This page summarises the information held within TEPCat for the transiting planetary system GJ 3470. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2012A+A...546A..27B | |
| Date of discovery paper | 2012 / 6 / 26 | y / m / d |
| Data/telescope used for discovery | TRAPPIST | |
| Right ascension | 07 59 05.87 | h m s |
| Declination | +15 23 29.4 | d m s |
| Right ascension (decimal) | 119.77446 | degrees |
| Declination (decimal) | 15.39150 | degrees |
| V-band apparent magnitude | 12.27 | mag |
| K-band apparent magnitude | 7.99 | mag |
| Transit duration | 0.07992 ( 1.9181 ) | day hour |
| Transit depth | 0.7 | % |
| Time of mid-transit | 2456340.72559 ± 0.00010 | HJD or BJD |
| Orbital period | 3.33665266 ± 0.00000030 | days |
| Reference for orbital ephemeris | 2022ApJ...931L..15S |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 3577 +19 −51 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.420 ± 0.019 | dex |
| Stellar mass | 0.476 ± 0.019 | Msun |
| Stellar radius | 0.513 +0.014 −0.008 | Rsun |
| Stellar logarithmic surface gravity | 4.678 +0.040 −0.041 | c.g.s. |
| Stellar mean density | 3.39 +0.30 −0.32 ( 4.78 +0.42 −0.45 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.017 +0.016 −0.012 | |
| Orbital semimajor axis | 0.03557 +0.00096 −0.00100 | AU |
| Planetary mass | 0.035 ± 0.003 ( 11.13 ± 0.95 ) | Mjup Mearth |
| Planetary radius | 0.388 +0.017 −0.013 ( 4.35 +0.19 −0.15 ) | Rjup Rearth |
| Planetary surface gravity | 5.73 +0.59 −0.58 2.76 +0.04 −0.05 | m/s2 log(cgs) |
| Planetary mean density | 0.596 +0.074 −0.076 ( 0.791 +0.098 −0.101 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 673 +10 −13 | K |
| Reference of detailed study | 2026MNRAS.545S2063M |
| Reference | λ (degrees) |
|---|---|
| Stefánsson et al. (2022) | 101 + 29 - 14 |
Page generated on 2026/01/29 John Southworth (Keele University, UK)