Astronomy:HD 116029

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Short description: Binary star system in the constellation of Coma Berenices
HD 116029
Observation data
Equinox J2000.0]] (ICRS)
Constellation Coma Berenices[1]
Right ascension  13h 20m 39.5420s[2]
Declination +24° 38′ 55.311″[2]
Apparent magnitude (V) 7.89[3]
Characteristics
Evolutionary stage red giant branch[2][4]
Spectral type K1IV+M[5]
B−V color index 1.009[6]
Astrometry
Radial velocity (Rv)−6.74±0.12[2] km/s
Proper motion (μ) RA: −14.322[2] mas/yr
Dec.: −52.252[2] mas/yr
Parallax (π)8.0853 ± 0.0384[2] mas
Distance403 ± 2 ly
(123.7 ± 0.6 pc)
Absolute magnitude (MV)+2.44[1]
Orbit[5]
PrimaryHD 116029 A
CompanionHD 116029 B
Semi-major axis (a)1.392"
(171 AU)
Details[5]
HD 116029 A
Mass1.445±0.094[3] M☉
Radius4.6±0.1[6] R☉
Luminosity11.7[7] L☉
Surface gravity (log g)3.40±0.06 cgs
Temperature4894±36[3] K
Metallicity0.12 ± 0.02[3]
Rotational velocity (v sin i)1.0±0.6[3] km/s
Age2.7±0.5[7] Gyr
HD 116029 B
Mass0.26 M☉
Surface gravity (log g)5.033±0.019 cgs
Other designations
BD+25 26232, HD 116029, HIP 65117, TYC 1994-2335-1, 2MASS J13203954+2438555[8]
Database references
SIMBADdata

HD 116029 is a binary star system about 400 light-years away.

The primary subgiant star HD 116029 A belongs to the spectral class K1. Its age is younger than the Sun`s at 2.7±0.5 billion years.[7] The primary star is slightly enriched by heavy elements, having 130% of solar abundance.[6] The primary star does not have detectable flare activity.[9]

In 2016 the co-moving binary stellar companion HD 116029 B was detected. It is a red dwarf star of visual magnitude 16.[10] The companion was confirmed orbiting the primary at a projected separation of 171 AU in 2017.[5]

Planetary system

In 2011 one superjovian planet, HD 116029 b, on a mildly eccentric orbit around star HD 116029 A was discovered utilizing the radial velocity method.[6] One more planet on a wider orbit was detected in 2016. The planets b and c are orbiting in a 2:3 orbital resonance.[11]

The HD 116029 planetary system[6][12]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
HD 116029 A b ≥2.1±0.2 MJ 1.73±0.04 670.2±8.3 <0.21 — —
HD 116029 A c ≥1.27±0.1 MJ — 907±30 0.038+0.127−0.038 — —

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 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.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Ghezzi, Luan; Montet, Benjamin T.; Johnson, John Asher (2018), "Retired a Stars Revisited: An Updated Giant Planet Occurrence Rate as a Function of Stellar Metallicity and Mass", The Astrophysical Journal 860 (2): 109, doi:10.3847/1538-4357/aac37c, Bibcode: 2018ApJ...860..109G 
  4. ↑ Ardern-Arentsen, Anke; Kane, Sarah G.; Belokurov, Vasily; Matsuno, Tadafumi; Montelius, Martin; Monty, Stephanie; Sanders, Jason L. (2025). "Predicting metallicities and carbon abundances from Gaia XP spectra for (Carbon-enhanced) metal-poor stars". Monthly Notices of the Royal Astronomical Society 537 (2): 1984. doi:10.1093/mnras/staf096. Bibcode: 2025MNRAS.537.1984A. 
  5. ↑ 5.0 5.1 5.2 5.3 Ngo, Henry (2017), "No Difference in Orbital Parameters of RV-detected Giant Planets between 0.1 and 5 au in Single versus Multi-stellar Systems", The Astronomical Journal 153 (6): 242, doi:10.3847/1538-3881/aa6cac, Bibcode: 2017AJ....153..242N 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 John Asher Johnson; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael et al. (2011), "Retired a Stars and Their Companions. Vii. 18 New Jovian Planets", The Astrophysical Journal Supplement Series 197 (2): 26, doi:10.1088/0067-0049/197/2/26, Bibcode: 2011ApJS..197...26J 
  7. ↑ 7.0 7.1 7.2 Bonsor, Amy; Kennedy, Grant M.; Wyatt, Mark C.; Johnson, John A.; Sibthorpe, Bruce (2013), "Herschel Observations of Debris Discs Orbiting Planet-hosting Subgiants", Monthly Notices of the Royal Astronomical Society 437 (4): 3288–3297, doi:10.1093/mnras/stt2128 
  8. ↑ "HD 116029". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+116029. 
  9. ↑ Evgenya L. Shkolnik, "AN ULTRAVIOLET INVESTIGATION OF ACTIVITY ON EXOPLANET HOST STARS", 2013
  10. ↑ Ginski, C.; Mugrauer, M.; Seeliger, M.; Buder, S.; Errmann, R.; Avenhaus, H.; Mouillet, D.; Maire, A.-L. et al. (2016), "A lucky imaging multiplicity study of exoplanet host stars II", Monthly Notices of the Royal Astronomical Society 457 (2): 2173–2191, doi:10.1093/mnras/stw049, Bibcode: 2016MNRAS.457.2173G 
  11. ↑ Bryan, Marta L.; Knutson, Heather A.; Howard, Andrew W.; Ngo, Henry; Batygin, Konstantin; Crepp, Justin R.; Fulton, B. J.; Hinkley, Sasha et al. (2016), "Statistics of Long Period Gas Giant Planets in Known Planetary Systems", The Astrophysical Journal 821 (2): 89, doi:10.3847/0004-637X/821/2/89, Bibcode: 2016ApJ...821...89B 
  12. ↑ Planet HD 116029 A c on exoplanet.eu

Coordinates: Sky map 13h 20m 39.5422s, +24° 38′ 55.3099″



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