HD 207129
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Grus |
| Right ascension | 21h 48m 15.7512s |
| Declination | −47° 18′ 13.018″ |
| Apparent magnitude (V) | 5.57 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G2V |
| U−B color index | +0.08 |
| B−V color index | +0.60 |
| Astrometry | |
| Radial velocity (Rv) | −7.55±0.12 km/s |
| Proper motion (μ) | RA: +165.069 mas/yr Dec.: −295.553 mas/yr |
| Parallax (π) | 64.2717±0.0430 mas |
| Distance | 50.75 ± 0.03 ly (15.56 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.55 |
| Details | |
| Mass | 1.06±0.01 M☉ |
| Radius | 1.1 R☉ |
| Luminosity | 1.37 L☉ |
| Surface gravity (log g) | 4.47±0.01 cgs |
| Temperature | 5,932±3 K |
| Metallicity [Fe/H] | −0.007±0.003 dex |
| Rotation | ~12.6 days |
| Rotational velocity (v sin i) | 2 km/s |
| Age | 2.70+0.23 −0.28 Gyr |
| Other designations | |
| CCDM J21483-4718A, CD−47 13928, CPD−47 9758, FK5 1573, GC 30516, Gliese 838, GJ 838, HR 8323, HIP 107649, IDS 21418-4746 A, LTT 8704, NLTT 52100, PPM 327579, SAO 230846, WDS J21483-4718A | |
| Database references | |
| SIMBAD | data |
.jpg){kind=link}
HD 207129 is a G-type main-sequence star in the constellation of Grus. It has an apparent visual magnitude of approximately 5.6 This is a Sun-like star with the same stellar classification G2V and a similar mass. It is roughly the same age as the Sun, but has a lower abundance of elements other than hydrogen and helium; (which astronomers refer to as the star's metallicity).
A debris disk has been imaged around this star in visible light using the ACS instrument on the Hubble Space Telescope; it has also been imaged in the infrared (70 μm) using the MIPS instrument on the Spitzer Space Telescope. Based on the ACS image, the disk appears to have a radius of about 163 astronomical units and to be about 30 AU wide, and to be inclined at 60° to the plane of the sky.
Another star, CCDM J21483-4718B (also designated CD−47 13929 or WDS J21483-4718B), of apparent visual magnitude 8.7, has been observed 55 arcseconds away from this star, but based on comparison of proper motions, it is believed to be an optical double and not physically related to its companion.