HD 33564
HD 33564 is a 5th magnitude star located approximately 68 light-years away in the constellation of Camelopardalis. It is an F-type main sequence, indicating that the star is hotter and more massive than our Sun. The age of the star is only 3 Ga; despite of this, the star is only 76% the solar abundance of iron. HD 33564 is a naked eye planetary host star.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 22m 33.5290s[1] |
| Declination | +79° 13′ 52.1427″[1] |
| Apparent magnitude (V) | 5.095 |
| Characteristics | |
| Spectral type | F6V |
| U−B color index | −0.13 |
| B−V color index | 0.47 |
| Astrometry | |
| Radial velocity (Rv) | −9.9±0.9 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[1] mas |
| Distance | 68.4 ± 0.2 ly (20.97 ± 0.07 pc) |
| Absolute magnitude (MV) | 3.59[2] |
| Details | |
| Mass | 1.25 M☉ |
| Radius | 1.47 R☉ |
| Luminosity | 3.18 L☉ |
| Surface gravity (log g) | 28.9 g cgs |
| Temperature | 6,370 K |
| Metallicity [Fe/H] | −0.12 dex |
| Rotation | 0 km/s |
| Age | 3 ± 0.6 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
In September 2005, a massive planet was found orbiting the star surrounded by a disk. However, by next month, the disk was disproved because the infrared radiation is actually coming from the background galaxy passing very close to its star in apparent distance.[3]
| 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
- 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.
- 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.
- 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.
External links
- "Notes for star HD 33564". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-20.
- HR%201686 HR 1686
- obswww.unige.ch
- CCDM J05227+7913
- Image HD 33564
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