All names: EQ J1902.3+4850, KIC 11179657, KeplerJ19023+4850, Gaia DR3 2131926181239986432, USNO-B1.0 1388-00296871, USNO-A2.0 1350-10140904, Gaia DR2 2131926181239986432, GALEX J190221.9+485052
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 19 02 21.90 | 19 02 21.94 (0.06) | ||
| Declination | 48 50 52.00 | 48 50 52.20 (0.07) | ||
| Spectral type | sdBV+dM | sdB+dM | ||
| 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] | 0.19 (0.09) | 0.19 (0.07) | |
| Distance | [pc] | 5159.96 (2290) | 5396.65 (2082) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.144 (0.2) | -2.194 (0.09) | |
| Proper motion (declination) | [mas/yr] | -9.382 (0.2) | -8.865 (0.1) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 17.10 | |||
| V magnitude | ||||
| R magnitude | 17.10 | |||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 17.46 (0.002) | 17.43 (0.003) | ||
| BP magnitude | 17.25 (0.02) | |||
| RP magnitude | 17.46 (0.02) | |||
| Pan g magnitude | 17.29 (0.009) | |||
| Pan r magnitude | 17.65 (0.004) | |||
| Pan i magnitude | 17.89 (0.008) | |||
| Pan z magnitude | 18.12 (0.02) | |||
| Pan y magnitude | 18.31 (0.04) | |||
| E(B-V) | 0.034 | |||
* 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.