All names: Gaia DR3 2291517751390003584, SDSS J194253.97+780521.53, SDSS J194253.95+780521.5, Gaia DR2 2291517751389381888, GALEX J194254.3+780521, SDSS J194253.97+780521.5, Gaia EDR3 2291517751390003584
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 19 42 53.94 (0.2) | 19 42 53.95 | 19 42 53.94 (0.2) | 19 42 53.96 (0.2) | |||||
| Declination | 78 05 21.48 (0.2) | 78 05 21.53 | 78 05 21.48 (0.3) | 78 05 21.55 (0.2) | |||||
| Spectral type | DB: | DC | |||||||
| Effective temperature | [K] | 10079.0 | 13421.0 (1000) | ||||||
| log(g) | [cgs] | 9.21 | 9.00 (0.5) | ||||||
| Mass | [M☉] | 1.265 | 1.166 (0.3) | ||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | <-6.015 | ||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.34 (0.2) | 0.38 (0.3) | 0.34 (0.2) | |||||
| Distance | [pc] | 2958.60 (1730) | 2645.90 (1828) | 2958.58 (1730) | |||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -3.99152843 (0.2) | -4.023585285 (0.4) | -3.992 (0.2) | |||||
| Proper motion (declination) | [mas/yr] | -4.634542572 (0.2) | -4.186976652 (0.5) | -4.635 (0.2) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 18.49 (0.02) | 18.49 (0.02) | 18.49 (0.02) | ||||||
| g magnitude | 18.93 (0.01) | 18.93 (0.01) | 18.93 (0.01) | ||||||
| r magnitude | 19.42 (0.02) | 19.42 (0.02) | 19.42 (0.02) | ||||||
| i magnitude | 19.79 (0.03) | 19.79 (0.03) | 19.79 (0.03) | ||||||
| z magnitude | 20.38 (0.3) | 20.38 (0.2) | 20.38 (0.2) | ||||||
| G magnitude | 19.21 (0.03) | 19.23 | 19.21 (0.004) | ||||||
| BP magnitude | 19.11 (0.03) | 18.99 | |||||||
| RP magnitude | 19.59 (0.06) | 19.55 | |||||||
| Pan g magnitude | 19.03 (0.03) | ||||||||
| Pan r magnitude | 19.44 (0.009) | ||||||||
| Pan i magnitude | 19.79 (0.01) | ||||||||
| Pan z magnitude | 19.99 (0.04) | ||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.127 | ||||||||
* 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.