HD 73534

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HD 73534
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
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
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
Distance272 ± 1 ly
(83.5 ± 0.4 pc)
Absolute magnitude (MV)3.31
Mass1.29 ± 0.1 M
Radius2.65 ± 0.1 R
Luminosity3.79 L
Surface gravity (log g)3.81 cgs
Temperature4952 ± 50 K
Metallicity0.16 ± 0.04
Other designations
BD+13°1956, HIP 42446, PPM 125542, SAO 98004
Database references
Exoplanet Archivedata
Extrasolar Planets

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.

The HD 73534 planetary system[3]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b ≥1.01±0.21 MJ 2.95±0.22 1721±36 0 (fixed)

See also[edit]


  1. ^ a b c d e 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.
  3. ^ 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.

Coordinates: Sky map 08h 39m 15.8035s, +12° 57′ 37.351″