HD 29678

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HD 29678
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 29678 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis [1]
Right ascension 04h 48m 50.35317s [2]
Declination +75° 56′ 28.3916″ [2]
Apparent magnitude  (V)5.95±0.01 [3]
Characteristics
Evolutionary stage main sequence [2]
Spectral type A9/F0 IV [4] or A6 V [5]
U−B color index −0.04 [6]
B−V color index +0.27 [6]
Astrometry
Radial velocity (Rv)−6.0±3.7 [7] km/s
Proper motion (μ)RA: +37.476 mas/yr [2]
Dec.: −133.853 mas/yr [2]
Parallax (π)21.0142±0.0265  mas [2]
Distance 155.2 ± 0.2  ly
(47.59 ± 0.06  pc)
Absolute magnitude  (MV)+2.60 [1]
Details
Mass 1.54 [8]   M☉
Radius 1.73±0.09 [9]   R☉
Luminosity 7.54+0.04
−0.06 [2]   L☉
Surface gravity (log g)4.20+0.09
−0.07 [10]   cgs
Temperature 7,502±255 [8]   K
Metallicity [Fe/H]−0.26 [11]   dex
Rotational velocity (v sin i)120 [12]  km/s
Age 146 [8]   Myr
Other designations
AG+75°168, BD+75°189, FK5 173, GC 5774, HD 29678, HIP 22361, HR 1491, SAO 5309, CCDM J04489+7557A, WDS J04488+7556A, TIC 140682376 [13]
Database references
SIMBAD data

HD 29678, also known as HR 1491, is a solitary star [14] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as a yellowish-white hued point of light with an apparent magnitude of 5.95. [3] The object is located relatively close at a distance of 155 light-years [2] and it is drifting closer with a somewhat constrained heliocentric radial velocity of approximately −6.0  km/s . [7] At is current distance, HD 29678's brightness is diminished by 0.13 magnitudes due to interstellar extinction and it has an absolute magnitude of +2.60. [1] Its observed kinematics suggest that it is a member of the Pleiades supercluster. [15]

HD 29678 has a stellar classification of A9/F0 IV, [4] indicating that it is a slightly evolved star that has the characteristics of an A9 and F0 subgiant. Adams et al. (1935) yields a class of A6 V, [5] indicating that it is instead a hotter A-type main-sequence star that is generating energy via hydrogen fusion at is core. It has 1.54 times the mass of the Sun [8] and 1.73 times the radius of the Sun. [9] It radiates 7.54 times the luminosity of the Sun [2] from its photosphere at an effective temperature of 7,502  K . [8] The above characteristics more closely match a main sequence star and Gaia DR3 models the object as such. [2] HD 29678 is metal-deficient with an iron abundance of [Fe/H] = −0.26 or 55% of the Sun's [11] and it is estimated to be 146 million years old. [8] Like many hot stars it spins rapidly, having a projected rotational velocity of 120  km/s . [12]

HD 29678 has a 13th magnitude optical companion located 98.6" away along a position angle of 46°. [16] HD 29678 itself is an unrelated field star of the HIP 21974 cluster. [17]

References

  1. 1 2 3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 9 10 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 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. S2CID   17128864.
  4. 1 2 Cowley, A. P. (April 1976). "Spectral classification of the bright F stars". Publications of the Astronomical Society of the Pacific. 88: 95. Bibcode:1976PASP...88...95C. doi: 10.1086/129905 . eISSN   1538-3873. ISSN   0004-6280.
  5. 1 2 Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi: 10.1086/143628 . eISSN   1538-4357. ISSN   0004-637X. S2CID   121056016.
  6. 1 2 Imagawa, Fumihiko (February 1967). "Observational Results of Three-color Photometry for F-type Stars (II)". Memoirs of the College of Science, University of Kyoto. Series A. 31 (2): 93–100.
  7. 1 2 Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 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. eISSN   1521-3994. ISSN   0004-6337. S2CID   119323941.
  8. 1 2 3 4 5 6 David, Trevor J.; Hillenbrand, Lynne A. (12 May 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. arXiv: 1501.03154 . Bibcode:2015ApJ...804..146D. doi: 10.1088/0004-637X/804/2/146 . eISSN   1538-4357. S2CID   33401607.
  9. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180 . Bibcode:2004A&A...426..297K. doi: 10.1051/0004-6361:20035930 . eISSN   1432-0746. ISSN   0004-6361. S2CID   6077801.
  10. ↑ 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 . eISSN   1538-3881. hdl: 1721.1/124721 . S2CID   166227927.
  11. 1 2 Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765 . eISSN   1432-0746. ISSN   0004-6361. S2CID   131780028.
  12. 1 2 Danziger, I. J.; Faber, S. M. (May 1972). "Rotation of evolving A and F stars". Astronomy and Astrophysics. 18: 428. Bibcode:1972A&A....18..428D. ISSN   0004-6361. S2CID   118592077.
  13. ↑ "HD 29678". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved November 13, 2023.
  14. ↑ De Rosa, R. J.; et al. (26 November 2013). "The VAST Survey – III. The multiplicity of A-type stars within 75 pc". Monthly Notices of the Royal Astronomical Society. 437 (2): 1216–1240. arXiv: 1311.7141 . Bibcode:2014MNRAS.437.1216D. doi: 10.1093/mnras/stt1932 . eISSN   1365-2966. ISSN   0035-8711. S2CID   88503488.
  15. ↑ Eggen, Olin J. (April 1992). "The Pleiades supercluster in FK 5". The Astronomical Journal. 103. American Astronomical Society: 1302. Bibcode:1992AJ....103.1302E. doi: 10.1086/116142 . ISSN   0004-6256. S2CID   120439628.
  16. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "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.
  17. ↑ Cantat-Gaudin, T.; Jordi, C.; Vallenari, A.; Bragaglia, A.; Balaguer-Núñez, L.; Soubiran, C.; Bossini, D.; Moitinho, A.; Castro-Ginard, A.; Krone-Martins, A.; Casamiquela, L.; Sordo, R.; Carrera, R. (October 2018). "A Gaia DR2 view of the open cluster population in the Milky Way". Astronomy & Astrophysics. 618: A93. arXiv: 1805.08726 . Bibcode:2018A&A...618A..93C. doi: 10.1051/0004-6361/201833476 . ISSN   0004-6361. S2CID   56245426.
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