All names: GALEX J080907.0+442553, Gaia DR2 929014487121174144, UCAC4 673-053159, WD 0805+445, SDSS J080907.04+442552.9, Gaia DR3 929014487121174144, Gaia EDR3 929014482827319552
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|
| Right ascension | 08 09 06.84 (0.08) | 08 09 07.05 (0.03) | 08 09 07.04 (0.02) | 08 09 06.53 | ||
| Declination | 44 25 50.98 (0.07) | 44 25 52.89 (0.03) | 44 25 52.95 (0.02) | 44 25 47.28 | ||
| Spectral type | DA | DA6.2 M | ||||
| 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] | 1.52 (0.1) | 0.21 (0.04) | 0.22 (0.03) | ||
| Distance | [pc] | 657.95 (42) | 4703.07 (916) | 4452.36 (527) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | -9.614032926 (0.1) | 1.418773906 (0.06) | 1.44 (0.03) | ||
| Proper motion (declination) | [mas/yr] | -2.958080736 (0.09) | -4.195485999 (0.05) | -4.119 (0.02) | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | 15.50 (0.05) | |||||
| V magnitude | 15.06 (0.05) | |||||
| R magnitude | 15.37 (0.1) | |||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | 16.46 (0.006) | 22.21 | ||||
| g magnitude | 15.23 (0.003) | 19.53 | ||||
| r magnitude | 15.12 (0.003) | 17.79 | ||||
| i magnitude | 15.13 (0.004) | 16.82 | ||||
| z magnitude | 15.16 (0.005) | 16.31 | ||||
| G magnitude | 17.47 (0.04) | 15.09 | 15.07 (0.003) | |||
| BP magnitude | 18.34 (0.04) | 15.25 | ||||
| RP magnitude | 16.36 (0.007) | 14.78 | ||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.038 | |||||
* 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.