XO-1

For the laptop with the same name, see OLPC XO-1.
XO-1 / Moldoveanu

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[1]
Right ascension 16h 02m 11.8462s[2]
Declination +28° 10′ 10.420″[2]
Apparent magnitude (V) 11.19 ± 0.03[3]
Characteristics
Spectral type G1V[3]
Apparent magnitude (B) 11.85 ± 0.04[3]
Apparent magnitude (V) 11.19 ± 0.03[3]
Apparent magnitude (J) 9.939 ± 0.022[4]
Apparent magnitude (H) 9.601 ± 0.017[4]
Apparent magnitude (K) 9.527 ± 0.015[4]
Variable type Planetary transit variable[3]
Astrometry
Proper motion (μ) RA: −17.349(12) mas/yr[2]
Dec.: 14.780(15) mas/yr[2]
Parallax (π)6.1489 ± 0.0136 mas[2]
Distance530 ± 1 ly
(162.6 ± 0.4 pc)
Absolute magnitude (MV)5.02+0.14
−0.16[5]
Details
Mass1.027+0.057
−0.061[5] M☉
Radius0.94 ± 0.02[6] R☉
Luminosity0.86+0.12
−0.10[5] L☉
Surface gravity (log g)4.50 ± 0.01[7] cgs
Temperature5738 ± 65[7] K
Metallicity [Fe/H]−0.06 ± 0.07[7] dex
Rotational velocity (v sin i)1.1 ± 1.0[7] km/s
Age1.0+3.1
−0.9[5] Gyr
Other designations
Moldoveanu, BD+28 2507, TYC 2041-1657-1, GSC 02041-01657, 2MASS J16021184+2810105[8]
Database references
SIMBADdata

XO-1 is a magnitude 11 G-type main-sequence star located approximately 530 light-years away[2] 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.[3]

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.[9][10][11]

  1. ^ Cite error: The named reference Roman1987 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference McCullough2006 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Skrutskie2006 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Torres2008 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Burke2010 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Torres2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  9. ^ "Romania | NameExoworlds". Archived from the original on 2019-12-18.
  10. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  11. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.