All names: WD 1248+443, USNO-B1.0 1340-00239545, Gaia EDR3 1528861748669458432, WDJ125106.16+440303.04, Gaia DR2 1528861748669458432, SDSS J125106.12+440303.1, SDSS J125106.11+440303.0, SDSS J125106.11+440303.1, Gaia DR3 1528861748669458432, J1251+4403, EQ J1251+4403
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Bergeron et al. 2022 | Gaia DR2 | Stilism | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 51 05.95 (0.4) | 12 51 06.12 | 12 51 05.95 (0.4) | 12 51 06.16 (0.4) | 12 51 05.95 | 12 51 05.71 | |||||||
| Declination | 44 03 03.01 (0.4) | 44 03 03.09 | 44 03 03.01 (0.5) | 44 03 03.09 (0.4) | 44 03 03.01 | 44 02 59.64 | |||||||
| Spectral type | DC-IRfaint | DC | DC | DC | DC | DC | |||||||
| Effective temperature | [K] | 4746.0 (42) | 4787.0 (42) | 4746.0 (42) | |||||||||
| log(g) | [cgs] | 9.24 (0.03) | 9.28 (0.04) | ||||||||||
| Mass | [M☉] | 1.276 (0.009) | 1.289 (0.01) | 1.276 (0.009) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 4.1000 | 3.6100 | ||||||||||
| log(H/He) | -3.5 | -3.48 | -3.5 | ||||||||||
| log(C/He) | |||||||||||||
| 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] | 20.58 (0.6) | 21.14 (0.8) | 21.14 (0.8) | 20.58 (0.6) | 21.14 (0.8) | |||||||
| Distance | [pc] | 48.58 (1) | 47.30 (2) | 47.30 (2) | 48.58 (1) | 47.30 (2) | |||||||
| Composition | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -144.5376216 (0.4) | -142.8652437 (0.8) | -144.538 (0.4) | -142.8652437 | ||||||||
| Proper motion (declination) | [mas/yr] | -4.829005875 (0.6) | -2.17178012 (2) | -4.829 (0.6) | -2.17178012 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 20.50 | ||||||||||||
| V magnitude | 20.18 (0.03) | ||||||||||||
| R magnitude | 20.30 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 21.78 (0.08) | 21.78 (0.08) | |||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 21.46 (0.1) | 21.44 (0.1) | 21.45 (0.1) | 21.43 | |||||||||
| g magnitude | 20.15 (0.02) | 20.16 (0.02) | 20.16 (0.02) | 20.18 | |||||||||
| r magnitude | 20.38 (0.03) | 20.38 (0.03) | 20.38 (0.03) | 20.39 | |||||||||
| i magnitude | 20.69 (0.04) | 20.67 (0.04) | 20.70 (0.04) | 20.69 | |||||||||
| z magnitude | 20.86 (0.2) | 20.84 (0.2) | 20.87 (0.2) | 20.90 | |||||||||
| G magnitude | 20.32 (0.07) | 20.40 | 20.32 (0.006) | 20.40 | |||||||||
| BP magnitude | 20.28 (0.07) | 20.31 | 20.31 | ||||||||||
| RP magnitude | 20.33 (0.09) | 20.22 | 20.22 | ||||||||||
| Pan g magnitude | 20.14 (0.02) | 20.14 (0.02) | |||||||||||
| Pan r magnitude | 20.37 (0.02) | 20.37 (0.03) | |||||||||||
| Pan i magnitude | 20.80 (0.02) | 20.80 (0.02) | |||||||||||
| Pan z magnitude | 20.96 (0.07) | 20.96 (0.05) | |||||||||||
| Pan y magnitude | 20.93 (0.2) | 20.93 (0.2) | |||||||||||
| 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.