All names: USNO-B1.0 0987-00020787, WDJ021204.85+084650.89, Feige 20, WD 0209+085, Gaia DR3 2521867808229983744, GALEX J021204.7+084649, PB 6735, uvby98 620001020, Gaia DR2 2521867808229983744, WD0209+085, TIC 337075714, 2MASS J02120485+0846508, CSI+08-02094, GSC 00630-00220, Gaia EDR3 2521867808229983744, HS 0209+0832
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Koester et al. 2005 | Koester et al. 2001 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 12 04.94 (0.05) | 02 12 04.94 (0.08) | 02 12 04.90 | 02 12 04.94 | 02 12 04.85 (0.05) | 02 12 04.94 | 02 12 04.25 | |||||
| Declination | 08 46 50.48 (0.04) | 08 46 50.49 (0.06) | 08 46 50.00 | 08 46 50.48 | 08 46 50.89 (0.04) | 08 46 50.49 | 08 46 51.60 | |||||
| Spectral type | DA | DA | DAB | DA | DA1.4 | DAB | ||||||
| Effective temperature | [K] | 36550.0 (539) | 37300.0 | 38443.0 (152) | ||||||||
| log(g) | [cgs] | 8.00 (0.04) | 8.00 | 7.74 (0.02) | ||||||||
| Mass | [M☉] | 0.67 (0.02) | 0.55 | |||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| 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] | 12.10 (0.06) | 11.94 (0.09) | 12.10 | 12.10 (0.06) | 11.94 (0.09) | ||||||
| Distance | [pc] | 82.65 (0.4) | 83.78 (0.6) | 73.00 | 82.65 | 82.65 (0.4) | 83.78 (0.6) | |||||
| Composition | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 80.07431055 (0.06) | 80.00318588 (0.2) | 80.074 (0.06) | 80.00318588 | |||||||
| Proper motion (declination) | [mas/yr] | -25.77393916 (0.04) | -25.87793983 (0.1) | -25.774 (0.04) | -25.87793983 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 13.90 | 13.70 | ||||||||||
| V magnitude | 13.84 | |||||||||||
| R magnitude | 14.20 | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | 14.79 (0.04) | |||||||||||
| H magnitude | 14.99 (0.07) | |||||||||||
| K magnitude | 15.24 (0.2) | |||||||||||
| u magnitude | ||||||||||||
| g magnitude | ||||||||||||
| r magnitude | ||||||||||||
| i magnitude | ||||||||||||
| z magnitude | ||||||||||||
| G magnitude | 13.98 (0.002) | 13.99 | 13.98 | 13.98 (0.003) | 13.99 | |||||||
| BP magnitude | 13.82 (0.002) | 13.79 | 13.79 | |||||||||
| RP magnitude | 14.30 (0.001) | 14.29 | 14.29 | |||||||||
| Pan g magnitude | 13.80 (0.007) | |||||||||||
| Pan r magnitude | 14.25 (0.002) | |||||||||||
| Pan i magnitude | 14.63 (0.004) | |||||||||||
| Pan z magnitude | 14.93 (0.002) | |||||||||||
| Pan y magnitude | 15.13 (0.003) | |||||||||||
| E(B-V) | 0.008 | |||||||||||
* 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.