29 Camelopardalis (29 Cam) is a double star in the circumpolar constellation Camelopardalis. With an apparent magnitude of 6.59,[2] it's 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]
| 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☉ |
| Luminosity | 15.043[11] L☉ |
| Temperature | 7911[11] K |
| Rotational velocity (v sin i) | 110±8[12] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
29 Cam A
edit29 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] At present, 29 Cam 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
edit29 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 4 times farther than the primary.[13] The companion is relatively cooler and less luminous than the primary.
References
edit- ^ a b c d e f 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.
- ^ a b c d 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.
- ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode:1953GCRV..C......0W.
- ^ 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.
- ^ a b c 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.
- ^ a b c d e f g 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.
- ^ a b 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ a b c 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.
- ^ 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.
- ^ 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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