All names: EGGR 301, Gaia DR2 2191146977029443584, Gaia EDR3 2191146977029443584, PSO J320.1756+58.3225, J2120+5819, WD 2119+581, WD 2119+58, 21207+5819, Gaia DR3 2191146977029443584, WDJ212042.15+581923.35, PM J21207+5819, Lan 430, GD 548
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Blouin et al. 2019 | Gaia DR2 | Stilism | Limoges et al. 2015 | Gianninas et al. 2011 | Zuckerman et al. 2003 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 20 42.17 (0.03) | 21 20 42.17 (0.03) | 21 20 42.17 (0.03) | 21 20 42.17 | 21 20 42.15 (0.03) | 21 20 42.17 | 21 20 42.48 | |||||||||
| Declination | 58 19 21.13 (0.03) | 58 19 21.20 (0.04) | 58 19 21.20 (0.04) | 58 19 21.13 | 58 19 23.35 (0.03) | 58 19 21.20 | 58 19 29.64 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | DA6.2 | DA6 | |||||||
| Effective temperature | [K] | 8159.0 (74) | 7921.0 (58) | 7979.8 (37) | 7820.0 (95) | 8090.0 (119) | 8190.0 (120) | 20500.0 | 8083.0 (40) | |||||||
| log(g) | [cgs] | 8.03 (0.02) | 7.98 (0.01) | 7.99 (0.01) | 7.96 (0.03) | 8.03 (0.06) | 8.14 (0.07) | 8.00 | 8.02 (0.008) | |||||||
| Mass | [M☉] | 0.614 (0.01) | 0.584 (0.01) | 0.571 (0.02) | 0.61 (0.04) | 0.68 (0.04) | 0.609 (0.007) | |||||||||
| log(Luminosity) | [L☉] | -3.22 | ||||||||||||||
| Cooling age | [Gyr] | 1.1100 | 1.0810 (0.06) | |||||||||||||
| log(H/He) | ||||||||||||||||
| log(C/He) | ||||||||||||||||
| log(Ca/He) | ||||||||||||||||
| log(Ca/H) | <-6.870 | |||||||||||||||
| log(C/H) | ||||||||||||||||
| log(N/H) | ||||||||||||||||
| log(O/H) | ||||||||||||||||
| log(Na/H) | ||||||||||||||||
| log(Mg/H) | ||||||||||||||||
| log(Al/H) | ||||||||||||||||
| log(Si/H) | ||||||||||||||||
| log(P/H) | ||||||||||||||||
| log(S/H) | ||||||||||||||||
| log(Sc/H) | ||||||||||||||||
| log(Ti/H) | ||||||||||||||||
| log(Cr/H) | ||||||||||||||||
| log(Mn/H) | ||||||||||||||||
| log(Fe/H) | ||||||||||||||||
| log(Ni/H) | ||||||||||||||||
| Parallax | [mas] | 25.80 (0.03) | 25.80 (0.03) | 25.76 (0.04) | 25.76 (0.04) | 25.76 (0.04) | 25.76 (0.04) | 25.80 | 25.80 (0.03) | 25.76 (0.04) | ||||||
| Distance | [pc] | 38.76 (0.04) | 38.76 (0.05) | 38.82 (0.06) | 38.83 (0.06) | 38.83 (0.06) | 38.83 (0.06) | 39.50 (2) | 36.00 | 38.76 | 38.76 (0.04) | 38.83 (0.06) | ||||
| Composition | H | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 6.242273246 (0.04) | 6.067064997 (0.08) | 6.242 (0.04) | 6.067064997 | |||||||||||
| Proper motion (declination) | [mas/yr] | -138.2927967 (0.04) | -138.2509576 (0.08) | -138.293 (0.04) | -138.2509576 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | 17.00 | |||||||||||||||
| V magnitude | 16.00 | |||||||||||||||
| R magnitude | ||||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 15.44 (0.01) | 15.39 (0.06) | ||||||||||||||
| H magnitude | 15.26 (0.1) | |||||||||||||||
| K magnitude | ||||||||||||||||
| u magnitude | ||||||||||||||||
| g magnitude | 16.02 (0.009) | |||||||||||||||
| r magnitude | 15.95 (0.003) | |||||||||||||||
| i magnitude | 15.97 (0.004) | |||||||||||||||
| z magnitude | 16.07 (0.008) | |||||||||||||||
| G magnitude | 15.89 (0.002) | 15.89 | 15.89 | 15.89 | 15.89 (0.003) | 15.89 | ||||||||||
| BP magnitude | 16.00 (0.002) | 16.00 | 16.00 | |||||||||||||
| RP magnitude | 15.65 (0.002) | 15.65 | 15.65 | |||||||||||||
| Pan g magnitude | 16.02 (0.009) | 16.02 (0.009) | 16.02 (0.009) | |||||||||||||
| Pan r magnitude | 15.95 (0.004) | 15.95 (0.003) | 15.95 (0.003) | |||||||||||||
| Pan i magnitude | 15.97 (0.004) | 15.97 (0.004) | 15.97 (0.004) | |||||||||||||
| Pan z magnitude | 16.07 (0.007) | 16.07 (0.008) | 16.07 (0.008) | |||||||||||||
| Pan y magnitude | 16.12 (0.007) | 16.12 (0.009) | 16.12 (0.009) | |||||||||||||
| E(B-V) | 0.003 | |||||||||||||||
* 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.