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HD 73534 is an 8th magnitude G-type subgiant star located approximately 272 light years away in the constellation Cancer. A G5 star, it has evolved off the main sequence, which is why it is much more luminous than the Sun. In August 2009, it was announced that it has a planet.[2] It is the first planetary system discovered in Cancer since that of 55 Cancri in April 1996, and the sixth planet, as 55 Cancri has five known planets.

HD 73534
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension 08h 39m 15.80305s[1]
Declination +12° 57′ 37.3485″[1]
Apparent magnitude (V) 8.23[2]
Characteristics
Spectral type G5IV[2]
Apparent magnitude (B) 9.192[3]
Apparent magnitude (J) 6.524±0.018[3]
Apparent magnitude (H) 6.072±0.020[3]
Apparent magnitude (K) 5.962±0.026[3]
B−V color index 0.962±0.021[3]
Astrometry
Radial velocity (Rv)+10.08±0.15[1] km/s
Proper motion (μ) RA: −114.056±0.092[1] mas/yr
Dec.: −93.903±0.059[1] mas/yr
Parallax (π)11.9716 ± 0.0529 mas[1]
Distance272 ± 1 ly
(83.5 ± 0.4 pc)
Absolute bolometric
magnitude (Mbol)		3.42[2]
Details[2]
Mass1.228±0.060 M☉
Radius2.39±0.16 R☉
Luminosity3.33±43 L☉
Surface gravity (log g)3.780±0.060 cgs
Temperature5,041±44 K
Metallicity [Fe/H]0.232±0.030 dex
Rotation~53 d
Other designations
BD+13°1956, HD 73534, HIP 42446, SAO 98004, PPM 125542[4]
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

The star HD 73534 is named Gakyid. The name was selected by Bhutan as part of the NameExoWorlds campaigns during the 100th anniversary of the IAU. Gakyid means happiness.[5][6]

The HD 73534 planetary system[7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.01±0.21 MJ 2.95±0.22 1721±36 0 (fixed) — —

See also



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. Valenti, Jeff A.; et al. (2009). "Two Exoplanets Discovered at Keck Observatory". The Astrophysical Journal. 702 (2): 989–997. arXiv:0908.1612. Bibcode:2009ApJ...702..989V. doi:10.1088/0004-637X/702/2/989. S2CID 16707072.
  3. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  4. "HD 73534". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-14.{{cite web}}: CS1 maint: postscript (link)
  5. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  6. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  7. 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. S2CID 119243619.

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HD 73534 — звезда в созвездии Рака на расстоянии около 316 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.


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