All names: SDSS J121211.04+545222.6, Gaia DR2 1573476112296657408, WD 1209+551, Gaia EDR3 1573476112296657408, J1212+5452, GALEX J121211.1+545221, SBSS 1209+551, SDSS J121211.13+545221.1, WDJ121211.02+545222.88, SDSS J121211.02+545222.5, SDSS J121211.03+545222.6, Gaia DR3 1573476112296657408
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | Coutu et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 12 11.15 (0.06) | 12 12 11.03 | 12 12 11.02 | 12 12 11.15 (0.09) | 12 12 11.15 | 12 12 11.02 (0.06) | 12 12 11.15 | 12 12 11.03 | 12 12 11.21 | 12 12 11.04 | |||||||
| Declination | 54 52 20.72 (0.06) | 54 52 22.55 | 54 52 22.88 | 54 52 20.79 (0.08) | 54 52 20.72 | 54 52 22.88 (0.06) | 54 52 20.79 | 54 52 22.61 | 54 52 19.20 | 54 52 22.65 | |||||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | DQ: | DQ: | DQ | DQ | ||||||||
| Effective temperature | [K] | 8138.0 (48) | 8186.0 (195) | 9039.0 | 8791.0 | 7860.0 (95) | 10120.0 (55) | 10133.0 (65) | |||||||||
| log(g) | [cgs] | 7.95 (0.01) | 7.95 | 8.28 | 8.20 | 7.88 (0.02) | 8.50 (0.4) | 8.68 (0.5) | |||||||||
| Mass | [M☉] | 0.546 (0.01) | 0.5465 | 0.775 | 0.701 | 0.509 (0.02) | |||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||||
| Cooling age | [Gyr] | 1.0400 | 0.9820 | 1.1860 | 1.1660 | ||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | -5.36 | -5.2885 (0.04) | |||||||||||||||
| 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] | 10.57 (0.09) | 10.58 (0.1) | 10.58 | 10.58 (0.1) | 10.57 | 10.57 (0.09) | 10.58 (0.1) | |||||||||
| Distance | [pc] | 94.61 (0.8) | 94.52 (1) | 94.51 (1) | 94.51 (1) | 94.61 | 94.61 (0.8) | 94.51 (1) | |||||||||
| Composition | He | He | |||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 73.19392014 (0.08) | 73.00710166 (0.2) | 73.194 (0.08) | 73.007 | 76.1 | |||||||||||
| Proper motion (declination) | [mas/yr] | -134.5659031 (0.09) | -134.7039281 (0.2) | -134.566 (0.09) | -134.704 | -132.5 | |||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 18.00 | ||||||||||||||||
| V magnitude | |||||||||||||||||
| R magnitude | |||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 17.59 (0.04) | ||||||||||||||||
| H magnitude | |||||||||||||||||
| K magnitude | |||||||||||||||||
| u magnitude | 18.10 (0.01) | 18.09 (0.01) | 18.10 (0.01) | 18.11 (0.01) | 18.05 (0.04) | 18.05 | 18.09 (0.04) | ||||||||||
| g magnitude | 17.86 (0.006) | 17.86 (0.006) | 17.86 (0.006) | 17.78 (0.05) | 17.78 | 17.80 (0.05) | |||||||||||
| r magnitude | 17.83 (0.006) | 17.83 (0.006) | 17.86 (0.006) | 17.86 (0.03) | 17.85 | 17.87 (0.03) | |||||||||||
| i magnitude | 17.98 (0.008) | 17.98 (0.008) | 17.97 (0.008) | 17.96 (0.02) | 17.96 | 17.97 (0.02) | |||||||||||
| z magnitude | 18.10 (0.02) | 18.10 (0.02) | 18.15 (0.03) | 18.12 (0.03) | 18.12 | 18.15 (0.03) | |||||||||||
| G magnitude | 17.81 (0.009) | 17.84 | 17.81 | 17.81 (0.003) | 17.84 | ||||||||||||
| BP magnitude | 17.90 (0.009) | 17.88 | 17.88 | ||||||||||||||
| RP magnitude | 17.65 (0.01) | 17.64 | 17.64 | ||||||||||||||
| Pan g magnitude | 17.88 (0.006) | 17.88 (0.006) | |||||||||||||||
| Pan r magnitude | 17.88 (0.006) | 17.88 (0.005) | |||||||||||||||
| Pan i magnitude | 17.97 (0.003) | 17.97 (0.003) | |||||||||||||||
| Pan z magnitude | 18.13 (0.006) | 18.13 (0.006) | |||||||||||||||
| Pan y magnitude | 18.19 (0.02) | 18.19 (0.01) | |||||||||||||||
| E(B-V) | 0.007 | ||||||||||||||||
* 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.