This page summarises the information held within TEPCat for the transiting planetary system HD 21749b. Please see here for descriptions of the quantities given below.
| Quantity | Value | Unit |
|---|---|---|
| Reference of discovery paper | 2019ApJ...875L...7D | |
| Date of discovery paper | 2019 / 1 / 1 | y / m / d |
| Data/telescope used for discovery | TESS | |
| Right ascension | 03 27 00.05 | h m s |
| Declination | −63 30 00.6 | d m s |
| Right ascension (decimal) | 51.75021 | degrees |
| Declination (decimal) | -63.50017 | degrees |
| V-band apparent magnitude | 8.14 | mag |
| K-band apparent magnitude | 5.38 | mag |
| Transit duration | 0.1380 ( 3.312 ) | day hour |
| Transit depth | 0.14 | % |
| Time of mid-transit | 2458350.3122 ± 0.0007 | HJD or BJD |
| Orbital period | 35.6133 ± 0.0005 | days |
| Reference for orbital ephemeris | 2021MNRAS.501.6042G |
| Quantity | Value | Unit |
|---|---|---|
| Stellar effective temperature | 4640 ± 100 | K |
| Stellar metal abundance ([Fe/H] or [M/H]) | +0.003 ± 0.060 | dex |
| Stellar mass | 0.73 ± 0.07 | Msun |
| Stellar radius | 0.695 ± 0.030 | Rsun |
| Stellar logarithmic surface gravity | 4.613 +0.052 −0.061 | c.g.s. |
| Stellar mean density | 2.88 +0.53 −0.40 ( 4.06 +0.75 −0.56 ) | ρsun g cm-3 |
| Orbital eccentricity | 0.0 | |
| Orbital semimajor axis | 0.209 +0.022 −0.021 | AU |
| Planetary mass | 0.0629 ± 0.0085 ( 20.0 ± 2.7 ) | Mjup Mearth |
| Planetary radius | 0.255 +0.019 −0.018 ( 2.86 +0.21 −0.20 ) | Rjup Rearth |
| Planetary surface gravity | m/s2 log(cgs) | |
| Planetary mean density | 3.5 +1.4 −1.1 ( 4.6 +1.9 −1.5 ) | ρjup g cm-3 |
| Planetary equilibrium temperature | 407 +22 −19 | K |
| Reference of detailed study | 2021MNRAS.501.6042G |
HD 21749b does not have an entry in the catalogue of orbital obliquity measurements.
Page generated on 2025/03/12 John Southworth (Keele University, UK)