All names: Gaia DR2 2688225356327106176, Gaia DR3 2688225356327106176, GALEX J213401.5+010805, SDSS J213401.57+010804.8, SDSS J213401.57+010804.7, Gaia EDR3 2688225356327106176, SDSS J213401.58+010804.7, USNO-A2.0 0900-19695563, SDSS J213401.58+010804.70
| Parameter | Unit | Gaia EDR3 | SDSS DR10 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 34 01.58 (1) | 21 34 01.57 | 21 34 01.58 (2) | 21 34 01.57 (1) | |||||
| Declination | 01 08 04.78 (0.9) | 01 08 04.73 | 01 08 04.78 (2) | 01 08 04.74 (0.9) | |||||
| Spectral type | DB | DB | DB | ||||||
| Effective temperature | [K] | 17126.0 | 17000.0 (713) | ||||||
| log(g) | [cgs] | 8.55 | 7.80 (0.2) | ||||||
| Mass | [M☉] | 0.941 | 0.4589999999999999 (0.07) | ||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | -5.139 | ||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 1.02 (1) | 1.02 (1) | ||||||
| Distance | [pc] | 977.19 (1242) | 977.23 (1242) | ||||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 5.21663233 (1) | 5.217 (1) | ||||||
| Proper motion (declination) | [mas/yr] | 2.889493006 (1) | 2.889 (1) | ||||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 19.70 (0.3) | ||||||||
| V magnitude | |||||||||
| R magnitude | 19.30 (0.3) | ||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 20.30 (0.05) | 20.31 (0.05) | 20.33 (0.06) | ||||||
| g magnitude | 20.51 (0.02) | 20.54 (0.03) | 20.48 (0.02) | ||||||
| r magnitude | 20.80 (0.03) | 20.81 (0.03) | 20.67 (0.04) | ||||||
| i magnitude | 20.97 (0.05) | 20.98 (0.05) | 20.80 (0.07) | ||||||
| z magnitude | 21.74 (0.3) | 21.73 (0.3) | 20.98 (0.3) | ||||||
| G magnitude | 20.64 (0.1) | 20.74 | 20.64 (0.01) | ||||||
| BP magnitude | 20.42 (0.1) | 20.69 | |||||||
| RP magnitude | 20.34 (0.2) | 20.28 | |||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| 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.