Article · Wikipedia archive · Last revised Jul 7, 2026

HD 125072

HD 125072 is a star in the southern constellation of Centaurus. It is a challenge to view with the naked eye, having an apparent visual magnitude of 6.637. The star is located at a distance of 38.6 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −14.9 km/s. The components of the space velocity for this star are U=−18.5, V=−6.9 and W=−26.9 km/s.

Last revised
Jul 7, 2026
Read time
≈ 2 min
Length
520 w
Citations
30
Source
Wikipedia ↗
HD 125072
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 14h 19m 04.83414s1
Declination −59° 22′ 44.5272″1
Apparent magnitude (V) 6.6372
Characteristics
Spectral type K3 IV3
U−B color index +0.9054
B−V color index +1.0254
Astrometry
Radial velocity (Rv)−14.95 km/s
Proper motion (μ) RA: −454.8951 mas/yr
Dec.: −810.7291 mas/yr
Parallax (π)84.4535±0.0349 mas1
Distance38.62 ± 0.02 ly
(11.841 ± 0.005 pc)
Absolute magnitude (MV)6.282
Details
Mass0.806±0.0176 M☉
Radius0.83+0.02
−0.011 R☉
Luminosity0.347±0.0011 L☉
Surface gravity (log g)4.483 cgs
Temperature4,858+47
−591 K
Metallicity [Fe/H]−0.707 dex
Rotational velocity (v sin i)3.978 km/s
Age9.987 Gyr
Other designations
CD−58°5564, GJ 542, HD 125072, HIP 69972, SAO 241627, LHS 2892, LTT 56259
Database references
SIMBADdata

HD 125072 is a star in the southern constellation of Centaurus. It is a challenge to view with the naked eye, having an apparent visual magnitude of 6.637.2 The star is located at a distance of 38.6 light years from the Sun based on parallax.1 It is drifting closer with a radial velocity of −14.9 km/s.5 The components of the space velocity for this star are U=−18.5, V=−6.9 and W=−26.9 km/s.7

The stellar classification of this star is K3 IV,3 matching a K-type subgiant that is evolving into a giant. It has 81%6 of the Sun's mass and 83%1 of the radius of the Sun. The star is radiating 34.7% of the Sun's luminosity from its photosphere at an effective temperature of 4,858 K.1 Based on the composition and kinematics of this star, it has an estimated age of about 10 billion years.7 It is spinning with a projected rotational velocity of 4 km/s.8

References

References

  1. 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. Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511
  3. Gray, R. O.; et al. (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, S2CID 119476992
  4. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  5. Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E
  6. Tsantaki, M.; et al. (July 2013), "Deriving precise parameters for cool solar-type stars. Optimizing the iron line list", Astronomy & Astrophysics, 555: A150, arXiv:1304.6639, Bibcode:2013A&A...555A.150T, doi:10.1051/0004-6361/201321103, S2CID 118388752.
  7. Lachaume, R.; et al. (1999). "Age determinations of main-sequence stars: combining different methods". Astronomy and Astrophysics. 348: 897–909. Bibcode:1999A&A...348..897L.
  8. Martínez-Arnáiz, R.; et al. (September 2010). "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF). Astronomy and Astrophysics. 520: A79. arXiv:1002.4391. Bibcode:2010A&A...520A..79M. doi:10.1051/0004-6361/200913725. S2CID 43455849. Archived from the original (PDF) on 2017-09-22. Retrieved 2018-11-04.
  9. "HD 125072". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-11-08.