| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 16h 02m 11.840s [1] |
| Declination | +28° 10′ 10.43″ [1] |
| Apparent magnitude (V) | 11.19 ± 0.03 [2] |
| Characteristics | |
| Spectral type | G1V [2] |
| Apparent magnitude (B) | ~11.7 [1] |
| Apparent magnitude (V) | 11.19 ± 0.03 [2] |
| Apparent magnitude (J) | 9.939 ± 0.022 [1] |
| Apparent magnitude (H) | 9.601 ± 0.017 [1] |
| Apparent magnitude (K) | 9.527 ± 0.015 [1] |
| Variable type | V*(SWASP1) [3] |
| Astrometry | |
| Proper motion (μ) | RA: -19.7 [1] mas/yr Dec.: 15.0 [1] mas/yr |
| Distance | 600 ly (200 ± 20 [2] pc) |
| Absolute magnitude (MV) | 5.02+0.14 −0.16 [4] |
| Details | |
| Mass | 1.027+0.057 −0.061 [4] M☉ |
| Radius | 0.94 ± 0.02 [5] R☉ |
| Age | 1.0+3.1 −0.9 [4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
XO-1 is a magnitude 11 yellow dwarf star located approximately 600 light-years away in the constellation Corona Borealis.[1] XO-1 has a mass and radius similar to the Sun The SuperWASP project has observed and classified this star as a variable star, perhaps due to the eclipsing planet. This star is not listed in the General Catalog of Variable Stars.[3]
Contents |
In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope. This international team of professional and amateur astronomers discovered a Jupiter-sized planet orbiting around XO-1. The team, led by Peter McCullough of the Space Telescope Science Institute in Baltimore, includes four amateur astronomers from North America and Europe.
The planet was confirmed using the Harlan J. Smith Telescope and Hobby-Eberly Telescope at McDonald Observatory of the University of Texas.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| XO-1b | 0.92 ± 0.08 MJ | 0.049 ± 0.001 | 3.94150685 ± 0.00000091 | 0(assumed) |