All names: UCAC2 22593149, GALEXJ20481-2305, WISEA J204810.43-230554.6, UCAC4 335-214609, Gaia DR3 6807068309943508224, WISE J204810.43-230554.4, 2MASS J20481044-2305546, Gaia DR2 6807068309943508224, TIC 76857334, GALEX J204810.4-230554
| 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.