Astronomy:Q Centauri

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Short description: Star in the constellation Centaurus
Q Centauri
Observation data
{{#ifeq:J2000.0|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000.0      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000.0}}
Constellation Centaurus[1]
A
Right ascension  13h 41m 44.770s[2]
Declination −54° 33′ 33.93″[2]
Apparent magnitude (V) +5.22[3]
B
Right ascension  13h 41m 44.956s[4]
Declination −54° 33′ 39.21″[4]
Apparent magnitude (V) +6.52[3]
Characteristics
Spectral type B8Vn + A0V[5]
U−B color index −0.23[citation needed]
B−V color index −0.05[citation needed]
Astrometry
A
Radial velocity (Rv)+14.49±0.74[2] km/s
Proper motion (μ) RA: −43.783[2] mas/yr
Dec.: −24.935[2] mas/yr
Parallax (π)11.2810 ± 0.0956[2] mas
Distance289 ± 2 ly
(88.6 ± 0.8 pc)
B
Proper motion (μ) RA: −43.783[4] mas/yr
Dec.: −24.935[4] mas/yr
Parallax (π)11.3203 ± 0.0329[4] mas
Distance288.1 ± 0.8 ly
(88.3 ± 0.3 pc)
Details
A
Mass2.8[6] M☉
Radius2.4[6] R☉
Luminosity70[6] L☉
Surface gravity (log g)4.12[6] cgs
Temperature10,740[6] K
B
Mass2.3[6] M☉
Radius1.6[6] R☉
Luminosity16[6] L☉
Surface gravity (log g)4.37[6] cgs
Temperature9,016[6] K
Other designations
HR 5141, HD 118991, CP−53°5725, HIP 66821, SAO 241076, GC 18495, CCDM J13417-5434
Database references
SIMBADdata
A
B

Q Centauri (Q Cen) is a binary star in the constellation Centaurus. It has a combined apparent magnitude of +4.99[1] and is approximately 288 light years from Earth.[2][4]

The primary component, Q Centauri A, is a blue-white B-type main sequence dwarf with an apparent magnitude of +5.2. Its companion, Q Centauri B, is a white A-type main sequence dwarf with an apparent magnitude of +6.5. The two stars are separated by 5.6 arcseconds on the sky.[7]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355. Bibcode: 2000A&A...355L..27H. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  5. ↑ Gray, R. O.; Garrison, R. F. (1987). "The Early A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation". The Astrophysical Journal Supplement Series 65: 581. doi:10.1086/191237. Bibcode: 1987ApJS...65..581G. 
  6. ↑ 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  7. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. 




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