HD 85725

Last updated
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)61.6±0.1 [5]  km/s
Proper motion (μ)RA: −278.245  mas/yr [1]
Dec.: +95.043  mas/yr [1]
Parallax (π)18.5634 ± 0.0256  mas
Distance 175.7 ± 0.2  ly
(53.87 ± 0.07  pc)
Absolute magnitude  (MV)+2.68 [2]
Details
Mass 1.42 [6]   M☉
Radius 2.59±0.11 [7]   R☉
Luminosity 7.58 [8]   L☉
Surface gravity (log g)3.86 [9]   cgs
Temperature 5,940±110 [7]   K
Metallicity [Fe/H]+0.15 [10]   dex
Rotational velocity (v sin i)5.9±0.3 [11]  km/s
Age 2.75 [6]   Gyr
Other designations
33 G. Antliae, CD−26° 7505, CPD−26°4079, HIP  48468, HR  3916, SAO  178130, WDS J09530-2720A [12]
Database references
SIMBAD data

HD 85725, also known as HR 3916, is a yellow hued star located in the southern constellation Antlia. It has an apparent magnitude of 6.29, [2] placing it near the limit for naked eye visibility. The object is relatively close at a distance of 176 light-years, [1] but is receding with a heliocentric radial velocity of 61.6  km/s . [5]

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 of 7244  cm/s2 [9] suggests that the object is instead an evolved subgiant.

At present it has 143% [6] the mass of the Sun but is 2.59 times larger, [7] which is not characteristic of a yellow dwarf. It shines at 7.6 [8] times the luminosity of the Sun from its photosphere at a surface temperature of 5,940 K, [7] which gives it a yellow glow. At an age of 2.75 billion years, [6] HD 85725 is spinning leisurely with a projected rotational velocity of 5.9  km/s . [11]

There is a 10th magnitude companion located 1.5″ away along a position angle of 25° . It appears to have a common proper motion with the star, suggesting physical relation. [13]

Related Research Articles

HD 101930, also known as Gliese 3683, is an orange hued star with an orbiting exoplanet located in the southern constellation Centaurus. It has an apparent magnitude of 8.21, making it faintly visible in binoculars but not to the naked eye. The system is located relatively close at a distance of 98 light years but is receding with a heliocentric radial velocity of 18.4 km/s. It has a relatively large proper motion, traversing the celestial sphere with an angular velocity of 0.320″·yr−1.

Tau1 Capricorni is a star in the constellation Capricornus. It has an apparent magnitude of 6.76, making it readily visible in binoculars, but not to the naked eye. Located approximately 750 light years from Earth, the star is receding with a heliocentric radial velocity of 18.5 km/s. Due to its location near the ecliptic, τ1 Cap can be occulted by the Moon and rarely planets.

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.

HD 88809 is a star located in the southern constellation Antlia. With an apparent magnitude of 5.89 it is barely visible to the naked eye under ideal conditions. The star is located at a distance of around 451 light years but is drifting away at a heliocentric radial velocity of almost 20 km/s.

4 Camelopardalis is a probable multiple star in the northern constellation of Camelopardalis, located 177 light years away from the Sun, based upon parallax. With a combined apparent visual magnitude of 5.29, it is visible to the naked eye as a faint, white-hued star. The pair have a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.158″ per year. The system's proper motion makes it a candidate for membership in the IC 2391 supercluster. They are moving away from the Earth with a heliocentric radial velocity of 22.5 km/s.

<span class="mw-page-title-main">HD 27245</span> Star in the constellation Camelopardalis

HD 27245, also known as HR 1335 or rarely 25 H. Camelopardalis is a solitary red-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.4, making it faintly visible to the naked eye. Gaia DR3 Parallax measurements place it approximately 607 light years away from it the Solar System and is drifting further away with a heliocentric radial velocity of 25.2 km/s. At its current distance, HD 27245's brightness is diminished by 0.36 magnitudes due to extinction from interstellar dust. It has an absolute magnitude of −0.27.

HD 30442 is a solitary star in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with an apparent magnitude of 5.47 and is estimated to be 403 light years away from the Solar System. The object has a heliocentric radial velocity of −37 km/s, indicating that it is drifting closer.

HD 190984, also known as HIP 99496, is a star located in the southern circumpolar constellation Pavo, the peacock. It has an apparent magnitude of 8.76, making it readily visible in small telescopes, but not to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 486 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 20.3 km/s.

<span class="mw-page-title-main">Chi Ceti</span> Double star in the constellation Cetus

Chi Ceti , is the Bayer designation for a double star in the equatorial constellation of Cetus. They appear to be common proper motion companions, sharing a similar motion through space. The brighter component, HD 11171, is visible to the naked eye with an apparent visual magnitude of 4.66, while the fainter companion, HD 11131, is magnitude 6.75. Both lie at roughly the same distance, with the brighter component lying at an estimated distance of 75.6 light years from the Sun based upon an annual parallax shift of 43.13 mass.

