HD 33564
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 05h 22m 33.5290s[1]
Declination +79° 13′ 52.1427″[1]
Apparent magnitude (V) 5.08[2]
Characteristics
Spectral type F7V[3]
U−B color index −0.13
B−V color index 0.506±0.002[2]
Astrometry
Radial velocity (Rv)−11.03±0.23[1] km/s
Proper motion (μ) RA: −78.386±0.224[1] mas/yr
Dec.: 162.118±0.296[1] mas/yr
Parallax (π)47.6977 ± 0.1680 mas[1]
Distance68.4 ± 0.2 ly
(20.97 ± 0.07 pc)
Absolute magnitude (MV)3.59[4]
Details
Mass1.29[5] M☉
Radius1.51+0.02
−0.06[1] R☉
Luminosity3.428±0.017[1] L☉
Surface gravity (log g)4.22[5] cgs
Temperature6,396+135
−36[1] K
Metallicity [Fe/H]0.14[5] dex
Rotational velocity (v sin i)14.3[5] km/s
Age1.80[5] Gyr
Other designations
BD+79°169, GC 6455, HD 33564, HIP 25110, HR 1686, SAO 5496
Database references
SIMBADdata

HD 33564 is a single[6] star with an exoplanetary companion in the northern constellation of Camelopardalis. It has an apparent visual magnitude of 5.08,[2] which means it is a 5th magnitude star that is faintly visible to the naked eye. The system is located at a distance of 68 light years from the Sun based on parallax, and it is drifting closer with a radial velocity of −11 km/s.[1] It is a candidate member of the Ursa Major Moving Group.[7]

This is an ordinary F-type main-sequence star with a stellar classification of F7V,[3] indicating that the star is hotter and more massive than the Sun, giving it a yellow-white hue. The star is about two[5] billion years old and is chromospherically quiet,[8] with a projected rotational velocity of 14.3 km/s. It has about 1.5[1] times the radius and 1.3[5] times the mass of the Sun. The star is radiating 3.4 times the luminosity of the Sun from its photosphere at an effective temperature of 6,396 K.[5]

Planetary system

In September 2005, a massive planet was found on an eccentric orbit about the star, based on radial velocity variations measured by the ELODIE spectrograph. An infrared excess had been detected at a wavelength of 60 μm, suggesting the star may host a circumstellar disk. However, the existence of a disk is unlikely because the infrared radiation is coming from a background galaxy.[8]

The HD 33564 planetary system[8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >9.1 MJ 1.1 388 ± 3 0.34 ± 0.02 — —

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 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. 1 2 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.
  3. 1 2 Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
  4. ↑ Huang, W.; et al. (2012). "A catalogue of Paschen-line profiles in standard stars". Astronomy & Astrophysics. 547: A62. arXiv:1210.7893. Bibcode:2012A&A...547A..62H. doi:10.1051/0004-6361/201219804. S2CID 119286159.
  5. 1 2 3 4 5 6 7 8 Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal. 153 (1): 19. arXiv:1611.02897. Bibcode:2017AJ....153...21L. doi:10.3847/1538-3881/153/1/21. S2CID 119511744. 21.
  6. ↑ Halbwachs, J. -L; et al. (2018). "Multiplicity among solar-type stars. IV. The CORAVEL radial velocities and the spectroscopic orbits of nearby K dwarfs". Astronomy and Astrophysics. 619: A81. arXiv:1808.04605. Bibcode:2018A&A...619A..81H. doi:10.1051/0004-6361/201833377. S2CID 119437322.
  7. ↑ Montes, D.; et al. (November 2001). "Late-type members of young stellar kinematic groups - I. Single stars". Monthly Notices of the Royal Astronomical Society. 328 (1): 45–63. arXiv:astro-ph/0106537. Bibcode:2001MNRAS.328...45M. doi:10.1046/j.1365-8711.2001.04781.x. S2CID 55727428.
  8. 1 2 3 Galland, F.; et al. (2005). "Extrasolar planets and brown dwarfs around A-F type stars II. A planet found with ELODIE around the F6V star HD 33564". Astronomy and Astrophysics. 444 (2): L21–L24. arXiv:astro-ph/0509112. Bibcode:2005A&A...444L..21G. doi:10.1051/0004-6361:200500176. S2CID 119341964.
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