All names: USNO-B1.0 1022-00025184, NLTT 6751, Gaia DR2 2574620550768898432, WDJ020110.7+121226.03, GALEX J020110.5+121225, Gaia DR3 2574620550768898432, Gaia EDR3 2574620550768898432, WDJ020110.70+121226.03, LSPM J0201+1212, 2MASS J02011073+1212263, J0201+1212, GD 21, LP 469-55, TIC 404736570
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 01 10.51 (0.04) | 02 01 10.51 (0.07) | 02 01 10.51 | 02 01 10.51 | 02 01 10.70 (0.04) | 02 01 10.51 | |||||||
| Declination | 12 12 24.60 (0.04) | 12 12 24.65 (0.05) | 12 12 24.65 | 12 12 24.60 | 12 12 26.03 (0.04) | 12 12 24.65 | |||||||
| Spectral type | DC | DC | DC | DC: | DC | ||||||||
| Effective temperature | [K] | 6952.0 (73) | 6948.0 (19) | 6911.4 (42) | 7456.0 | 7177.0 | 6877.0 (53) | ||||||
| log(g) | [cgs] | 8.03 (0.04) | 8.02 (0.005) | 8.02 (0.02) | 8.26 | 8.16 | 8.04 (0.01) | ||||||
| Mass | [M☉] | 0.59 (0.02) | 0.589 (0.005) | 0.759 | 0.676 | 0.595 (0.01) | |||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 1.7200 | 2.0990 | 1.9440 | |||||||||
| log(H/He) | -3.4 | ||||||||||||
| 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] | 31.75 (0.05) | 31.75 (0.05) | 31.68 (0.08) | 31.68 (0.08) | 31.68 (0.08) | 31.75 | 31.75 (0.05) | 31.68 (0.08) | ||||
| Distance | [pc] | 31.50 (0.05) | 31.50 (0.05) | 31.57 (0.08) | 31.56 (0.08) | 31.56 (0.08) | 31.50 | 31.50 (0.05) | 31.56 (0.08) | ||||
| Composition | He | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -174.4810077 (0.06) | -174.3851779 (0.1) | -174.481 (0.06) | -174.3851779 | ||||||||
| Proper motion (declination) | [mas/yr] | -89.63228143 (0.05) | -89.39752579 (0.1) | -89.632 (0.05) | -89.39752579 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 16.50 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 15.90 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 15.57 (0.01) | 15.75 (0.08) | |||||||||||
| H magnitude | 15.48 (0.01) | 15.44 (0.1) | |||||||||||
| K magnitude | 15.43 (0.02) | 15.38 (0.2) | |||||||||||
| u magnitude | 16.72 (0.008) | 16.73 (0.008) | |||||||||||
| g magnitude | 16.23 (0.004) | ||||||||||||
| r magnitude | 16.09 (0.004) | ||||||||||||
| i magnitude | 16.09 (0.004) | ||||||||||||
| z magnitude | 16.14 (0.008) | ||||||||||||
| G magnitude | 16.07 (0.005) | 16.09 | 16.09 | 16.07 | 16.07 (0.003) | 16.09 | |||||||
| BP magnitude | 16.23 (0.005) | 16.23 | 16.23 | ||||||||||
| RP magnitude | 15.77 (0.005) | 15.78 | 15.78 | ||||||||||
| Pan g magnitude | 16.24 (0.002) | 16.24 (0.003) | |||||||||||
| Pan r magnitude | 16.09 (0.004) | 16.09 (0.004) | |||||||||||
| Pan i magnitude | 16.13 (0.003) | 16.13 (0.003) | |||||||||||
| Pan z magnitude | 16.18 (0.002) | 16.18 (0.002) | |||||||||||
| Pan y magnitude | 16.24 (0.01) | 16.24 (0.01) | |||||||||||
| E(B-V) | 0.000 | ||||||||||||
* 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.