All names: Gaia DR3 2256734632327338496, GALEX J183144.5+651131, 2MASS J18314453+6511306, 1RXS J183144.5+651135, SDSSJ183144.53+651130.8, SDSS J183144.53+651130.8, Gaia DR2 2256734632327338496, TIC 233738348, RX J1831.7+6511
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 31 44.54 | 18 31 44.54 (0.03) | ||
| Declination | 65 11 30.58 | 65 11 30.66 (0.03) | ||
| Spectral type | sd | sd+F/K | ||
| 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] | 1.23 (0.04) | 1.15 (0.03) | |
| Distance | [pc] | 811.29 (25) | 870.32 (23) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 4.795 (0.1) | 4.791 (0.05) | |
| Proper motion (declination) | [mas/yr] | -18.773 (0.09) | -18.746 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.68 (0.06) | 15.68 (0.06) | ||
| H magnitude | 15.14 (0.08) | 15.14 (0.08) | ||
| K magnitude | 14.96 (0.1) | 14.96 (0.1) | ||
| u magnitude | 16.98 (0.008) | |||
| g magnitude | 17.04 (0.004) | |||
| r magnitude | 16.85 (0.004) | |||
| i magnitude | 16.66 (0.005) | |||
| z magnitude | 16.38 (0.008) | |||
| G magnitude | 16.40 (0.03) | 16.37 (0.03) | ||
| BP magnitude | 16.52 (0.1) | |||
| RP magnitude | 15.80 (0.1) | |||
| Pan g magnitude | 18.37 (0.02) | |||
| Pan r magnitude | 14.59 (0.2) | |||
| Pan i magnitude | 14.71 (0.01) | |||
| Pan z magnitude | 15.86 | |||
| Pan y magnitude | 16.49 (0.1) | |||
| E(B-V) | 0.039 | |||
* 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.