This page summarises the information held within TEPCat for the transiting planetary system GJ 9827d. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2017AJ....154..266N | |
| Date of discovery paper | 2017 / 9 / 6 | y / m / d |
| Data/telescope used for discovery | K2 | |
| Right ascension | 23 27 04.84 | h m s |
| Declination | −01 17 10.6 | d m s |
| Right ascension (decimal) | 351.77017 | degrees |
| Declination (decimal) | -1.28628 | degrees |
| V-band apparent magnitude | 10.51 | mag |
| K-band apparent magnitude | 7.19 | mag |
| Transit duration | 0.06667 ( 1.6001 ) | day hour |
| Transit depth | 0.08 | % |
| Time of mid-transit | 2457740.96115 ± 0.00045 | HJD or BJD |
| Orbital period | 6.201470 ± 0.000062 | days |
| Reference for orbital ephemeris | 2019MNRAS.484.3731R |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4305 ± 49 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | −0.50 ± 0.08 | dex |
| Stellar mass | 0.606 +0.020 −0.014 | Msun |
| Stellar radius | 0.602 +0.005 −0.004 | Rsun |
| Stellar logarithmic surface gravity | 4.72 ± 0.10 | c.g.s. |
| Stellar mean density | 3.47 +0.27 −0.73 ( 4.90 +0.38 −1.03 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.05591 +0.00059 −0.00041 | AU |
| Planetary mass | 0.0127 ± 0.0026 ( 4.04 ± 0.83 ) | Mjup Mearth |
| Planetary radius | 0.1804 +0.0041 −0.0038 ( 2.022 +0.046 −0.043 ) | Rjup Rearth |
| Planetary surface gravity | 5.34 +2.19 −1.75 2.7 +0.1 −0.2 | m/s2 log(cgs) |
| Planetary mean density | 2.02 +0.44 −0.43 ( 2.68 +0.58 −0.57 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 646 +26 −15 | K |
| Reference of detailed study | 2019MNRAS.484.3731R |
GJ 9827d does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2023/09/01 John Southworth (Keele University, UK)