All names: LAMOST J081917.72+423338.7, Gaia DR2 915859960070594176, SDSS J081917.71+423338.7, GALEX J081917.7+423339, FBS B 251, HS0815+4243, KUV 08159+4243, Gaia EDR3 915859960070594176, Gaia DR3 915859960070594176, HS 0815+4243, UCAC4 663-053645, SDSS J081917.72+423338.70, SDSS J081917.72+423338.7, FBS 0815+427, V* DV Lyn
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 19 17.72 (0.05) | 08 19 17.72 | 08 19 17.72 | 08 19 17.71 | 08 19 17.72 (0.08) | 08 19 17.72 (0.05) | 08 19 17.72 | ||||
| Declination | 42 33 38.68 (0.04) | 42 33 38.72 | 42 33 38.72 | 42 33 38.76 | 42 33 38.68 (0.06) | 42 33 38.73 (0.04) | 42 33 38.76 | ||||
| Spectral type | sdBV | DAO | sdOB | SDO | |||||||
| Effective temperature | [K] | 33800.0 (800) | 33511.0 (201) | 34332.0 (234) | |||||||
| log(g) | [cgs] | 5.90 (0.1) | 5.61 (0.03) | 5.81 (0.04) | |||||||
| Mass | [M☉] | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 0.49 (0.06) | 0.71 (0.1) | 0.71 (0.1) | 0.49 (0.06) | ||||||
| Distance | [pc] | 2023.35 (260) | 1409.64 (212) | 1409.69 (212) | 2023.47 (260) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 2.343371119 (0.06) | 2.406 (0.1) | 2.406276531 (0.1) | 2.343 (0.06) | 1.7 | |||||
| Proper motion (declination) | [mas/yr] | -3.084284598 (0.05) | -3.135 (0.1) | -3.135097759 (0.1) | -3.084 (0.05) | -1.7 | |||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 16.02 (0.1) | ||||||||||
| V magnitude | 16.37 (0.1) | ||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 15.70 (0.004) | 15.70 (0.004) | 15.70 (0.004) | 15.72 (0.02) | 15.70 (0.004) | 15.69 (0.02) | |||||
| g magnitude | 15.96 (0.003) | 15.96 (0.003) | 15.96 (0.003) | 15.97 (0.02) | 15.96 (0.003) | 15.96 (0.02) | |||||
| r magnitude | 16.45 (0.004) | 16.45 (0.004) | 16.45 (0.004) | 16.45 (0.02) | 16.45 (0.004) | 16.43 (0.01) | |||||
| i magnitude | 16.78 (0.005) | 16.78 (0.005) | 16.78 (0.005) | 16.78 (0.02) | 16.78 (0.005) | 16.77 (0.02) | |||||
| z magnitude | 17.07 (0.01) | 17.07 (0.01) | 17.07 (0.01) | 17.07 (0.02) | 17.07 (0.01) | 17.06 (0.02) | |||||
| G magnitude | 16.22 (0.004) | 16.24 (0.002) | 16.24 | 16.22 (0.003) | |||||||
| BP magnitude | 16.09 (0.004) | 15.99 (0.02) | 15.99 | ||||||||
| RP magnitude | 16.47 (0.01) | 16.46 (0.01) | 16.46 | ||||||||
| Pan g magnitude | 16.07 (0.003) | 16.07 (0.003) | |||||||||
| Pan r magnitude | 16.46 (0.003) | 16.46 (0.003) | |||||||||
| Pan i magnitude | 16.80 (0.002) | 16.80 (0.002) | |||||||||
| Pan z magnitude | 17.07 (0.004) | 17.07 (0.004) | |||||||||
| Pan y magnitude | 17.27 (0.007) | 17.27 (0.007) | |||||||||
| E(B-V) | 0.036 | ||||||||||
* 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.