HD 28454

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HD 28454
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Caelum
Right ascension 04h 27m 05.9650s[1]
Declination −46° 56′ 50.9734″[1]
Apparent magnitude (V) 6.10[2]
Characteristics
Spectral type F5.5 V[3]
U−B color index –0.07[4]
B−V color index +0.48[4]
Astrometry
Radial velocity (Rv)21.84 ± 1.66[1] km/s
Proper motion (μ) RA: 63.618[1] mas/yr
Dec.: –270.385[1] mas/yr
Parallax (π)30.5444 ± 0.0392[1] mas
Distance106.8 ± 0.1 ly
(32.74 ± 0.04 pc)
Absolute magnitude (MV)+3.5[2]
Details
Mass1.21[5] M☉
Radius1.47 ± 0.05[1] R☉
Luminosity3.18 ± 0.01[1] L☉
Surface gravity (log g)4.30 ± 0.14[6] cgs
Temperature6,365+109
−134[1] K
Metallicity [Fe/H]–0.25 ± 0.10[7] dex
Rotational velocity (v sin i)8[8] km/s
Age2.09[5] Gyr
Other designations
3 G. Caeli, CD–47°1383, HD 28454, HIP 20781, HR 1418, SAO 216809
Database references
SIMBADdata

HD 28454 (HR 1418) is a solitary star located in the southern constellation Caelum. With an apparent magnitude of 6.1,[2] its barely visble to the naked eye under ideal conditions. This star is located relatively close at a distance of about 107 light years, but is drifting away at a rate of 21.84 km/s.[1]

HD 28454 is an ordinary F-type main sequence star with 1.21 times the mass of the Sun[5] and 1.47 times the radius of the Sun.[1] It radiates at 3.18 times the luminosity of the Sun from its photosphere at an effective temperature of 6,365 K,[1] which gives the star a yellow-white hue. Despite the star's young age at 2.09 billion years,[5] it has an iron abundance only 56% that of the Sun,[7] and spins modestly with a projected rotational velocity of 8 km/s.[8]

References[]

  1. ^ a b c d e f g h i j k l 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. ^ a b c Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1562-6873. S2CID 119257644.
  3. ^ 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. (July 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. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
  4. ^ a b Mermilliod, J. -C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data: 0. Bibcode:1986EgUBV........0M.
  5. ^ a b c d Bressan, Alessandro; Marigo, Paola; Girardi, Léo; Salasnich, Bernardo; Dal Cero, Claudia; Rubele, Stefano; Nanni, Ambra (21 November 2012). "parsec : stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code: parsec : tracks and isochrones". Monthly Notices of the Royal Astronomical Society. 427 (1): 127–145. arXiv:1208.4498. Bibcode:2012MNRAS.427..127B. doi:10.1111/j.1365-2966.2012.21948.x. ISSN 1365-2966.
  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. ISSN 1538-4357.
  7. ^ a b Netopil, Martin (August 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. ISSN 1365-2966.
  8. ^ a b Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (May 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of ~14 000 F and G dwarfs". Astronomy & Astrophysics. 418 (3): 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959. ISSN 1432-0746.
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