This page summarises the information held within TEPCat for the transiting planetary system HAT-P-55. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2015PASP..127..851J | |
| Date of discovery paper | 2015 / 6 / 12 | y / m / d |
| Data/telescope used for discovery | HAT | |
| Right ascension | 17 37 05.52 | h m s |
| Declination | +25 43 52.3 | d m s |
| Right ascension (decimal) | 264.27300 | degrees |
| Declination (decimal) | 25.73119 | degrees |
| V-band apparent magnitude | 13.21 | mag |
| K-band apparent magnitude | 11.63 | mag |
| Transit duration | 0.1223 ( 2.935 ) | day hour |
| Transit depth | 1.8 | % |
| Time of mid-transit | 2458311.92255 ± 0.00013 | HJD or BJD |
| Orbital period | 3.58523130 ± 0.00000051 | days |
| Reference for orbital ephemeris | 2024MNRAS.528.1930K |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5804 ± 37 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.003 +0.049 −0.032 | dex |
| Stellar mass | 1.028 +0.050 −0.048 | Msun |
| Stellar radius | 1.105 +0.018 −0.017 | Rsun |
| Stellar logarithmic surface gravity | 4.363 +0.014 −0.013 | c.g.s. |
| Stellar mean density | 0.760 +0.026 −0.025 ( 1.072 +0.037 −0.035 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.139 −0.0 | |
| Orbital semimajor axis | 0.04628 +0.00074 −0.00072 | AU |
| Planetary mass | 0.596 +0.073 −0.072 ( 189 +23 −22 ) | Mjup Mearth |
| Planetary radius | 1.324 +0.023 −0.022 ( 14.84 + 0.26 − 0.25 ) | Rjup Rearth |
| Planetary surface gravity | 8.4 ± 1.0 2.92 ± 0.05 | m/s2 log(cgs) |
| Planetary mean density | 0.240 +0.030 −0.029 ( 0.318 +0.040 −0.038 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1367 ± 11 | K |
| Reference of detailed study | 2024MNRAS.528.1930K |
HAT-P-55 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/17 John Southworth (Keele University, UK)