HD 85725

HD 85725 (HR 3916) is a star in the constellation Antlia. It’s barely visible to the naked eye due to an apparent magnitude of 6.29.[2] Located around 175 light-years away, it is drifting away at a heliocentric radial velocity of 61.95 km/s.[5]

HD 85725
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 09h 52m 58.02763s[1]
Declination −27° 19′ 55.8219″[1]
Apparent magnitude (V) 6.28[2]
Characteristics
Spectral type G1 V[3]
B−V color index +0.62[4]
Astrometry
Radial velocity (Rv)61.95±0.34[5] km/s
Proper motion (μ) RA: −278.245[1] mas/yr
Dec.: +95.043[1] mas/yr
Parallax (π)18.5634 ± 0.0256 mas[1]
Distance175.7 ± 0.2 ly
(53.87 ± 0.07 pc)
Absolute magnitude (MV)+2.68[2]
Details[6]
Mass1.43[7] M☉
Radius2.64 [8] R☉
Luminosity7.58[8] L☉
Surface gravity (log g)3.86 cgs
Temperature5,986 K
Metallicity [Fe/H]+0.15 dex
Rotational velocity (v sin i)6.02 km/s
Age2.694±0.188 Gyr
Other designations
33 G. Antliae, CD−26° 7505, CPD−26 4079, HIP 48468, HR 3916, SAO 178130, WDS J09530-2720A[9]
Database references
SIMBADdata

HD 85725 has a stellar classification of G1 V,[3] which indicates that it is an ordinary G-type main-sequence star that is fusing hydrogen at its core. However, a low surface gravity[6] suggests that the object is a subgiant. At present it has 143%[7] the Sun’s mass but is twice as large,[8] which is not characteristic of a yellow dwarf. It shines at over 7[8] times the luminosity of the Sun and has a surface temperature of 5,986 K,[6] which gives it a yellow glow. At an age of 2.69 billion years[6] HD 85725 is spinning leisurely with a projected rotational velocity of 6.02 km/s. [6]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
  2. Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737.
  3. Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  4. Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. 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.
  6. Costa Silva, A. R.; Delgado Mena, E.; Tsantaki, M. (February 2020). "Chemical abundances of 1111 FGK stars from the HARPS-GTO planet search sample. III. Sulfur". Astronomy and Astrophysics. 634: A136. arXiv:1912.08659. Bibcode:2020A&A...634A.136C. doi:10.1051/0004-6361/201936523. ISSN 0004-6361.
  7. Ramírez, I.; Allende Prieto, C.; Lambert, D. L. (February 2013). "Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo". The Astrophysical Journal. 764 (1): 78. arXiv:1301.1582. Bibcode:2013ApJ...764...78R. doi:10.1088/0004-637X/764/1/78. S2CID 118751608.
  8. McDonald, I.; Zijlstra, A. A.; Watson, R. A. (October 2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471: 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711.
  9. "HD 85725". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 22 August 2017.
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