All names: Gaia DR2 3709565658737443200, 12476+0646, SDSS J124739.05+064604.5, Gaia EDR3 3709565658737443200, SDSS J124739.05+064604.6, SDSS J1247+06, USNO-B1.0 0967-00235680, ULAS J124738.94+064604.8, LSPM J1247+0646, SDSS J124739.04+064604.5, WD 1245+070.1, Gaia DR3 3709565658737443200, J1247+0646, WDJ124739.13+064604.30, PM J12476+0646, WD 1245+070
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Blouin & Dufour 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Leggett et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 47 38.72 (0.2) | 12 47 39.05 | 12 47 38.73 (0.2) | 12 47 38.72 | 12 47 39.13 (0.2) | 12 47 38.73 | 12 47 39.14 | 12 47 39.05 | |||||||||
| Declination | 06 46 05.43 (0.1) | 06 46 04.57 | 06 46 05.39 (0.1) | 06 46 05.43 | 06 46 04.30 (0.1) | 06 46 05.39 | 06 46 02.28 | 06 46 04.57 | |||||||||
| Spectral type | DQ | DQ | DQpec | DQpec | DQpec | DA: | DQpec | DQ | DQpec9.8 | DQPEC | DQ | ||||||
| Effective temperature | [K] | 4685.0 (12) | 4772.0 (20) | 4545.0 (31) | 5000.0 | 5120.0 | 4106.0 (90) | 6300.0 (2) | |||||||||
| log(g) | [cgs] | 8.00 (0.02) | 8.14 (0.02) | 7.93 (0.03) | 8.00 (0) | 7.60 (0.05) | 9.96 (0.05) | ||||||||||
| Mass | [M☉] | 0.57 (0.01) | 0.657 (0.02) | 0.526 (0.02) | 0.57 (0.1) | 0.361 (0.03) | |||||||||||
| log(Luminosity) | [L☉] | -4.06 | |||||||||||||||
| Cooling age | [Gyr] | 7.2500 | 5.6000 | ||||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | -7.49 | -7.11 | -7.5 (0.02) | -8.0 | |||||||||||||
| 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] | 19.23 (0.2) | 19.06 (0.3) | 19.06 (0.3) | 19.06 (0.3) | 19.23 | 19.23 (0.2) | 19.06 (0.3) | |||||||||
| Distance | [pc] | 52.00 (0.6) | 52.47 (0.8) | 52.47 (0.8) | 52.47 (0.8) | 66.80 (0.6) | 60.00 | 52.00 | 52.00 (0.6) | 52.47 (0.8) | |||||||
| Composition | He | He | He | He | H+He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -383.4445319 (0.3) | -383.4739366 (0.7) | -383.445 (0.3) | -383.474 | ||||||||||||
| Proper motion (declination) | [mas/yr] | 70.2584611 (0.2) | 70.36284942 (0.3) | 70.258 (0.2) | 70.363 | ||||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 20.20 | ||||||||||||||||
| V magnitude | |||||||||||||||||
| R magnitude | 18.50 | ||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 17.55 (0.04) | 17.54 (0.03) | |||||||||||||||
| H magnitude | 17.54 (0.04) | 17.49 (0.04) | |||||||||||||||
| K magnitude | 17.35 (0.05) | 17.54 (0.1) | |||||||||||||||
| u magnitude | 20.95 (0.08) | 21.05 (0.09) | 20.95 (0.08) | 20.93 | 20.95 (0.08) | 20.95 (0.08) | 20.89 | 20.93 (0.09) | |||||||||
| g magnitude | 20.03 (0.02) | 20.03 (0.02) | 20.03 | 20.03 (0.02) | 20.03 (0.02) | 20.04 | 20.04 (0.02) | ||||||||||
| r magnitude | 18.68 (0.009) | 18.68 (0.009) | 18.67 | 18.68 (0.009) | 18.68 (0.009) | 18.67 | 18.67 (0.02) | ||||||||||
| i magnitude | 18.39 (0.01) | 18.39 (0.01) | 18.37 | 18.39 (0.01) | 18.39 (0.01) | 18.40 | 18.38 (0.02) | ||||||||||
| z magnitude | 18.27 (0.02) | 18.27 (0.02) | 18.22 | 18.27 (0.02) | 18.27 (0.02) | 18.30 | 18.27 (0.03) | ||||||||||
| G magnitude | 18.81 (0.03) | 18.85 | 18.81 | 18.81 (0.003) | 18.85 | ||||||||||||
| BP magnitude | 19.44 (0.03) | 19.42 | 19.42 | ||||||||||||||
| RP magnitude | 18.08 (0.02) | 18.07 | 18.07 | ||||||||||||||
| Pan g magnitude | 19.90 (0.02) | 19.93 (0.02) | 19.90 (0.02) | ||||||||||||||
| Pan r magnitude | 18.69 (0.01) | 18.67 (0.008) | 18.69 (0.01) | ||||||||||||||
| Pan i magnitude | 18.41 (0.007) | 18.41 (0.006) | 18.41 (0.007) | ||||||||||||||
| Pan z magnitude | 18.35 (0.004) | 18.35 (0.01) | 18.35 (0.004) | ||||||||||||||
| Pan y magnitude | 18.31 (0.007) | 18.32 (0.01) | 18.31 (0.007) | ||||||||||||||
| E(B-V) | 0.001 | ||||||||||||||||
* 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.