μ1 Chamaeleontis, Latinized as Mu1 Chamaeleontis, is a single star in the southern circumpolar constellation Chamaeleon. It is dimly visible to the naked eye with an apparent visual magnitude of 5.53. Based upon parallax measurements, it is located approximately 403 light-years away from the Sun. The radial velocity is poorly constrained, but it appears to be drifting further away at the rate of about 16 km/s

HD 126053 is the Henry Draper Catalogue designation for a star in the equatorial constellation of Virgo. It has an apparent magnitude of 6.25, which means it is faintly visible to the naked eye. According to the Bortle scale, it requires dark suburban or rural skies to view. Parallax measurements made by the Hipparcos spacecraft provide an estimated distance of 57 light years to this star. It is drifting closer with a heliocentric radial velocity of −19.2 km/s.

HD 195564 is the Henry Draper Catalogue designation for a star in the southern constellation of Capricornus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.65. Parallax measurements give us an estimate of its distance as 81 light years. This is a candidate wide binary system as a faint companion star shares a common proper motion with the brighter primary component.

c Ursae Majoris is the Bayer designation for a double-lined spectroscopic binary star system in the northern constellation of Ursa Major. It has an apparent visual magnitude of 5.18, which indicates that is visible to the naked eye. Parallax measurements yield an estimated distance of 66 light years from the Sun. The star is moving closer to the Earth with a heliocentric radial velocity of −14 km/s.

HD 53501, is a solitary star in the southern circumpolar constellation Volans. It has an apparent magnitude of 5.18, allowing it to be seen with the naked eye under ideal conditions. The object is located at a distance of 308 light years but is receding with a heliocentric radial velocity of 39 km/s.

HD 33266 is a solitary star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 6.17, making it faintly visible to the naked eye. Located 481 light years away, it is approaching the Sun with a heliocentric radial velocity of −4.4 km/s.

HR 2131 is a solitary star in the southern constellation Columba. It has an apparent magnitude of 5.52, allowing it to be faintly seen with the naked eye. The object is located at a distance of 670 light years but is receding with a heliocentric radial velocity of 19 km/s.

<span class="mw-page-title-main">Tau Octantis</span> Star in the southern constellation of Octans

Tau Octantis, Latinized from τ Octantis, is a solitary star in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.50, allowing it to be faintly seen with the naked eye. The object is located at a distance of 480 light years but is receding with a heliocentric radial velocity of 31 km/s.

HD 46568 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.25. Parallax measurements place the object at a distance of 284 light years and is currently receding with a heliocentric radial velocity of 39 km/s.

HD 46815 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.

15 Delphini is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.99, allowing it to be faintly seen with the naked eye. The star is relatively close at a distance of 99 light years but is receding with a heliocentric radial velocity of 4.1 km/s.

References

  1. 1 2 3 4 5 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. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 1 2 3 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   1063-7737. S2CID   255204555.
  3. 1 2 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. 1 2 Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S. (August 2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series. 141 (2): 503–522. arXiv: astro-ph/0112477 . Bibcode:2002ApJS..141..503N. doi: 10.1086/340570 . eISSN   1538-4365. ISSN   0067-0049.
  6. 1 2 3 4 "BaSTI Home Page". basti.oa-abruzzo.inaf.it.
  7. 1 2 3 4 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . eISSN   1538-3881.
  8. 1 2 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 (1): 770–791. arXiv: 1706.02208 . Bibcode:2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433 . ISSN   0035-8711.
  9. 1 2 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.
  10. ↑ Delgado Mena, E.; Adibekyan, V.; Santos, N. C.; Tsantaki, M.; González Hernández, J. I.; Sousa, S. G.; Bertrán de Lis, S. (November 2021). "Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program". Astronomy & Astrophysics. 655: A99. arXiv: 2109.04844 . Bibcode:2021A&A...655A..99D. doi:10.1051/0004-6361/202141588. eISSN   1432-0746. ISSN   0004-6361. S2CID   237485512.
  11. 1 2 Saar, S. H.; Osten, R. A. (1 February 1997). "Rotation, turbulence and evidence for magnetic fields in southern dwarfs". Monthly Notices of the Royal Astronomical Society. 284 (4): 803–810. Bibcode:1997MNRAS.284..803S. doi: 10.1093/mnras/284.4.803 . eISSN   1365-2966. ISSN   0035-8711.
  12. ↑ "HD 85725". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 22 August 2017.
  13. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . ISSN   0004-6256.
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