XO-2

For other uses, see XO-2 (disambiguation).
XO-2
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx[1]
XO-2S
Right ascension 07h 48m 07.4814s[2]
Declination +50° 13′ 03.2554″[2]
Apparent magnitude (V) 11.12±0.03[3]
XO-2N
Right ascension 07h 48m 06.4723s[4]
Declination +50° 13′ 32.9206″[4]
Apparent magnitude (V) 11.18±0.03[3]
Characteristics
Spectral type K0V + K0V[3]
Astrometry
XO-2S
Radial velocity (Rv)46.94±0.27[2] km/s
Proper motion (μ) RA: −29.308(15) mas/yr[2]
Dec.: −154.233(13) mas/yr[2]
Parallax (π)6.6721 ± 0.0151 mas[2]
Distance489 ± 1 ly
(149.9 ± 0.3 pc)
Absolute magnitude (MV)5.74[5]
XO-2N
Radial velocity (Rv)47.45±0.44[4] km/s
Proper motion (μ) RA: −29.552(15) mas/yr[4]
Dec.: −154.227(11) mas/yr[4]
Parallax (π)6.6588 ± 0.0158 mas[4]
Distance490 ± 1 ly
(150.2 ± 0.4 pc)
Absolute magnitude (MV)5.74[5]
Details[6]
XO-2S
Mass0.98±0.05 M☉
Radius1.02+0.09
−0.06 R☉
Luminosity0.79±0.14 L☉
Surface gravity (log g)4.420±0.094 cgs
Temperature5,325±37 K
Metallicity [Fe/H]0.32±0.08 dex
Rotation26.0±0.6 d
Rotational velocity (v sin i)1.5±0.3 km/s
Age7.1+2.5
−2.9 Gyr
XO-2N
Mass0.96±0.05 M☉
Radius0.998+0.033
−0.032 R☉
Luminosity0.70±0.04 L☉
Surface gravity (log g)4.43±0.10 cgs
Temperature5,290±18 K
Metallicity [Fe/H]0.37±0.07 dex
Rotation41.6±1.1 d
Rotational velocity (v sin i)1.07±0.09 km/s
Age7.8+1.2
−1.3 Gyr
Other designations
XO-2S: LSPM J0748+5013S, TYC 3413-210-1, GSC 03413-00210, 2MASS J07480748+5013032[7]
XO-2N: BD+50 1471, LSPM J0748+5013N, TOI-1720, TIC 356473034, TYC 3413-5-1, GSC 03413-00005, 2MASS J07480647+5013328[8]
Database references
SIMBADXO-2S
XO-2N

XO-2 is a binary star system about 490 light-years (150 parsecs) away in the constellation Lynx. It consists of two components, XO-2N and XO-2S, both of which host planetary systems.[9]

  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 XO-2S was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Burke2007 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Gaia DR3 XO-2N was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference benavides2010 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Damasso et al was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad XO-2S was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Simbad XO-2N was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Desidera2014 was invoked but never defined (see the help page).