XO-1
XO-1 is a magnitude 11 G-type main-sequence star located approximately 530 light-years away in the constellation Corona Borealis. XO-1 has a mass and radius similar to the Sun. In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope.
This artist's impression shows a dramatic close-up of the extrasolar planet XO-1b passing in front of a Sun-like star 600 light-years from Earth. The Jupiter-sized planet is in a tight four-day orbit around the star. Credit: NASA, ESA and G. Bacon (STScI) | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 16h 02m 11.8462s |
| Declination | +28° 10′ 10.420″ |
| Apparent magnitude (V) | 11.19 ± 0.03 |
| Characteristics | |
| Spectral type | G1V |
| Apparent magnitude (B) | 11.85 ± 0.04 |
| Apparent magnitude (V) | 11.19 ± 0.03 |
| Apparent magnitude (J) | 9.939 ± 0.022 |
| Apparent magnitude (H) | 9.601 ± 0.017 |
| Apparent magnitude (K) | 9.527 ± 0.015 |
| Variable type | Planetary transit variable |
| Astrometry | |
| Proper motion (μ) | RA: −17.349(12) mas/yr Dec.: 14.780(15) mas/yr |
| Parallax (π) | 6.1489 ± 0.0136 mas |
| Distance | 530 ± 1 ly (162.6 ± 0.4 pc) |
| Absolute magnitude (MV) | 5.02+0.14 −0.16 |
| Details | |
| Mass | 1.027+0.057 −0.061 M☉ |
| Radius | 0.94 ± 0.02 R☉ |
| Luminosity | 0.86+0.12 −0.10 L☉ |
| Surface gravity (log g) | 4.50 ± 0.01 cgs |
| Temperature | 5738 ± 65 K |
| Metallicity [Fe/H] | −0.06 ± 0.07 dex |
| Rotational velocity (v sin i) | 1.1 ± 1.0 km/s |
| Age | 1.0+3.1 −0.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star XO-1 is named Moldoveanu. The name was selected in the NameExoWorlds campaign by Romania, during the 100th anniversary of the IAU. Moldoveanu is the highest peak in Romania.
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