All names: FBS B 239, FBS 0634+442, Gaia DR2 964250914214814336, GALEX J063834.4+441125, FBS0634+442, TIC 190377138, Gaia DR3 964250914214814336, 2MASS J06383454+4411257
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 06 38 34.56 | 06 38 34.55 (0.03) | ||
| Declination | 44 11 26.20 | 44 11 25.71 (0.03) | ||
| Spectral type | sd | 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] | 1.09 (0.05) | 0.94 (0.04) | |
| Distance | [pc] | 914.75 (43) | 1066.67 (49) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.121 (0.09) | -0.193 (0.04) | |
| Proper motion (declination) | [mas/yr] | -5.96 (0.08) | -6.081 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.87 | |||
| V magnitude | 15.11 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.07 (0.05) | 15.07 (0.05) | ||
| H magnitude | 15.30 (0.1) | 15.30 (0.1) | ||
| K magnitude | 15.27 (0.2) | 15.27 (0.2) | ||
| u magnitude | 14.56 (0.003) | |||
| g magnitude | 14.54 (0.003) | |||
| r magnitude | 14.92 (0.003) | |||
| i magnitude | 15.19 (0.003) | |||
| z magnitude | 15.46 (0.005) | |||
| G magnitude | 14.77 (0.0008) | 14.75 (0.003) | ||
| BP magnitude | 14.63 (0.01) | |||
| RP magnitude | 14.89 (0.004) | |||
| Pan g magnitude | 14.64 (0.003) | |||
| Pan r magnitude | 14.95 (0.007) | |||
| Pan i magnitude | 15.23 (0.004) | |||
| Pan z magnitude | 15.45 (0.004) | |||
| Pan y magnitude | 15.60 (0.007) | |||
| E(B-V) | 0.110 | |||
* 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.