All names: SDSS J171955.72+363934.2, WDJ171955.76+363936.32, NLTT 44624, Gaia DR2 1336988963803208192, Gaia DR3 1336988963803208192, 1336988963803208192, LSPM J1719+3639W, LP 277-26, LHS 3283, Wolf 692 B
| Parameter | Unit | Gaia EDR3 | Kilic et al. 2025 | O'Brien et al. 2024 | Vincent et al. 2024 | Simbad |
|---|---|---|---|---|---|---|
| Right ascension | 17 19 55.61 (0.04) | 17 19 55.61 | 17 19 55.76 (0.04) | |||
| Declination | 36 39 28.26 (0.05) | 36 39 28.26 | 36 39 36.32 (0.05) | |||
| Spectral type | DQ | DQpec | DA | DA | ||
| Effective temperature | [K] | 5318.0 (296) | 6727.0 (394) | 5332.0 (80) | ||
| log(g) | [cgs] | 7.80 (0.2) | 8.36 (0.2) | 7.61 (0.05) | ||
| Mass | [M☉] | 0.454 (0.1) | 0.804 (0.1) | 0.376 (0.03) | ||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | -7.38 | |||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| log(N/He) | ||||||
| log(O/He) | ||||||
| log(Na/He) | ||||||
| log(Mg/He) | ||||||
| log(Al/He) | ||||||
| log(Si/He) | ||||||
| log(P/He) | ||||||
| log(S/He) | ||||||
| log(Cl/He) | ||||||
| log(Sc/He) | ||||||
| log(Ti/He) | ||||||
| log(V/He) | ||||||
| log(Cr/He) | ||||||
| log(Mn/He) | ||||||
| log(Fe/He) | ||||||
| log(Co/He) | ||||||
| log(Ni/He) | ||||||
| log(Cu/He) | ||||||
| log(Zn/He) | ||||||
| log(Ga/He) | ||||||
| log(Ge/He) | ||||||
| log(Sr/He) | ||||||
| Parallax | [mas] | 28.54 (0.05) | 28.54 (0.05) | 28.54 | 28.54 (0.05) | |
| Distance | [pc] | 35.04 (0.06) | 35.04 (0.06) | 35.04 | 35.04 (0.06) | |
| Composition | He | |||||
| Proper motion (right ascension) | [mas/yr] | -113.1732527544988 (0.05) | -113.173 (0.05) | |||
| Proper motion (declination) | [mas/yr] | -503.50292219596895 (0.07) | -503.503 (0.07) | |||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | ||||||
| V magnitude | ||||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | ||||||
| g magnitude | ||||||
| r magnitude | ||||||
| i magnitude | ||||||
| z magnitude | ||||||
| G magnitude | 16.95 (0.001) | 16.95 | 16.95 (0.003) | |||
| BP magnitude | 17.03 (0.02) | |||||
| RP magnitude | 15.93 (0.04) | |||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | ||||||
* 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.