All names: 2MASS J20203384-4549423, EC 20170-4559, TIC 1990297396, Gaia DR2 6669783017518023168, EC20170-4559, Gaia DR3 6669783017518023168, GALEX J202033.8-454942, TIC 129543760
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 20 33.89 | 20 20 33.96 (0.04) | ||
| Declination | -45 49 41.27 | -45 49 42.68 (0.03) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.40 (0.08) | 0.27 (0.06) | |
| Distance | [pc] | 2509.41 (530) | 3750.94 (903) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.76 (0.1) | -2.493 (0.06) | |
| Proper motion (declination) | [mas/yr] | -15.015 (0.08) | -15.041 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.41 | |||
| V magnitude | 16.53 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.82 (0.2) | 16.82 (0.2) | ||
| H magnitude | 16.51 | |||
| K magnitude | 16.33 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.62 (0.0009) | 16.59 (0.003) | ||
| BP magnitude | 16.42 (0.008) | |||
| RP magnitude | 16.85 (0.005) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.025 | |||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.