HD 222582
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 41m 51.53s[1] |
| Declination | –05° 59′ 08.7″[1] |
| Apparent magnitude (V) | 7.685 ± 0.005[2] |
| Characteristics | |
| Spectral type | G5 |
| B−V color index | 0.648 |
| Astrometry | |
| Radial velocity (Rv) | 11.5 ± 0.2 km/s |
| Proper motion (μ) | RA: -144.88 ± 0.88[1] mas/yr Dec.: -111.93 ± 0.56[1] mas/yr |
| Parallax (π) | 23.94 ± 0.74[1] mas |
| Distance | 136 ± 4 ly (42 ± 1 pc) |
| Absolute magnitude (MV) | 4.44 ± 0.12[2] |
| Details | |
| Mass | 1.00[2] M☉ |
| Radius | 1.16 ± 0.07[2] R☉ |
| Luminosity | 1.2 L☉ |
| Surface gravity (log g) | 4.34 ± 0.10[2] cgs |
| Temperature | 5776 ± 70[2] K |
| Metallicity [Fe/H] | -0.01 ± 0.07[2] dex |
| Rotational velocity (v sin i) | 1.5 ± 1.0[2] km/s |
| Age | 6.16 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Planet | |
| HD 222582 b | Data Simbad |
| Data ExoPlanet | |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
HD 222582 is a magnitude 7.7 star approximately 136 light-years away in the constellation of Aquarius. In 1999, a dense superjovian planet was announced orbiting the star by Steven Vogt. There is a red dwarf companion in a wide orbit.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >7.75 MJ | 1.35 | 572 | 0.76 | — | — |
| c (unconfirmed) | >0.0513 MJ | 0.12 | 15.144 | 0.5632 | — | — |
See also
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry - 1 2 3 4 5 6 7 8 Fuhrmann, Klaus (February 2008), "Nearby stars of the Galactic disc and halo - IV", Monthly Notices of the Royal Astronomical Society, 384 (1): 173–224, Bibcode:2008MNRAS.384..173F, doi:10.1111/j.1365-2966.2007.12671.x
- S. S. Vogt; et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal. 536 (2): 902–914. arXiv:astro-ph/9911506. Bibcode:2000ApJ...536..902V. doi:10.1086/308981.
- D. Raghavan; et al. (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal. 646 (1): 523–542. arXiv:astro-ph/0603836. Bibcode:2006ApJ...646..523R. doi:10.1086/504823.
External links
- "HD 222582 Image". Simbad.
Coordinates: 
23h 41m 51.5299s, −05° 59′ 08.726″
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