HD 89571

Last updated
HD 89571
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 10h 29m 41.6297s [1]
Declination +84° 15′ 06.949″ [1]
Apparent magnitude  (V)5.51±0.01 [2]
Characteristics
Spectral type A9 V [3]
U−B color index +0.06 [2]
B−V color index +0.23 [2]
Astrometry
Radial velocity (Rv)3.5±2 [4]  km/s
Proper motion (μ)RA: −145.145  mas/yr [1]
Dec.: −21.494  mas/yr [1]
Parallax (π)23.0490 ± 0.3729  mas [1]
Distance 142 ± 2  ly
(43.4 ± 0.7  pc)
Absolute magnitude  (MV)+2.48 [5]
Orbit [6]
PrimaryA
CompanionB
Period (P)2.20±0.03 yr
Semi-major axis (a)0.0142±0.0006″
Eccentricity (e)0.26±0.11
Details
A
Mass 1.69 [7]   M☉
Radius 1.79 [1]   R☉
Luminosity 8.4 [8]   L☉
Surface gravity (log g)4.27 [9]   cgs
Temperature 7,535 [10]   K
Metallicity [Fe/H]+0.04 [11]   dex
Rotational velocity (v sin i)134±7 [10]  km/s
Age 710 [7]   Myr
B
Mass 0.38 [7]   M☉
Other designations
AG+84°229, BD+84°234, GC  14305, HD  89571, HIP  51384, HR  4062, SAO  1701, WDS J10297+8415AB
Database references
SIMBAD data

HD 89571 (HR 4062) is a binary star [12] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with a combined apparent magnitude of 5.51 [2] and is estimated to be 142 light years [1] away from the Solar System. However, it is receding with a heliocentric radial velocity of 3.5  km/s . [4]

The primary has a stellar classification of A9 V, [3] indicating that it is an ordinary A-type main-sequence star. David S. Evans gave it a slightly warmer class of A6 V [13] while Cowley et al. classified it as F0 IV, [14] indicating a F-type subgiant. Nevertheless, the two components take roughly 2 years to orbit each other at a mean separation of 14.2  mas . [6]

The components have masses of 1.69  M☉ and 0.38  M☉ , [7] with the latter being a probable M-type star. HD 89571 has a radius of 1.79  R☉ [1] and a luminosity of 8.4  L☉ . [8] This yields an effective temperature of 7,535  K , [10] giving a white hue. It is estimated to be 710 million years old [7] and spins rapidly with a projected rotational velocity of 134  km/s ; [10] it has a near solar metallicity, equating to an iron abundance 110% that of the Sun. [11]

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<span class="mw-page-title-main">42 Leonis Minoris</span> Star in the constellation Leo Minor

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<span class="mw-page-title-main">23 Leonis Minoris</span> Star in the constellation of Leo Minor

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<span class="mw-page-title-main">40 Leonis Minoris</span> Binary star system in the constellation of Leo Minor

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

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

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<span class="mw-page-title-main">HD 23005</span> Star in Camelopardlis

HD 23005, also known as HR 1124, is a soltiary, yellowish-white hued star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.78, making it faintly visible to the naked eye. The object is located relatively close at a distance of 173 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 4.9 km/s. At its current distance, HD 23005's brightness is diminished by 0.15 magnitudes due to extinction from interstellar dust. It has an absolute magnitude of +2.07.

References

  1. 1 2 3 4 5 6 7 8 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. 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 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.
  4. 1 2 Evans, D. S. (1967). "The Revision of the General Catalogue of Radial Velocities". International Astronomical Union . 30: 57. Bibcode:1967IAUS...30...57E.
  5. ↑ 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. S2CID   119257644.
  6. 1 2 Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (October 2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi: 10.1051/0004-6361/201219774 . eISSN   1432-0746. ISSN   0004-6361.
  7. 1 2 3 4 5 De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I.; Macintosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Thomas, S.; Lai, O. (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.
  8. 1 2 Chandler, Colin Orion; McDonald, Iain; Kane, Stephen R. (17 February 2016). "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars". The Astronomical Journal. 151 (3): 59. arXiv: 1510.05666 . Bibcode:2016AJ....151...59C. doi: 10.3847/0004-6256/151/3/59 . eISSN   1538-3881.
  9. ↑ Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv: astro-ph/9911002 . Bibcode:1999A&A...352..555A. ISSN   0004-6361.
  10. 1 2 3 4 Reiners, A. (January 2006). "Rotation- and temperature-dependence of stellar latitudinal differential rotation". Astronomy & Astrophysics. 446 (1): 267–277. arXiv: astro-ph/0509399 . Bibcode:2006A&A...446..267R. doi: 10.1051/0004-6361:20053911 . eISSN   1432-0746. ISSN   0004-6361.
  11. 1 2 Netopil, Martin (4 May 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society. 469 (3): 3042–3055. arXiv: 1705.00883 . Bibcode:2017MNRAS.469.3042N. doi: 10.1093/mnras/stx1077 . eISSN   1365-2966. ISSN   0035-8711.
  12. ↑ 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.
  13. ↑ Evans, D. S. (1966). "Fundamental data for Southern stars (6th list)". Royal Greenwich Observatory Bulletins. 110: 185. Bibcode:1966RGOB..110..185E.
  14. ↑ 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.
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