HD 231701
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagitta[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 8.97[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3][2] |
| Spectral type | F8 V[1] |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[2] Dec.: Script error: No such module "val". mas/yr[2] |
| Parallax (π) | 9.2189±0.0160 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 3.64[1] |
| Details | |
| Mass | Script error: No such module "val".[4] Template:Solar mass |
| Radius | Script error: No such module "val".[5] Template:Solar radius |
| Luminosity | Script error: No such module "val".[5] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[6] cgs |
| Temperature | Script error: No such module "val".[5] K |
| Metallicity [Fe/H] | Script error: No such module "val".[7] dex |
| Rotational velocity (v sin i) | 4.26[6] km/s |
| Age | Script error: No such module "val".[4] or 4.5[3] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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HD 231701 is a yellow-white hued star in the northern constellation of Sagitta, near the southern constellation border with Aquila. With an apparent visual magnitude of 8.97,[1] it is too dim to be viewed with the naked eye, but can be seen with powerful binoculars or a small telescope. Parallax measurements provide a distance estimate of approximately 354 light-years from the Sun, but it is drifting closer with a radial velocity of −63 km/s.[2] It is predicted to come as close as Script error: No such module "convert". in 1.345 million years.[1]
HD 231701 is named Uruk. The name was selected in the NameExoWorlds campaign by Iraq, during the 100th anniversary of the IAU. Uruk was an ancient city of the Sumer and Babylonian civilizations in Mesopotamia.[9][10]
This object is an ordinary F-type main-sequence star with a stellar classification of F8 V.[1] It is around three[4] to 4.5 billion years old and may be evolving onto the subgiant branch.[3] It is spinning with a projected rotational velocity of 4 km/s[6] and has low chromospheric activity.[3] HD 231701 has 1.2[4] times the mass of the Sun and 1.45[5] times the Sun's radius. It is radiating 2.6 times the luminosity of the Sun from its photosphere at an effective temperature of 6,081 K.[5]
In 2007, the N2K Consortium used the radial velocity technique to discover a Jupiter-like planet orbiting at a distance of Script error: No such module "val". from the star with a period of 141.6 days.[3]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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See also
References
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External links
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