This page summarises the information held within TEPCat for the transiting planetary system XO-4. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | arXiv:0805.2921 | |
| Date of discovery paper | 2008 / 5 / 19 | y / m / d |
| Data/telescope used for discovery | XO | |
| Right ascension | 07 21 33.17 | h m s |
| Declination | +58 16 05.0 | d m s |
| Right ascension (decimal) | 110.38821 | degrees |
| Declination (decimal) | 58.26806 | degrees |
| V-band apparent magnitude | 10.67 | mag |
| K-band apparent magnitude | 9.41 | mag |
| Transit duration | 0.18448 ( 4.4275 ) | day hour |
| Transit depth | 0.8 | % |
| Time of mid-transit | 2455067.5685 ± 0.0003 | HJD or BJD |
| Orbital period | 4.1250683 ± 0.00000013 | days |
| Reference for orbital ephemeris | 2022ExA....53..547K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 6397 ± 70 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.04 ± 0.05 | dex |
| Stellar mass | 1.293 +0.030 −0.029 | Msun |
| Stellar radius | 1.554 +0.042 −0.030 | Rsun |
| Stellar logarithmic surface gravity | 4.166 +0.013 −0.018 | c.g.s. |
| Stellar mean density | 0.344 +0.016 −0.022 ( 0.485 +0.023 −0.031 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.05485 ± 0.00042 | AU |
| Planetary mass | 1.615 ± 0.10 ( 513 ± 31 ) | Mjup Mearth |
| Planetary radius | 1.317 +0.040 −0.029 ( 14.76 + 0.45 − 0.33 ) | Rjup Rearth |
| Planetary surface gravity | 23.0 +1.8 −1.7 3.36 +0.03 −0.03 | m/s2 log(cgs) |
| Planetary mean density | 0.658 +0.061 −0.063 ( 0.873 +0.081 −0.084 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1641 +25 −21 | K |
| Reference of detailed study | 2016ApJ...820...87V |
| Reference | λ (degrees) |
|---|---|
| Narita et al. (2010) | −46.7 + 8.1 - 6.1 |
Page generated on 2025/03/17 John Southworth (Keele University, UK)