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
Right ascension 04h 48m 50.35317s [1]
Declination +75° 56′ 28.3916″ [1]
Apparent magnitude  (V)5.95±0.01 [2]
Characteristics
Evolutionary stage main sequence star [1]
Spectral type A9/F0 IV [3] or A6 V [4]
U−B color index −0.04 [5]
B−V color index +0.27 [5]
Astrometry
Radial velocity (Rv)−6.0±3.7 [6]  km/s
Proper motion (μ)RA: +37.476  mas/yr [1]
Dec.: −133.853  mas/yr [1]
Parallax (π)21.0142 ± 0.0265  mas [1]
Distance 155.2 ± 0.2  ly
(47.59 ± 0.06  pc)
Absolute magnitude  (MV)+2.60 [7]
Details
Mass 1.54 [8]   M☉
Radius 1.73±0.09 [9]   R☉
Luminosity 7.54+0.04
−0.06 [1]   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. [2] The object is located relatively close at a distance of 155 light-years [1] and it is drifting closer with a somewhat constrained heliocentric radial velocity of approximately −6.0  km/s . [6] 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. [7] Its observed kinematics suggest that it is a member of the Pleiades supercluster. [15]

HD 29678 has a stellar classification of A9/F0 IV, [3] 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, [4] 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 [1] 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. [1] 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]

Related Research Articles

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<span class="mw-page-title-main">HD 24479</span> Star in the constellation Camelopardalis

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<span class="mw-page-title-main">HD 203842</span> Star in the constellation Equuleus

HD 203842, also known as HR 8191 or rarely 30 G. Equueli, is a solitary, yellowish-white hued star located in the constellation Equuleus. It has an apparent magnitude of 6.32, placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 374 light years, and it is currently drifting closer with a somewhat constrained heliocentric radial velocity of −21.8 km/s. At its current distance HD 203842's brightness is diminished by 0.15 magnitudes due to interstellar dust and it has an absolute magnitude of +1.06.

<span class="mw-page-title-main">HD 90132</span> Solitary White-hued star and high proper motion star

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<span class="mw-page-title-main">HD 26764</span> Star in the constellation Camelopardalis

HD 26764, also known as HR 1314 or rarely 14 H. Camelopardalis, is a solitary white hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.19, making it faintly to the naked eye if viewed under good conditions. Gaia DR3 parallax measurements place the object at a distance of 266 light years and is drifting closer with a poorly constrained heliocentric radial velocity of 3 km/s. At its current distance, HD 26764's brightness is diminished by 0.26 magnitudes due to interstellar dust.

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<span class="mw-page-title-main">HD 27022</span> Star in the constellation Camelopardalis

HD 27022, also known as HR 1327, is a star located in the northern circumpolar constellation Camelopardalis. The object has also been designated as 20 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.27, allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the star has been estimated to be 347 light years away. It appears to be approaching the Solar System, having a heliocentric radial velocity of −19.5 km/s.

<span class="mw-page-title-main">Phi Octantis</span> Star in the constellation Octans

Phi Octantis, Latinized from φ Octantis, is a solitary star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.46, making it faintly visible to the naked eye if viewed under ideal conditions. The object is located relatively close at a distance of 194 light years based on Gaia DR3 parallax measurements, but it is receding with a heliocentric radial velocity of approximately 5 km/s. At its current distance, Phi Octantis' brightness is diminished by 0.26 magnitudes due to interstellar extinction and it has an absolute magnitude of +1.60.

HD 64307, also known as HR 3075, is a solitary, orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.35, allowing it to be faintly seen with the naked eye. Based on parallax measurements from the Gaia spacecraft, The object is estimated to be 690 light years distant. It appears to be receding from the Sun, having a heliocentric radial velocity of 34 km/s.

HD 46815 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.

HD 193373 is a solitary red hued star located in the equatorial constellation Delphinus. It has an apparent magnitude of 6.21, placing it near the limit for naked eye visibility. Parallax measurements place it 846 light years distant and it is currently receding with a heliocentric radial velocity of 22.7 km/s.

<span class="mw-page-title-main">HD 36187</span> Star in the constellation of Columba

HD 36187, also known as HR 1835, is a solitary, bluish-white hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.55, making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements from the Gaia spacecraft, it is estimated to be 282 light years away from the Solar System. However, it is receding rapidly with a heliocentric radial velocity of 50 km/s. At its current distance, HD 36187's brightness is diminished by 0.21 magnitude due to interstellar dust.

<span class="mw-page-title-main">HD 22764</span> Double star; Camelopardalis

HD 22764, also known as HR 1112, is an orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.78, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of approximately 1,770 light years based on Gaia DR3 parallax measurements but is approaching the Solar System with a heliocentric radial velocity of −12.5 km/s. At its current distance, HD 22764's brightness is diminished by 0.66 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 31134</span> Star in the constellation of Camelopardalis

HD 31134, also designated as HR 1561, is a solitary star located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued star with an apparent magnitude of 5.74. Gaia DR3 parallax measurements place it 473 light years away. It appears to be approaching the Solar System with a heliocentric radial velocity of −15.1 km/s. At its current distance, HD 31134's brightness is diminished by 0.35 magnitudes due to interstellar dust. It has an absolute magnitude of +0.19.

<span class="mw-page-title-main">HD 187420/187421</span> Binary star in the constellation Telescopium

HD 187420 and HD 187421, are the components of a binary star located in the southern constellation Telescopium. Gaia DR3 parallax measurements place the stars at a distance of 407 and 414 light years respectively. The two are separated by 23″, and they are approaching the Solar System with heliocentric radial velocities of −17.9 km/s and −21.5 km/s respectively.

<span class="mw-page-title-main">HD 24141</span> Am star?; Camelopardalis

HD 24141, also known as HR 1192, is a star located in the northern constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.79. The object is located relatively close at a distance of 176 light-years based on Gaia DR3 parallax measurements and it is slowly drifting closer with a heliocentric radial velocity of −0.2 km/s. At its current distance, HD 24141's brightness is diminished by 0.17 magnitudes due to interstellar extinction and it has an absolute magnitude of +2.28.

<span class="mw-page-title-main">HD 27322</span> A-type dwarf; Camelopardalis

HD 27322, also known as HR 1342, is a binary star located in the northern circumpolar constellation Camelopardalis. The visible component is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.92. The object is located relatively close at a distance of 313 light-years based on Gaia DR3 parallax measurements, and it is drifting closer with a heliocentric radial velocity of approximately −13 km/s. At its current distance, HD 27322's brightness is diminished by 0.24 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.98.

HD 181295 is a star located in the southern constellation Telescopium. It has an apparent magnitude of 6.42, placing it near the limit of naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of approximately 252 light-years based on Gaia DR3 parallax measurements, and it is currently drifting closer with a heliocentric radial velocity of −35.7 km/s. At its current distance, HD 181295's brightness is diminished by 0.22 magnitudes due to interstellar extinction and it has an absolute magnitude +2.14.

References

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  2. 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.
  3. 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.
  4. 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.
  5. 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.
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  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. American Astronomical Society. 103: 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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