All names: GD 229, Gaia DR2 2053953008490747392, 20123+3113, SDSS J201222.28+311349.5, Gaia EDR3 2053953008490747392, WD 2010+310, WDJ201222.27+311348.88, uvby98 610060229, TIC 92633917, PM J20123+3113, SDSS J201222.28+311349.4, GEN# +6.10060229, USNO 562, Gaia DR3 2053953008490747392, J2012+3113, KPD 2010+3104, EGGR 333, PLX 4802.01, 2MASS J20122227+3113485
| 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.