HD 33564
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 22m 33.53s[1] |
| Declination | +79° 13′ 52.1″[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: -78.48 ± 0.15[1] mas/yr Dec.: 161.95 ± 0.22[1] mas/yr |
| Parallax (π) | 47.88 ± 0.21[1] mas |
| Distance | 68.1 ± 0.3 ly (20.89 ± 0.09 pc) |
| Absolute magnitude (MV) | 3.486 |
| Details | |
| Mass | 1.25 M☉ |
| Radius | 1.47 R☉ |
| Luminosity | 3.18 L☉ |
| Surface gravity (log g) | 28.9 g cgs |
| Temperature | 6370 K |
| Metallicity | -0.12 |
| Rotation | 0 Km/s |
| Age | 3 ± 0.6 G years |
| Orbit | |
| Companion | CCDM 05227+7913 B STF 634B |
| Semi-major axis (a) | 10.4" |
| Inclination (i) | 91° |
| Orbit | |
| Companion | CCDM 05227+7913 C STF 634C |
| Semi-major axis (a) | 192.6" |
| Inclination (i) | 150° |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
| Database references | |
| SIMBAD | data |
HD 33564 is a 5th magnitude binary star located approximately 68 light-years away[1] 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.
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.[2]
| 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 2 3 4 5 6 van Leeuwen, F. (2007). "HIP 25110". Hipparcos, the New Reduction. Retrieved 2010-02-27.
- 1 2 Galland; Lagrange, A.-M.; Udry, S.; Chelli, A.; Pepe, F.; Beuzit, J.-L.; Mayor, M. (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
Coordinates: 
05h 22m 33.5319s, +79° 13′ 52.135″
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