All names: GALEX J204810.4-230554, UCAC2 22593149, TIC 76857334, UCAC4 335-214609, GALEXJ20481-2305, WISE J204810.43-230554.4, 2MASS J20481044-2305546, WISEA J204810.43-230554.6, Gaia DR2 6807068309943508224, Gaia DR3 6807068309943508224
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 48 10.42 | 20 48 10.43 (0.02) | ||
| Declination | -23 05 54.12 | -23 05 54.58 (0.01) | ||
| Spectral type | sdB+MS | 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] | 1.18 (0.05) | 1.14 (0.02) | |
| Distance | [pc] | 846.10 (35) | 876.50 (17) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 1.641 (0.07) | 1.564 (0.02) | |
| Proper motion (declination) | [mas/yr] | -1.865 (0.05) | -2.022 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.00 (0.01) | |||
| V magnitude | 12.81 (0.01) | |||
| R magnitude | 12.88 (0.1) | |||
| I magnitude | ||||
| J magnitude | 12.18 (0.03) | 12.18 (0.03) | ||
| H magnitude | 11.96 (0.02) | 11.96 (0.02) | ||
| K magnitude | 11.97 (0.02) | 11.97 (0.02) | ||
| u magnitude | ||||
| g magnitude | 12.84 (0.01) | |||
| r magnitude | 12.84 (0.01) | |||
| i magnitude | 12.78 (0.01) | |||
| z magnitude | ||||
| G magnitude | 12.75 (0.0003) | 12.73 (0.003) | ||
| BP magnitude | 12.83 (0.004) | |||
| RP magnitude | 12.51 (0.0007) | |||
| Pan g magnitude | 13.07 | |||
| Pan r magnitude | 12.90 | |||
| Pan i magnitude | 12.90 | |||
| Pan z magnitude | 12.95 | |||
| Pan y magnitude | 12.92 (0.002) | |||
| E(B-V) | 0.035 | |||
* 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.