Astronomy:HD 32820

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Short description: Star in the constellation of Caelum
HD 32820
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Caelum
Right ascension  05h 03m 53.95236s[1]
Declination −41° 44′ 41.8259″[1]
Apparent magnitude (V) 6.30±0.01[2]
Characteristics
Spectral type F8 V[3][4]
U−B color index +0.04[5]
B−V color index +0.53[5]
Astrometry
Radial velocity (Rv)29.8±0.9[6] km/s
Proper motion (μ) RA: +22.005[1] mas/yr
Dec.: +158.650[1] mas/yr
Parallax (π)31.6204 ± 0.0176[1] mas
Distance103.15 ± 0.06 ly
(31.63 ± 0.02 pc)
Absolute magnitude (MV)+3.79[7]
Details
Mass1.25[8] M☉
Radius1.33±0.03[9] R☉
Luminosity2.44±0.01[1] L☉
Surface gravity (log g)4.25[10] cgs
Temperature6,227±68[9] K
Metallicity [Fe/H]−0.04[11] dex
Rotational velocity (v sin i)8[12] km/s
Age3.46[11] Gyr
Other designations
CD−41°1690, CPD−41°621, GC 6204, HD 32820, HIP 23555, HR 1651, SAO 217153[13]
Database references
SIMBADdata

HD 32820, also known as HR 1651, is a yellowish-white hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 6.3,[2] placing it near the limit of naked eye visibility. The object is located relatively close at a distance of 103 light years based on parallax measurements from Gaia DR3,[1] but is receding with a heliocentric radial velocity of 29.8 km/s.[6]

HD 32820 has a stellar classification of F8 V,[3][4] indicating that it is an ordinary F-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 125% the mass of the Sun[8] and 133% of its radius.[9] It radiates double the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,227 K.[9] HD 32820 is said to be 3.46 billion years old,[11] slightly younger than the Sun, and has a near solar iron abundance.[11] The star spins modestly with a projected rotational velocity of 8 km/s[12] and is chromospherically inactive[14]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 Malaroda, S. (August 1975). "Study of the F-type 1 MK spectral types.". The Astronomical Journal 80: 637. doi:10.1086/111786. ISSN 0004-6256. Bibcode: 1975AJ.....80..637M. 
  4. ↑ 4.0 4.1 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal 132 (1): 161–170. doi:10.1086/504637. ISSN 0004-6256. Bibcode: 2006AJ....132..161G. 
  5. ↑ 5.0 5.1 Cousins, A. W. J.; Lagerwey, H.C.; Shillington, F. A.; Stobie, R. S. (1969). "Photometry of Three δ Scuti Variables". Monthly Notes of the Astronomical Society of Southern Africa 28: 25. ISSN 0024-8266. Bibcode: 1969MNSSA..28...25C. 
  6. ↑ 6.0 6.1 Steinmetz, Matthias et al. (27 July 2020). "The Sixth Data Release of the Radial Velocity Experiment (Rave). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances". The Astronomical Journal 160 (2): 83. doi:10.3847/1538-3881/ab9ab8. Bibcode: 2020AJ....160...83S. 
  7. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  8. ↑ 8.0 8.1 Mortier, A.; Santos, N. C.; Sousa, S.; Israelian, G.; Mayor, M.; Udry, S. (March 2013). "On the functional form of the metallicity-giant planet correlation". Astronomy & Astrophysics 551: A112. doi:10.1051/0004-6361/201220707. ISSN 0004-6361. Bibcode: 2013A&A...551A.112M. 
  9. ↑ 9.0 9.1 9.2 9.3 Masana, E.; Jordi, C.; Ribas, I. (10 April 2006). "Effective temperature scale and bolometric corrections from 2MASS photometry". Astronomy & Astrophysics 450 (2): 735–746. doi:10.1051/0004-6361:20054021. ISSN 0004-6361. Bibcode: 2006A&A...450..735M. 
  10. ↑ 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. ISSN 0004-6361. Bibcode: 1999A&A...352..555A. 
  11. ↑ 11.0 11.1 11.2 11.3 Ibukiyama, A.; Arimoto, N. (21 October 2002). "HIPPARCOS age-metallicity relation of the solar neighbourhood disc stars". Astronomy & Astrophysics 394 (3): 927–941. doi:10.1051/0004-6361:20021157. ISSN 0004-6361. Bibcode: 2002A&A...394..927I. 
  12. ↑ 12.0 12.1 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (16 April 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood". Astronomy & Astrophysics 418 (3): 989–1019. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N. 
  13. ↑ "HD 28454". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+28454. 
  14. ↑ Pace, G. (22 February 2013). "Chromospheric activity as age indicator". Astronomy & Astrophysics 551: L8. doi:10.1051/0004-6361/201220364. ISSN 0004-6361. Bibcode: 2013A&A...551L...8P. 
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