All names: [HHD2009] SDSS J1257+4755, SDSS J125736.91+475521.8, WD 1255+481, Gaia DR3 1554999648323842560, Gaia DR2 1554999648323842560, SDSS J125736.91+475521.7, Gaia EDR3 1554999648323842560, WIRED J125736.91+475521.7, GALEX J125736.9+475522
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Tremblay et al. 2011 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 57 36.89 (0.1) | 12 57 36.92 | 12 57 36.90 (0.1) | 12 57 36.91 | 12 57 36.92 (0.1) | 12 57 36.91 | 12 57 36.62 | 12 57 36.91 | |||||
| Declination | 47 55 21.77 (0.1) | 47 55 21.83 | 47 55 21.77 (0.2) | 47 55 21.68 | 47 55 21.73 (0.1) | 47 55 21.77 | 47 55 18.12 | 47 55 21.77 | |||||
| Spectral type | DA+M | DA | DA+M | DA+M | DA d | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 16149.0 (394) | 16580.0 (340) | 10236.0 (62) | 10244.0 (67) | ||||||||
| log(g) | [cgs] | 7.66 (0.1) | 7.65 (0.07) | 7.91 (0.07) | 7.94 (0.07) | ||||||||
| Mass | [M☉] | 0.44 (0.04) | 0.45 (0.02) | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.1549 | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | |||||||||||||
| log(C/H) | |||||||||||||
| log(N/H) | |||||||||||||
| log(O/H) | |||||||||||||
| log(Na/H) | |||||||||||||
| log(Mg/H) | |||||||||||||
| log(Al/H) | |||||||||||||
| log(Si/H) | |||||||||||||
| log(P/H) | |||||||||||||
| log(S/H) | |||||||||||||
| log(Sc/H) | |||||||||||||
| log(Ti/H) | |||||||||||||
| log(Cr/H) | |||||||||||||
| log(Mn/H) | |||||||||||||
| log(Fe/H) | |||||||||||||
| log(Ni/H) | |||||||||||||
| Parallax | [mas] | 1.78 (0.2) | 1.70 (0.2) | 1.78 (0.2) | |||||||||
| Distance | [pc] | 562.88 (59) | 588.96 (83) | 438.00 (35) | 562.87 (59) | ||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -18.05751169 (0.1) | -18.31447823 (0.3) | -18.058 (0.1) | -16.9 | ||||||||
| Proper motion (declination) | [mas/yr] | 2.279705664 (0.2) | 2.306838183 (0.3) | 2.28 (0.2) | -1.8 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | WDMS | WDMS | WDMS | WDMS | |||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 19.07 (0.02) | 19.07 | 19.07 (0.02) | 19.07 (0.03) | 19.07 | 19.07 (0.03) | |||||||
| g magnitude | 18.73 (0.008) | 18.74 | 18.73 (0.008) | 18.74 (0.02) | 18.74 | 18.74 (0.02) | |||||||
| r magnitude | 18.92 (0.01) | 18.90 | 18.92 (0.01) | 18.90 (0.02) | 18.90 | 18.91 (0.02) | |||||||
| i magnitude | 18.84 (0.01) | 18.83 | 18.84 (0.01) | 18.83 (0.02) | 18.83 | 18.83 (0.02) | |||||||
| z magnitude | 18.44 (0.02) | 18.46 | 18.44 (0.02) | 18.46 (0.03) | 18.46 | 18.43 (0.03) | |||||||
| G magnitude | 18.74 (0.02) | 18.76 | 18.74 (0.003) | ||||||||||
| BP magnitude | 18.84 (0.02) | 18.83 | |||||||||||
| RP magnitude | 18.45 (0.02) | 18.43 | |||||||||||
| Pan g magnitude | 18.77 (0.008) | ||||||||||||
| Pan r magnitude | 18.98 (0.01) | ||||||||||||
| Pan i magnitude | 18.88 (0.007) | ||||||||||||
| Pan z magnitude | 18.57 (0.007) | ||||||||||||
| Pan y magnitude | 18.31 (0.01) | ||||||||||||
| E(B-V) | 0.018 | ||||||||||||
* 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.