All names: Gaia DR3 6796092984875283072, GALEX J202852.1-314540, UCAC4 292-215518, EC 20257-3155, Gaia DR2 6796092984875283072, EC20257-3155, 2MASS J20285218-3145411, TIC 34862340
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 28 52.10 | 20 28 52.19 (0.03) | ||
| Declination | -31 45 40.14 | -31 45 41.16 (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] | 0.71 (0.06) | 0.68 (0.04) | |
| Distance | [pc] | 1403.11 (123) | 1468.21 (87) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 4.279 (0.1) | 4.363 (0.04) | |
| Proper motion (declination) | [mas/yr] | -6.009 (0.07) | -5.895 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.69 | |||
| V magnitude | 15.74 | |||
| R magnitude | 15.82 (0.2) | |||
| I magnitude | ||||
| J magnitude | 16.20 (0.1) | 16.20 (0.1) | ||
| H magnitude | 16.06 | |||
| K magnitude | 15.39 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.79 (0.0008) | 15.77 (0.003) | ||
| BP magnitude | 15.63 (0.007) | |||
| RP magnitude | 15.90 (0.005) | |||
| Pan g magnitude | 15.51 | |||
| Pan r magnitude | 15.92 | |||
| Pan i magnitude | 16.23 (0.003) | |||
| Pan z magnitude | 16.50 | |||
| Pan y magnitude | 16.69 | |||
| E(B-V) | 0.051 | |||
* 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.