HD 33266

HD 33266 (HR 1675) is a solitary star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 6.17, making it faintly visible to the naked eye. Located 481 light years away, it is approaching the Sun with a heliocentric radial velocity of −4.4 km/s.

HD 33266

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Camelopardalis
Right ascension	05h 13m 02.8149s[1]
Declination	+61° 51′ 00.1463″[1]
Apparent magnitude (V)	6.17±0.01[2]
Characteristics
Evolutionary stage	main sequence[3]
Spectral type	A2 Vam[note 1]
U−B color index	+0.08[4]
B−V color index	+0.04[4]
Astrometry
Radial velocity (Rv)	−4.4±2.9[5] km/s
Proper motion (μ)	RA: −12.154 mas/yr[1] Dec.: +2.135 mas/yr[1]
Parallax (π)	6.7795 ± 0.0364 mas[1]
Distance	481 ± 3 ly (147.5 ± 0.8 pc)
Absolute magnitude (MV)	+0.58[6]
Details
Mass	2.45+0.32 −0.34[7] M☉
Radius	3.14±0.08[7] R☉
Luminosity	49.7[8] L☉
Surface gravity (log g)	3.83+0.07 −0.06[7] cgs
Temperature	8,952[8] K
Metallicity [Fe/H]	0.00[9] dex
Rotational velocity (v sin i)	15±1[10] km/s
Age	340[9] Myr
Other designations
AG+61°422, BD+61°766, GC 6345, HD 33266, HIP 24313, HR 1675, SAO 13409
Database references
SIMBAD	data

HD 33266 is an A-type star with 2.45 times the mass of the Sun and 3.14 times the radius of the Sun.^[7] It shines at 49.7 L_☉ from its photosphere at an effective temperature of 8,952 K,^[8] giving it a white glow. Due to HD 33266 being an Am star,^[3] it spins slowly with a projected rotational velocity of 15 km/s^[10] at an age of 340 million years.^[9] Its metallicity − elements heavier than helium − is at solar level.^[9]

Note

1. Despite it being referenced as either A2 III or IV, this is actually an Am main sequence star.

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
3. Çalışkan, Şeyma; Kılıçoğlu, Tolgahan; Elmaslı, Aslı; Nasolo, Yahya; Avcı, Zeynep; Albayrak, Berahitdin (January 2015). "Chemical abundance analysis of the A-type stars CP Cyg and HD 33266". New Astronomy. 34: 6–10. Bibcode:2015NewA...34....6C. doi:10.1016/j.newast.2014.05.001. ISSN 1384-1076.
4. Mermilliod, J. -C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data: 0. Bibcode:1986EgUBV........0M.
5. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
6. 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.
7. Stassun, Keivan G.; et al. (9 September 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. ISSN 0004-6256.
8. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
9. Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. ISSN 0320-0108. S2CID 255201789.
10. Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (October 2002). "Rotational velocities of A-type stars: II. Measurement of ${v\sin i}$ in the northern hemisphere". Astronomy & Astrophysics. 393 (3): 897–911. arXiv:astro-ph/0205255. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. ISSN 0004-6361.