This page summarises the information held within TEPCat for the transiting planetary system XO-2. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2007ApJ...671.2115B | |
| Date of discovery paper | 2007 / 4 / 30 | y / m / d |
| Data/telescope used for discovery | XO | |
| Right ascension | 07 48 06.47 | h m s |
| Declination | +50 13 33.0 | d m s |
| Right ascension (decimal) | 117.02696 | degrees |
| Declination (decimal) | 50.22583 | degrees |
| V-band apparent magnitude | 11.25 | mag |
| K-band apparent magnitude | 9.31 | mag |
| Transit duration | 0.11260 ( 2.7024 ) | day hour |
| Transit depth | 1.4 | % |
| Time of mid-transit | 2458843.218463 ± 0.000069 | HJD or BJD |
| Orbital period | 2.615859462 ± 0.000000054 | days |
| Reference for orbital ephemeris | 2024MNRAS.530.2475Y |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5332 ± 57 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.43 ± 0.05 | dex |
| Stellar mass | 0.96 ± 0.05 | Msun |
| Stellar radius | 0.998 +0.032 −0.033 | Rsun |
| Stellar logarithmic surface gravity | 4.44 ± 0.08 | c.g.s. |
| Stellar mean density | 0.960 +0.037 −0.034 ( 1.355 +0.052 −0.048 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.006 −0.0 | |
| Orbital semimajor axis | 0.03616 +0.00119 −0.00247 | AU |
| Planetary mass | 0.597 ± 0.021 ( 189.78 ± 6.68 ) | Mjup Mearth |
| Planetary radius | 1.019 ± 0.031 ( 11.42 ± 0.35 ) | Rjup Rearth |
| Planetary surface gravity | 14.13 +10.1 −0.94 3.15 +0.23 −0.03 | m/s2 log(cgs) |
| Planetary mean density | 0.528 +0.054 −0.048 ( 0.700 +0.072 −0.064 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1328 +17 −28 | K |
| Reference of detailed study | 2015A+A...575A.111D |
| Reference | λ (degrees) |
|---|---|
| Narita et al. (2011) | 10 ± 72 |
| Damasso et al. (2015) | 7 ± 11 |
Page generated on 2025/03/24 John Southworth (Keele University, UK)