HD 73534
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 our 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.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 39m 15.8030s[1] |
| Declination | +12° 57′ 37.3485″[1] |
| Apparent magnitude (V) | 8.24 |
| Characteristics | |
| Spectral type | G5IV |
| Apparent magnitude (B) | 9.19 |
| Apparent magnitude (J) | 6.524 |
| Apparent magnitude (H) | 6.072 |
| Apparent magnitude (K) | 5.962 |
| B−V color index | 0.95 |
| Astrometry | |
| 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[1] mas |
| Distance | 272 ± 1 ly (83.5 ± 0.4 pc) |
| Absolute magnitude (MV) | 3.31 |
| Details | |
| Mass | 1.29 ± 0.1 M☉ |
| Radius | 2.65 ± 0.1 R☉ |
| Luminosity | 3.79 L☉ |
| Surface gravity (log g) | 3.81 cgs |
| Temperature | 4952 ± 50 K |
| Metallicity | 0.16 ± 0.04 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| 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.[3][4]
| 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
- HD 179079
- List of extrasolar planets
References
- 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.
- 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.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- 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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