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HD 79498 is a primary of the star system located 159 light years away in the constellation Cancer. This G5 main sequence star has an apparent magnitude of 8.0 and is about the same size and mass as the Sun. It has a higher than solar abundance of elements other than hydrogen and helium; what astronomers term a metal-rich star.[8]

HD 79498
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension 09h 15m 09.4020s[1]
Declination +23° 22′ 31.979″[1]
Apparent magnitude (V) 8.05[2]
Characteristics
Evolutionary stage main sequence
Spectral type G5V[3]
Astrometry
Radial velocity (Rv)19.94±0.14[1] km/s
Proper motion (μ) RA: −127.013[1] mas/yr
Dec.: −155.703[1] mas/yr
Parallax (π)20.5658 ± 0.0198 mas[1]
Distance158.6 ± 0.2 ly
(48.62 ± 0.05 pc)
Absolute magnitude (MV)4.62[4]
Details
Mass1.08[5] M☉
Radius1.05[2] R☉
Luminosity1.07[2] L☉
Surface gravity (log g)4.43[3] cgs
Temperature5,800[3] K
Metallicity [Fe/H]+0.21[3] dex
Rotational velocity (v sin i)2.0[6] km/s
Age2.8[5] Gyr
Other designations
BD+23°2063, HD 79498, HIP 45406, SAO 80717, 2MASS J09150941+2322323[7]
Database references
SIMBADdata

The secondary star of the star system is the BD+23 2063 B located on the projected separation of the 2900 AU from the primary.[9] It is a red dwarf of spectral class M0.[10]


Planetary system


The McDonald Observatory planet search program discovered planet orbiting primary in 2011 using radial velocity method.[9]

The HD 79498 planetary system[9]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.34 ± 0.07 MJ 3.13 ± 0.08 1966 ± 41 0.59 ± 0.02 — —

See also



References


  1. Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
  2. Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5.
  3. Montes, D.; et al. (September 2018). "Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics". Monthly Notices of the Royal Astronomical Society. 479 (1): 1332–1382. arXiv:1805.05394. Bibcode:2018MNRAS.479.1332M. doi:10.1093/mnras/sty1295. S2CID 119260219.
  4. Boro Saikia, S.; Marvin, C. J.; Jeffers, S. V.; Reiners, A.; Cameron, R.; Marsden, S. C.; Petit, P.; Warnecke, J.; Yadav, A. P. (2018). "Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles". Astronomy and Astrophysics. 616: 616. arXiv:1803.11123. Bibcode:2018A&A...616A.108B. doi:10.1051/0004-6361/201629518. S2CID 118915212.
  5. Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (2018). "Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert". Astronomy and Astrophysics. 614: A55. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. S2CID 62799777.
  6. Llorente de Andrés, F.; Chavero, C.; de la Reza, R.; Roca-Fàbrega, S.; Cifuentes, C. (October 2021). "The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert". Astronomy and Astrophysics. 654: A137. arXiv:2108.05852. Bibcode:2021A&A...654A.137L. doi:10.1051/0004-6361/202141339. ISSN 0004-6361.
  7. "HD 79498". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 15 August 2012.
  8. Schneider, Jean, "Planet HD 79498 b", The Extrasolar Planet Encyclopedia, Paris Observatory, retrieved 2012-08-22
  9. Robertson, Paul; et al. (April 2012), "The McDonald Observatory Planet Search: New Long-period Giant Planets and Two Interacting Jupiters in the HD 155358 System", The Astrophysical Journal, 749 (1): 39, arXiv:1202.0265, Bibcode:2012ApJ...749...39R, doi:10.1088/0004-637X/749/1/39, S2CID 59273311.
  10. "BD+23 2063B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 October 2012.


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HD 79498 — звезда в созвездии Рака. Находится на расстоянии около 159 световых лет от Солнца. Вокруг звезды обращается, как минимум, одна планета.


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