Astronomy:26 Camelopardalis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 46m 30.39025s[1] |
| Declination | +56° 06′ 56.0726″[1] |
| Apparent magnitude (V) | +5.93[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A4Vn[4] |
| B−V color index | +0.164±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +21.0±4.3[2] km/s |
| Proper motion (μ) | RA: +19.337±0.133[1] mas/yr Dec.: −58.838±0.134[1] mas/yr |
| Parallax (π) | 16.5077 ± 0.0696[1] mas |
| Distance | 197.6 ± 0.8 ly (60.6 ± 0.3 pc) |
| Absolute magnitude (MV) | 2.01[2] |
| Details | |
| Mass | 1.80±0.02[3] M☉ |
| Luminosity | 12.88+0.75 −0.71[3] L☉ |
| Surface gravity (log g) | 4.12[5] cgs |
| Temperature | 7,798±36[3] K |
| Metallicity [Fe/H] | −0.08[6] dex |
| Rotational velocity (v sin i) | 249[3] km/s |
| Age | 345[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
26 Camelopardalis is a single[8] star in the northern constellation of Camelopardalis, positioned next to the southern constellation boundary with Auriga. It is a suspected variable star[9] that is dimly visible to the naked eye with a peak apparent visual magnitude of +5.93.[2] This object is located at a distance of 197 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +21 km/s.[2]
This is a white-hued A-type main-sequence star with a stellar classification of A4Vn,[4] where the 'n' notation indicates "nebulous" absorption lines due to rapid rotation. It is an estimated 345[5] million years old and is spinning with a projected rotational velocity of 249 km/s.[3] The star has 1.80[3] times the mass of the Sun and is radiating 13 times the Sun's luminosity from its photosphere at an effective temperature of 7,798 K.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Zorec, J. et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 4.0 4.1 Cowley, A. et al. (1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 5.0 5.1 5.2 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ Netopil, Martin (August 2017), "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system", Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055, doi:10.1093/mnras/stx1077, Bibcode: 2017MNRAS.469.3042N.
- ↑ "HD 38091". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+38091.
- ↑ De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I. et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society 437 (2): 1216, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D.
- ↑ Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S.
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