All names: TIC 341157482, UCAC2 36206604, Gaia DR2 1755143024075390208, UCAC4 511-131268, GALEX J204234.7+121035, WISE J204234.78+121034.0, WISEA J204234.79+121034.0, GALEXJ20425+1210, 2MASS J20423479+1210343, Gaia DR3 1755143024075390208
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 42 34.71 | 20 42 34.79 (0.03) | ||
| Declination | 12 10 35.56 | 12 10 34.16 (0.02) | ||
| 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] | 0.98 (0.07) | 0.92 (0.04) | |
| Distance | [pc] | 1018.85 (68) | 1090.27 (43) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.237 (0.09) | -1.157 (0.04) | |
| Proper motion (declination) | [mas/yr] | -5.212 (0.07) | -5.064 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.19 (0.04) | |||
| V magnitude | 14.30 (0.02) | |||
| R magnitude | 14.51 (0.2) | |||
| I magnitude | ||||
| J magnitude | 14.64 (0.03) | 14.64 (0.03) | ||
| H magnitude | 14.73 (0.05) | 14.73 (0.05) | ||
| K magnitude | 14.94 (0.1) | 14.94 (0.1) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | 14.51 (0.03) | |||
| i magnitude | 14.89 (0.01) | |||
| z magnitude | ||||
| G magnitude | 14.29 (0.001) | 14.27 (0.003) | ||
| BP magnitude | 14.16 (0.005) | |||
| RP magnitude | 14.42 (0.003) | |||
| Pan g magnitude | 14.13 (0.003) | |||
| Pan r magnitude | 14.47 (0.005) | |||
| Pan i magnitude | 14.79 (0.006) | |||
| Pan z magnitude | 14.99 (0.004) | |||
| Pan y magnitude | 15.13 (0.005) | |||
| E(B-V) | 0.094 | |||
* 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.