All names: EGGR 333, SDSS J201222.28+311349.5, WD 2010+310, Gaia DR3 2053953008490747392, GEN# +6.10060229, USNO 562, WDJ201222.27+311348.88, KPD 2010+3104, 20123+3113, 2MASS J20122227+3113485, SDSS J201222.28+311349.4, TIC 92633917, GD 229, Gaia EDR3 2053953008490747392, Gaia DR2 2053953008490747392, PM J20123+3113, uvby98 610060229, PLX 4802.01, J2012+3113
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Jewett et al. 2024 | O'Brien et al. 2024 | McCleery et al. 2020 | Gaia DR2 | Stilism | Ferrario et al. 2015 | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 12 22.31 (0.02) | 20 12 22.31 (0.02) | 20 12 22.31 (0.02) | 20 12 22.31 | 20 12 22.27 (0.02) | 20 12 22.31 | 20 12 22.85 | ||||||||
| Declination | 31 13 50.36 (0.02) | 31 13 50.31 (0.03) | 31 13 50.31 (0.03) | 31 13 50.36 | 31 13 48.88 (0.02) | 31 13 50.31 | 31 13 39.72 | ||||||||
| Spectral type | DBH | DBP | DBP | DBP | DB | DBP | DB: | DXP2 | DXH2 | ||||||
| Effective temperature | [K] | 23226.0 (505) | 23225.0 (507) | 18365.0 (599) | 17663.2 (306) | 18000.0 | 15900.0 (2465) | 19160.0 (306) | |||||||
| log(g) | [cgs] | 9.08 (0.01) | 9.08 | 8.88 (0.03) | 8.85 (0.02) | 8.77 (0.09) | 8.93 (0.01) | ||||||||
| Mass | [M☉] | 1.223 (0.005) | 1.223 (0.005) | 1.135 (0.02) | >1 | 1.07 (0.05) | 1.158 (0.008) | ||||||||
| log(Luminosity) | [L☉] | -2.54 | |||||||||||||
| Cooling age | [Gyr] | 0.4000 (0.03) | |||||||||||||
| log(H/He) | -6.0 | -5.0 | |||||||||||||
| 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] | 32.51 (0.02) | 32.51 (0.02) | 32.50 (0.03) | 32.50 (0.03) | 34.70 (3) | 32.51 | 32.51 (0.02) | 32.50 (0.03) | 34.80 (27) | |||||
| Distance | [pc] | 30.76 (0.02) | 30.76 (0.02) | 30.77 (0.03) | 30.77 (0.03) | 28.80 (3) | 30.76 | 30.76 (0.02) | 30.77 (0.03) | 28.74 (22) | |||||
| Composition | He | He | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 33.98142586 (0.02) | 33.90375172 (0.05) | 33.981 (0.02) | 33.90375172 | ||||||||||
| Proper motion (declination) | [mas/yr] | 92.21717028 (0.02) | 92.21151441 (0.06) | 92.217 (0.03) | 92.21151441 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | yes | yes | |||||||||||||
| Bd | [MG] | 520 | |||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | 14.77 | ||||||||||||||
| V magnitude | 14.85 | ||||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 15.18 (0.04) | ||||||||||||||
| H magnitude | 15.16 (0.08) | ||||||||||||||
| K magnitude | 14.95 (0.1) | ||||||||||||||
| u magnitude | 14.26 (0.003) | 14.26 (0.003) | |||||||||||||
| g magnitude | 14.62 (0.003) | 14.62 (0.003) | |||||||||||||
| r magnitude | 14.86 (0.003) | 14.86 (0.003) | |||||||||||||
| i magnitude | 15.23 (0.004) | 15.23 (0.004) | |||||||||||||
| z magnitude | 15.52 (0.005) | 15.52 (0.005) | |||||||||||||
| G magnitude | 14.77 (0.001) | 14.79 | 14.79 | 14.77 | 14.77 (0.003) | 14.79 | |||||||||
| BP magnitude | 14.70 (0.001) | 14.66 | 14.66 | ||||||||||||
| RP magnitude | 14.92 (0.001) | 14.91 | 14.91 | ||||||||||||
| Pan g magnitude | 14.74 (0.008) | ||||||||||||||
| Pan r magnitude | 14.91 (0.0004) | ||||||||||||||
| Pan i magnitude | 15.28 (0.001) | ||||||||||||||
| Pan z magnitude | 15.60 (0.01) | ||||||||||||||
| Pan y magnitude | 15.60 (0.005) | ||||||||||||||
| 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.