Astronomy:16 Camelopardalis

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Short description: A-type main sequence star in the constellation Camelopardalis
16 Camelopardalis
Observation data
Equinox J2000.0]] (ICRS)
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

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]

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. Jump up to: 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. Bibcode2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. Jump up to: 2.0 2.1 2.2 2.3 Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series 52: 131–134, Bibcode1983A&AS...52..131O 
  3. Jump up to: 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode2012A&A...537A.120Z. 
  4. Jump up to: 4.0 4.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode1969AJ.....74..375C 
  5. Jump up to: 5.0 5.1 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, doi:10.1002/asna.200710776, Bibcode2007AN....328..889K 
  6. Huang, W. et al. (2012), "A catalogue of Paschen-line profiles in standard stars", Astronomy & Astrophysics 547: A62, doi:10.1051/0004-6361/201219804, Bibcode2012A&A...547A..62H. 
  7. Jump up to: 7.0 7.1 7.2 7.3 7.4 Rhee, Joseph H. et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal 660 (2): 1556–1571, doi:10.1086/509912, Bibcode2007ApJ...660.1556R 
  8. Jump up to: 8.0 8.1 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, doi:10.1051/0004-6361:20065224, Bibcode2007A&A...463..671R 
  9. Jump up to: 9.0 9.1 "16 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=16+Cam. 
  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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode2008MNRAS.389..869E. 
  11. Gerbaldi, M.; Faraggiana, R.; Lai, O. (December 2003), "The heterogeneous class of lambda Bootis stars", Astronomy and Astrophysics 412 (2): 447–464, doi:10.1051/0004-6361:20031472, Bibcode2003A&A...412..447G. 

External links