All names: LSPM J0251+7341, WD 0246+735, SDSS J025151.53+734134.3, SDSS J025151.52+734134.2, USNO-B1.0 1636-00032583, Gaia DR3 547501815051141248, LP 30-265, NLTT 9054, WDJ025151.28+734135.13, J0251+7341, Gaia DR2 547501815051141248, GALEX J025151.3+734134, EGGR 474, G245-58, WD 0246+734, WD 0246+73, 0246+734, Gaia EDR3 547501815051141248, G 245-58
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Coutu et al. 2019 | Leggett et al. 2018 | Gaia DR2 | Stilism | Bergfors et al. 2014 | Sion et al. 1990 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 51 52.00 (0.05) | 02 51 51.28 | 02 51 51.98 (0.07) | 02 51 52.00 | 02 51 51.28 (0.05) | 02 51 51.98 | 02 51 49.49 | ||||||||
| Declination | 73 41 32.79 (0.05) | 73 41 35.13 | 73 41 32.86 (0.07) | 73 41 32.79 | 73 41 35.13 (0.05) | 73 41 32.86 | 73 41 38.76 | ||||||||
| Spectral type | DZ | DZ | DZ | DZ6.5 | DZ | DZ | DZ | DZ6 | DZ6 | ||||||
| Effective temperature | [K] | 7538.0 (48) | 7618.0 (39) | 7531.0 (155) | 7709.0 (106) | 8250.0 | 8600.0 | 7422.0 (63) | |||||||
| log(g) | [cgs] | 8.08 (0.01) | 8.10 (0.01) | 8.07 | 7.76 (0.09) | 8.03 (0.01) | |||||||||
| Mass | [M☉] | 0.623 (0.009) | 0.635 (0.009) | 0.6173 | 0.444 (0.06) | 0.595 (0.01) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 1.5100 | 1.4200 | 0.9020 (0.1) | |||||||||||
| log(H/He) | -3.0 | -3.0 | <-4.1152 | ||||||||||||
| log(C/He) | |||||||||||||||
| log(Ca/He) | -9.38 | -9.32 | -9.9667 (0.08) | ||||||||||||
| log(Ca/H) | -9.7 | ||||||||||||||
| 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] | 16.36 (0.07) | 16.29 (0.08) | 16.29 | 13.14 (0.9) | 16.29 (0.08) | 16.36 | 16.36 (0.07) | 16.29 (0.08) | ||||||
| Distance | [pc] | 61.12 (0.2) | 61.39 (0.3) | 61.38 (0.3) | 76.10 (5) | 61.38 (0.3) | 61.12 | 61.12 (0.2) | 61.38 (0.3) | ||||||
| Composition | He | He | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 190.208361 (0.06) | 189.8943276 (0.1) | 190.208 (0.06) | 189.8943276 | ||||||||||
| Proper motion (declination) | [mas/yr] | -146.4320094 (0.07) | -146.2280933 (0.1) | -146.432 (0.07) | -146.2280933 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | yes | ||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 17.60 | ||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | 17.00 | ||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 16.93 (0.05) | 16.93 | |||||||||||||
| H magnitude | 16.85 (0.05) | 16.85 | |||||||||||||
| K magnitude | 16.84 (0.05) | 16.84 | |||||||||||||
| u magnitude | 17.68 (0.01) | 17.68 (0.01) | 17.68 (0.01) | ||||||||||||
| g magnitude | 17.24 (0.005) | 17.24 (0.005) | |||||||||||||
| r magnitude | 17.19 (0.005) | 17.19 (0.005) | |||||||||||||
| i magnitude | 17.27 (0.006) | 17.27 (0.006) | |||||||||||||
| z magnitude | 17.44 (0.02) | 17.44 (0.02) | |||||||||||||
| G magnitude | 17.16 (0.006) | 17.18 | 17.16 | 17.16 (0.003) | 17.18 | ||||||||||
| BP magnitude | 17.27 (0.006) | 17.27 | 17.27 | ||||||||||||
| RP magnitude | 16.97 (0.008) | 16.97 | 16.97 | ||||||||||||
| Pan g magnitude | 17.26 (0.004) | 17.26 (0.004) | |||||||||||||
| Pan r magnitude | 17.23 (0.005) | 17.23 (0.004) | |||||||||||||
| Pan i magnitude | 17.30 (0.004) | 17.30 (0.004) | |||||||||||||
| Pan z magnitude | 17.43 (0.009) | 17.43 (0.009) | |||||||||||||
| Pan y magnitude | 17.52 (0.01) | 17.52 (0.01) | |||||||||||||
| E(B-V) | 0.002 | ||||||||||||||
* 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.