Mu Coronae Australis

μ Coronae Australis
Observation data
Epoch J2000      Equinox J2000
Constellation Corona Australis
Right ascension 18h 47m 44.61865s[1]
Declination −40° 24′ 22.2019″[1]
Apparent magnitude (V) 5.217[2]
Characteristics
Spectral type G5-6III[3]
B−V color index +0.78[3]
Astrometry
Radial velocity (Rv)-16.26 ± 0.22 km/s
Proper motion (μ) RA: 24.87[1] mas/yr
Dec.: -18.77[1] mas/yr
Parallax (π)8.24 ± 0.32[1] mas
Distance400 ± 20 ly
(121 ± 5 pc)
Absolute magnitude (MV)-0.37[4]
Details
Mass3.065[4] M☉
Temperature5370[4] K
Rotational velocity (v sin i)7.7 ± 10[3] km/s
Age0.361 ± 0.066[4] Gyr
Other designations
CD−40° 12807, FK5 3492, HD 173540, HIP 92226, HR 7050, SAO 229285
Database references
SIMBADdata

Mu Coronae Australis (μ CrA) is a star located in the constellation Corona Australis. Its apparent magnitude is 5.217.[2] Parallax measurements by Hipparcos put it at 400 light-years, or 121 parsecs away.[1]

Mu Coronae Australis is a G-type giant star with an absolute magnitude of -0.37.[4] Its mass is 3.065 times that of the Sun. It is roughly 361 million years old.[4]

References

  1. 1 2 3 4 5 6 van Leeuwen, F.; et al. (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 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. 1 2 3 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762.
  4. 1 2 3 4 5 6 Feltzing, S.; Holmberg, J.; Hurley, J. R. (2001). "The solar neighbourhood age-metallicity relation - Does it exist?". Astronomy & Astrophysics. 377 (3): 911. arXiv:astro-ph/0108191. Bibcode:2001A&A...377..911F. doi:10.1051/0004-6361:20011119.
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