All names: EC 20443-3134, Gaia DR2 6794011338783487488, TIC 441434262, GALEX J204722.7-312323, 2MASS J20472278-3123235, EC20443-3134, UCAC4 294-224212, Gaia DR3 6794011338783487488
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 47 22.75 | 20 47 22.80 (0.05) | ||
| Declination | -31 23 23.28 | -31 23 23.53 (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] | 0.46 (0.08) | 0.45 (0.06) | |
| Distance | [pc] | 2177.70 (376) | 2239.14 (295) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.504 (0.1) | 3.653 (0.06) | |
| Proper motion (declination) | [mas/yr] | 3.71 (0.1) | 3.723 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.83 (0.08) | |||
| V magnitude | 15.96 (0.2) | |||
| R magnitude | 16.20 (0.1) | |||
| I magnitude | ||||
| J magnitude | 16.36 (0.09) | 16.36 (0.09) | ||
| H magnitude | 16.65 | |||
| K magnitude | 16.23 | |||
| u magnitude | ||||
| g magnitude | 15.84 (0.1) | |||
| r magnitude | 16.06 (0.01) | |||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.99 (0.001) | 15.97 (0.003) | ||
| BP magnitude | 15.82 (0.005) | |||
| RP magnitude | 16.18 (0.004) | |||
| Pan g magnitude | 15.90 | |||
| Pan r magnitude | 16.24 | |||
| Pan i magnitude | 16.51 (0.003) | |||
| Pan z magnitude | 16.72 | |||
| Pan y magnitude | 16.92 | |||
| E(B-V) | 0.047 | |||
* 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.