This page summarises the information held within TEPCat for the transiting planetary system HATS-21. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | arXiv:1607.00322 | |
| Date of discovery paper | 2016 / 7 / 4 | y / m / d |
| Data/telescope used for discovery | HATS | |
| Right ascension | 18 40 44.40 | h m s |
| Declination | −58 27 33.3 | d m s |
| Right ascension (decimal) | 280.18500 | degrees |
| Declination (decimal) | -58.45925 | degrees |
| V-band apparent magnitude | 12.19 | mag |
| K-band apparent magnitude | 10.53 | mag |
| Transit duration | 0.0824 ( 1.978 ) | day hour |
| Transit depth | 1.2 | % |
| Time of mid-transit | 2457109.22538 ± 0.00057 | HJD or BJD |
| Orbital period | 3.5543973 ± 0.0000058 | days |
| Reference for orbital ephemeris | arXiv:1607.00322 |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 5695 ± 67 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.300 ± 0.040 | dex |
| Stellar mass | 1.080 ± 0.026 | Msun |
| Stellar radius | 1.021 +0.089 −0.036 | Rsun |
| Stellar logarithmic surface gravity | 4.453 ± 0.055 | c.g.s. |
| Stellar mean density | 1.00 +0.11 −0.23 ( 1.41 +0.16 −0.32 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 +0.149 −0.0 | |
| Orbital semimajor axis | 0.04676 ± 0.00038 | AU |
| Planetary mass | 0.332 +0.040 −0.030 ( 105.54 +12.72 −9.54 ) | Mjup Mearth |
| Planetary radius | 1.123 +0.147 −0.054 ( 12.59 + 1.65 − 0.61 ) | Rjup Rearth |
| Planetary surface gravity | 6.5 +1.1 −1.4 2.81 +0.07 −0.11 | m/s2 log(cgs) |
| Planetary mean density | 0.219 +0.047 −0.065 ( 0.291 +0.062 −0.086 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 1284 +55 −31 | K |
| Reference of detailed study | arXiv:1607.00322 |
HATS-21 does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2024/09/04 John Southworth (Keele University, UK)