All names: UCAC2 36206604, WISEA J204234.79+121034.0, Gaia DR2 1755143024075390208, TIC 341157482, GALEXJ20425+1210, 2MASS J20423479+1210343, UCAC4 511-131268, WISE J204234.78+121034.0, Gaia DR3 1755143024075390208, GALEX J204234.7+121035
| 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.