HD 31134

Last updated
HD 31134
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 31134 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 56m 07.07238s [1]
Declination +52° 52′ 11.0544″ [1]
Apparent magnitude  (V)5.74±0.01 [2]
Characteristics
Evolutionary stage main sequence star [3]
Spectral type A2 Vs [4] or A1 Vp [5]
U−B color index +0.11 [2]
B−V color index +0.09 [2]
Astrometry
Radial velocity (Rv)−15.1±2.5 [6]  km/s
Proper motion (μ)RA: −3.418  mas/yr [1]
Dec.: +14.954  mas/yr [1]
Parallax (π)6.8897 ± 0.1144  mas [1]
Distance 473 ± 8  ly
(145 ± 2  pc)
Absolute magnitude  (MV)+0.19 [7]
Details
Mass 2.74±0.05 [3]   M☉
Radius 4.38±0.22 [8]   R☉
Luminosity 103+13
−11 [3]   L☉
Surface gravity (log g)3.85 [9]   cgs
Temperature 8,690 [9]   K
Metallicity [Fe/H]−0.11 [10]   dex
Rotational velocity (v sin i)60±1 [11]  km/s
Age 432 [12]   Myr
Other designations
AG+52°472, BD+52°898, GC  5988, HD  31134, HIP  22936, HR  1561, SAO  24919 [13]
Database references
SIMBAD data

HD 31134, also designated as HR 1561, is a solitary star [14] 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. [2] Gaia DR3 parallax measurements place it 473 light years away. [1] It appears to be approaching the Solar System with a heliocentric radial velocity of −15.1  km/s . [6] At its current distance, HD 31134's brightness is diminished by 0.35 magnitudes due to interstellar dust. [15] It has an absolute magnitude of +0.19. [7]

The object has a stellar classification of A2 Vs, [4] indicating that it is an A-type main-sequence star with sharp or narrow absorption lines due to slow rotation. Two sources remove the s prefix and instead list it as an ordinary dwarf star [16] [17] while one lists it as a more evolved giant star. [18] Abt and Morell (1995) list it as a slightly hotter peculiar Ap star, [5] but it is now considered unlikely to be chemically peculiar. [19] It has 2.74 times the mass of the Sun and an enlarged radius of 4.38  R☉. [8] It radiates 103 times the luminosity of the Sun [3] from its photosphere at an effective temperature of 8,690  K . [9] HD 31134 is a rather evolved star, having completed 97.6% of its main sequence lifetime [3] at the age of 432 million years. [12] Consistent with its spectrum, it spins modestly with a projected rotational velocity of 60  km/s . [11]

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<span class="mw-page-title-main">34 Leonis Minoris</span> Star in the constellation Leo Minor

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<span class="mw-page-title-main">HD 176425</span> A-type dwarf; Corona Australis

HD 176425, also known as HR 7177 or rarely 38 G. Coronae Australis, is a solitary, bluish-white hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 6.21, placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 358 light-years, and it is currently drifting closer with a heliocentric radial velocity of −12.8 km/s. At its current distance, HD 176425's brightness is diminished by an interstellar extinction factor of 0.27 magnitudes and it has an absolute magnitude of +0.75.

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

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<span class="mw-page-title-main">HD 28780</span> A-type star in the constellation Camelopardalis

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<span class="mw-page-title-main">HD 21819</span> A-type main-sequence star; Camelopardalis

HD 21819, also designated as HR 1073, is a solitary star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.97, making faintly visible to the naked eye under ideal conditions. The object is located relatively close at a distance of 248 light-years based on Gaia DR3 parallax measurements and it is drifting closer with a heliocentric radial velocity of −6.5 km/s. At its current distance, HD 21819's brightness is diminished by an interstellar extinction of 0.17 magnitudes and it has an absolute magnitude of +1.62.

References

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  2. 1 2 3 4 Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89: 415. Bibcode:1991A&AS...89..415O. ISSN   0365-0138.
  3. 1 2 3 4 5 Zorec, J.; Royer, F. (January 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 . eISSN   1432-0746. ISSN   0004-6361. S2CID   55586789.
  4. 1 2 Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal. 74: 375. Bibcode:1969AJ.....74..375C. doi: 10.1086/110819 . ISSN   0004-6256.
  5. 1 2 Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi: 10.1086/192182 . ISSN   0067-0049.
  6. 1 2 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. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
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  8. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". 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.
  9. 1 2 3 Philip, A. G. D.; Egret, D. (May 1980). "An analysis of the Hauck-Mermillod catalogue of homogeneous four-color data. II". Astronomy and Astrophysics Supplement Series. 40: 199–205. Bibcode:1980A&AS...40..199P. ISSN   0365-0138.
  10. ↑ 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.
  11. 1 2 Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (October 2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy & Astrophysics. 393 (3): 897–911. arXiv: astro-ph/0205255 . Bibcode:2002A&A...393..897R. doi: 10.1051/0004-6361:20020943 . eISSN   1432-0746. ISSN   0004-6361.
  12. 1 2 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 . eISSN   1562-6873. ISSN   1063-7737.
  13. ↑ "HR 1561". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved January 3, 2023.
  14. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 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 . eISSN   1365-2966. ISSN   0035-8711. S2CID   14878976.
  15. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711.
  16. ↑ Appenzeller, Immo (April 1967). "MK Spectral Types for 185 Bright Stars". Publications of the Astronomical Society of the Pacific. 79 (467): 102. Bibcode:1967PASP...79..102A. doi: 10.1086/128449 . eISSN   1538-3873. ISSN   0004-6280.
  17. ↑ Cucchiaro, A.; Macau-Hercot, D.; Jaschek, M.; Jaschek, C. (July 1978). "Spectral classification from the ultraviolet line features of S2/68 spectra. III. Early A-type stars". Astronomy and Astrophysics Supplement Series. 33: 15–26. Bibcode:1978A&AS...33...15C. ISSN   0365-0138.
  18. ↑ Palmer, D. R.; Walker, E. N.; Jones, D. H. P.; Wallis, R. E. (1968). "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars". Royal Greenwich Observatory Bulletins. 135: 385. Bibcode:1968RGOB..135..385P.
  19. ↑ Renson, P.; Manfroid, J. (19 March 2009). "Catalogue of Ap, HgMn and Am stars". Astronomy & Astrophysics. 498 (3): 961–966. Bibcode:2009A&A...498..961R. doi: 10.1051/0004-6361/200810788 . eISSN   1432-0746. ISSN   0004-6361.
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