16 Camelopardalis

16 Camelopardalis is a single[10] star in the northern circumpolar constellation Camelopardalis,[9] located 348 light years away from the Sun as determined from parallax measurements.[1] It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.28.[2] This object is moving further from the Earth with a heliocentric radial velocity of around 12 km/s.[5]

16 Camelopardalis
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension  05h 23m 27.84195s[1]
Declination +57° 32′ 39.8364″[1]
Apparent magnitude (V) 5.28[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A0Vn[4]
U−B color index −0.07[2]
B−V color index −0.03[2]
Astrometry
Radial velocity (Rv)12.0±3.7[5] km/s
Proper motion (μ) RA: +15.396[1] mas/yr
Dec.: −54.447[1] mas/yr
Parallax (π)9.3655 ± 0.1506[1] mas
Distance348 ± 6 ly
(107 ± 2 pc)
Absolute magnitude (MV)0.18[6]
Details
Mass2.80±0.04[3] M☉
Radius3.26[7] R☉
Luminosity96.6+7.2
−6.6[3] L☉
Temperature9,748+92
−87[3] K
Rotational velocity (v sin i)217[8] km/s
Age400[7] Myr
Other designations
16 Cam, BD+57°879, FK5 2402, HD 34787, HIP 25197, HR 1751, SAO 25161, WDS J05235+5733A[9]
Database references
SIMBADdata

This is an A-type main-sequence star with a stellar classification of A0 Vn,[4] where the 'n' notation indicates "nebulous" lines due to rapid rotation. In the past it was misidentified as a Lambda Boötis star.[11] It is around 400[7] million years old and is spinning with a projected rotational velocity of 217 km/s.[8] The star has 2.8[3] times the mass of the Sun and 3.3[7] times the Sun's radius. It is radiating 97[3] times the Sun's luminosity from its photosphere at an effective temperature of 9,748 K.[3]

An infrared excess indicates it has a dusty debris disk with a mean temperature of 120 K orbiting at a distance of 52 AU from the star. This disk has a combined mass equal to 2.1% the mass of the Earth.[7]

References
  1. 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. Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode:1983A&AS...52..131O
  3. Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
  4. Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
  5. Kharchenko, N. V.; et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten, 328 (9): 889–896, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776
  6. Huang, W.; et al. (2012), "A catalogue of Paschen-line profiles in standard stars", Astronomy & Astrophysics, 547: A62, arXiv:1210.7893, Bibcode:2012A&A...547A..62H, doi:10.1051/0004-6361/201219804.
  7. Rhee, Joseph H.; et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal, 660 (2): 1556–1571, arXiv:astro-ph/0609555, Bibcode:2007ApJ...660.1556R, doi:10.1086/509912
  8. Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224
  9. "16 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-16.
  10. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  11. Gerbaldi, M.; Faraggiana, R.; Lai, O. (December 2003), "The heterogeneous class of lambda Bootis stars", Astronomy and Astrophysics, 412: 447–464, Bibcode:2003A&A...412..447G, doi:10.1051/0004-6361:20031472.
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