..23..136L.
  4. ↑ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.
  5. ↑ Watson, Christopher (4 January 2010). "LS Canis Majoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 July 2014.
  6. ↑ "V* NR CMa". SIMBAD. Université de Strasbourg. Retrieved 10 May 2013.


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