All names: WD 0817+376, SDSS J082108.18+372738.3, SDSS J082108.17+372738.2, WIRED J082108.17+372738.3, Gaia DR2 908048587085834752, LP 258-8, USNO-B1.0 1274-00199920, EQ J0821+3727, NLTT 19351, LSPM J0821+3727
| Parameter | Unit | Simbad |
|---|---|---|
| Right ascension | 08 21 08.15 (0.2) | |
| Declination | 37 27 38.64 (0.2) | |
| Spectral type | DA | |
| 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] | 18.49 (0.2) |
| Distance | [pc] | 54.09 (0.7) |
| Composition | ||
| Proper motion (right ascension) | [mas/yr] | 165.932 (0.3) |
| Proper motion (declination) | [mas/yr] | -152.375 (0.3) |
| Variability | ||
| Magnetic | ||
| Bd | [MG] | |
| Infrared excess (disk) | ||
| Binarity | ||
| B magnitude | 19.40 | |
| V magnitude | ||
| R magnitude | 18.40 | |
| I magnitude | ||
| J magnitude | 17.25 (0.04) | |
| H magnitude | 17.00 (0.04) | |
| K magnitude | 16.85 (0.05) | |
| u magnitude | 20.74 (0.06) | |
| g magnitude | 19.14 (0.01) | |
| r magnitude | 18.42 (0.008) | |
| i magnitude | 18.15 (0.008) | |
| z magnitude | 18.02 (0.02) | |
| G magnitude | 18.49 (0.002) | |
| BP magnitude | ||
| RP magnitude | ||
| Pan g magnitude | ||
| Pan r magnitude | ||
| Pan i magnitude | ||
| Pan z magnitude | ||
| Pan y magnitude |
* 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 (LANL). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.