29 Camelopardalis

Last updated
29 Camelopardalis
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 50m 33.8729s [1]
Declination +56° 55′ 08.1822″ [1]
Apparent magnitude  (V)6.590±0.009 [2]
Characteristics
29 Cam A
Spectral type A4 IV-V
U−B color index +0.13 [2]
B−V color index +0.09 [2]
29 Cam B
Spectral type A3 V
Astrometry
29 Cam A
Radial velocity (Rv)3.9±2 [3]  km/s
Proper motion (μ)RA: –19.460 [1]   mas/yr
Dec.: –4.249 [1]   mas/yr
Parallax (π)6.7370 ± 0.0607  mas [1]
Distance 484 ± 4  ly
(148 ± 1  pc)
Absolute magnitude  (MV)+0.71 [4]
29 Cam B
Proper motion (μ)RA: +2.585 [5]   mas/yr
Dec.: –0.570 [5]   mas/yr
Parallax (π)1.6375 ± 0.0483  mas [5]
Distance 1,990 ± 60  ly
(610 ± 20  pc)
Details
29 Cam A
Mass 2.47 ± 0.08 [6]   M☉
Radius 3.49+0.14
−0.12 [7]   R☉
Luminosity 58.9+8.9
−7.6 [6]   L☉
Surface gravity (log g)3.77 [8]   cgs
Temperature 8,337 ± 96 [6]   K
Rotational velocity (v sin i)123 [9]  km/s
Age 380 ± 14 [6]   Myr
29 Cam B
Mass 2.12 [10]   M☉
Radius 2.06 [11]   R☉
Luminosity15.043 [11]   L☉
Temperature 7911 [11]   K
Rotational velocity (v sin i)110±8 [12]  km/s
Other designations
BD+56° 1065, HD  38618, HIP  27592, HR  1992, SAO  25403, WDS J05506+5655A
Database references
SIMBAD data

29 Camelopardalis (29 Cam) is a double star in the circumpolar constellation Camelopardalis. With an apparent magnitude of 6.59, [2] it is right below the max visibility to the naked eye, and can only be viewed under phenomenal conditions. The star is located 484 light years [1] away based on parallax, but is drifting further away with a radial velocity of 3.9 km/s. [3]

Contents

29 Cam A

29 Cam A has a classification of A4IV-V, which suggests that this star is beginning to evolve off the main sequence. Zorec et al. models it as a star that has completed 90.6% of the main sequence, which correlates to an age of 380 million years. [6] 29 Cam now has 2.47 the mass of the Sun, [6] and 3.49 times its radius. [7] It radiates at 58.9 times the luminosity of the Sun from an effective temperature of 8,337 K, [6] which gives it a white hue of an A-type star. 29 Cam spins rapidly at a projected rotational velocity of 123 km/s despite its evolved state.

29 Cam B

29 Cam has a companion designated BD+56 1065B, which is a 10 magnitude star. According to the proper motion, this star is unrelated to the primary, and is four times further than the primary. [13] The companion is relatively cooler and less luminous than the primary.

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  2. 1 2 3 4 Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89: 415–419. Bibcode:1991A&AS...89..415O. ISSN   0365-0138.
  3. 1 2 Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode:1953GCRV..C......0W.
  4. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN   1063-7737. S2CID   119257644.
  5. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  6. 1 2 3 4 5 6 7 Zorec, J.; Royer, F. (1 January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv: 1201.2052 . Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN   0004-6361. S2CID   55586789.
  7. 1 2 Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara (October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . hdl: 1721.1/124721 . ISSN   0004-6256. S2CID   166227927.
  8. ↑ Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, G.; Monari, G.; Cantat-Gaudin, T. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765 . ISSN   0004-6361.
  9. ↑ Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (October 2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy and Astrophysics. 393: 897–911. arXiv: astro-ph/0205255 . Bibcode:2002A&A...393..897R. doi: 10.1051/0004-6361:20020943 . ISSN   0004-6361.
  10. ↑ Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . hdl: 1721.1/124721 . ISSN   0004-6256. S2CID   166227927.
  11. 1 2 3 Gaia Collaboration; Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; Babusiaux, C.; Bailer-Jones, C. A. L.; Biermann, M.; Evans, D. W.; Eyer, L.; Jansen, F. (2018-08-01). "Gaia Data Release 2. Summary of the contents and survey properties". Astronomy and Astrophysics. 616: A1. arXiv: 1804.09365 . Bibcode:2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051 . ISSN   0004-6361.
  12. ↑ Glebocki, R.; Gnacinski, P. (2005-03-01). "Systematic errors in the determination of stellar rotational velocities". 13th Cambridge Workshop on Cool Stars. 560: 571. Bibcode:2005ESASP.560..571G.
  13. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001-12-01). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . ISSN   0004-6256. S2CID   119533755.


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