All names: J1225+4706, SDSS J122545.87+470613.0, PSO J186.4406+47.1036, Gaia EDR3 1542337839923130624, Gaia DR3 1542337839923130624, Gaia DR2 1542337839923130624, GALEX J122545.8+470612, WD 1223+473, USNO-B1.0 1371-00270478, SDSS J122545.88+470613.0, LSPM J1225+4706
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Blouin & Dufour 2019 | Coutu et al. 2019 | Gaia DR2 | Stilism | Koester et al. 2006 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 25 45.68 (0.1) | 12 25 45.88 | 12 25 45.94 | 12 25 45.69 (0.2) | 12 25 45.68 | 12 25 45.94 (0.1) | 12 25 46.03 | 12 25 45.88 | ||||||
| Declination | 47 06 13.28 (0.1) | 47 06 13.05 | 47 06 13.06 | 47 06 13.27 (0.2) | 47 06 13.28 | 47 06 13.06 (0.1) | 47 06 05.76 | 47 06 13.00 | ||||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | DQ8.3 | DQ | DQ | ||||||
| Effective temperature | [K] | 6294.0 (67) | 6292.0 (79) | 6109.0 | 6492.0 (45) | 6348.0 (34) | ||||||||
| log(g) | [cgs] | 7.92 (0.06) | 7.92 | 8.00 (0) | 8.02 (0.03) | 10.00 (0.009) | ||||||||
| Mass | [M☉] | 0.528 (0.03) | 0.5283 | 0.584 (0.03) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 1.8700 | ||||||||||||
| log(H/He) | ||||||||||||||
| log(C/He) | -5.329 (0.07) | -5.3502 (0.05) | -5.82 (0.01) | |||||||||||
| 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] | 9.16 (0.2) | 8.88 (0.3) | 8.88 | 8.88 (0.3) | 9.16 | 9.16 (0.2) | |||||||
| Distance | [pc] | 109.12 (3) | 112.62 (4) | 112.62 (4) | 112.62 (4) | 109.12 | 109.12 (3) | |||||||
| Composition | He | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -167.0372215 (0.1) | -166.9367812 (0.2) | -167.037 (0.1) | ||||||||||
| Proper motion (declination) | [mas/yr] | 13.51105233 (0.2) | 13.57844761 (0.4) | 13.511 (0.2) | ||||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | 20.00 | |||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | 19.10 | |||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 19.77 (0.03) | 19.77 (0.04) | 19.77 (0.04) | 19.78 (0.04) | ||||||||||
| g magnitude | 19.58 (0.01) | 19.58 (0.01) | 19.58 (0.01) | 19.59 (0.04) | ||||||||||
| r magnitude | 19.08 (0.01) | 19.08 (0.01) | 19.08 (0.01) | 19.07 (0.03) | ||||||||||
| i magnitude | 18.89 (0.01) | 18.89 (0.01) | 18.89 (0.01) | 18.91 (0.02) | ||||||||||
| z magnitude | 18.96 (0.04) | 18.96 (0.04) | 18.96 (0.04) | 18.94 (0.05) | ||||||||||
| G magnitude | 19.11 (0.02) | 19.15 | 19.11 | 19.11 (0.003) | ||||||||||
| BP magnitude | 19.44 (0.02) | 19.34 | ||||||||||||
| RP magnitude | 18.58 (0.02) | 18.58 | ||||||||||||
| Pan g magnitude | 19.60 (0.008) | 19.60 (0.008) | ||||||||||||
| Pan r magnitude | 19.08 (0.006) | 19.08 (0.006) | ||||||||||||
| Pan i magnitude | 18.89 (0.01) | 18.89 (0.01) | ||||||||||||
| Pan z magnitude | 19.01 (0.02) | 19.01 (0.02) | ||||||||||||
| Pan y magnitude | 19.02 (0.03) | 19.02 (0.03) | ||||||||||||
| E(B-V) | 0.006 | |||||||||||||
* 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.