All names: SDSS J221239.98+123500.2, GALEX J221239.9+123501, Gaia DR2 2727996379825507200, Gaia DR3 2727996379825507200, USNO-A2.0 0975-20836676, SDSS J221239.98+123500.1, SDSS J221239.99+123500.2
| Parameter | Unit | Vincent et al. 2024 | Simbad |
|---|---|---|---|
| Right ascension | 22 12 39.96 | 22 12 39.99 (0.1) | |
| Declination | 12 34 59.72 | 12 35 00.24 (0.1) | |
| Spectral type | DA | DA | |
| Effective temperature | [K] | 10530.0 (304) | |
| log(g) | [cgs] | 7.80 (0.05) | |
| Mass | [M☉] | 0.494 (0.04) | |
| log(Luminosity) | [L☉] | ||
| Cooling age | [Gyr] | ||
| log(H/He) | |||
| log(C/He) | |||
| log(Ca/He) | |||
| log(Ca/H) | |||
| Parallax | [mas] | 5.71 | 5.71 (0.1) |
| Distance | [pc] | 175.09 | 175.09 (4) |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | -28.458 (0.1) | |
| Proper motion (declination) | [mas/yr] | -32.323 (0.1) | |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | |||
| V magnitude | |||
| R magnitude | |||
| I magnitude | |||
| J magnitude | |||
| H magnitude | |||
| K magnitude | |||
| u magnitude | 18.45 (0.01) | ||
| g magnitude | 17.95 (0.006) | ||
| r magnitude | 18.04 (0.007) | ||
| i magnitude | 18.22 (0.009) | ||
| z magnitude | 18.43 (0.03) | ||
| G magnitude | 17.98 | 17.98 (0.003) | |
| BP magnitude | |||
| RP magnitude | |||
| Pan g magnitude | |||
| Pan r magnitude | |||
| Pan i magnitude | |||
| Pan z magnitude | |||
| Pan y magnitude | |||
| E(B-V) | |||
* 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.