HD 210277
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 09m 29.866s[1] |
| Declination | −07° 32′ 55.15″[1] |
| Apparent magnitude (V) | 6.63 |
| Characteristics | |
| Spectral type | G0V |
| U−B color index | 0.43 |
| B−V color index | 0.773 |
| Astrometry | |
| Radial velocity (Rv) | -24.1 km/s |
| Proper motion (μ) | RA: 85.07 ± 0.46[1] mas/yr Dec.: -449.74 ± 0.30[1] mas/yr |
| Parallax (π) | 46.38 ± 0.48[1] mas |
| Distance | 70.3 ± 0.7 ly (21.6 ± 0.2 pc) |
| Absolute magnitude (MV) | 4.99 |
| Details | |
| Mass | 1.09 M☉ |
| Radius | 1.1 ± 0.05 R☉ |
| Luminosity | 1.2 L☉ |
| Temperature | 5532 ± 14 K |
| Metallicity | 0.19 ± 0.04 |
| Age | 6.93 G years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia |
data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
HD 210277 is a 7th magnitude star in the constellation of Aquarius. It is a yellow dwarf star (spectral type G0V) with a mass around 0.92 times that of our Sun.[2] Since its distance is about 70 light years,[1] it is not visible to the unaided eye. With binoculars it is easily visible.
The star has a massive extrasolar planet orbiting it.[3] Also, in 1999 the discovery of a circumstellar disk was announced by T. E. Trilling et al. based on observations in infrared wavelengths. The disk is probably similar to the Kuiper belt in the Solar System.
Planetary system and unconfirmed dust disk
Claims were made in 1999 that a dust disk around the star HD 210277, similar to that produced by the Kuiper Belt had been imaged, lying between 30 and 62 AU from the star.[4] However, observations with the Spitzer Space Telescope failed to detect any infrared excess at 70 micrometres or at 24 micrometres wavelengths.[5][6][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >1.29 ± 0.11 MJ | 1.138 ± 0.066 | 442.19 ± 0.50 | 0.476 ± 0.017 | — | — |
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
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External links
Coordinates: 
22h 09m 29.8657s, −07° 32′ 55.155″
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