All names: WD 0257-210, USNO-B1.0 0691-00031592, 2MASS J02595267-2052501, Gaia DR2 5079634765595460736, TIC 71344531, Gaia DR3 5079634765595460736, HE 0257-2104, Gaia EDR3 5079634765595460736, GALEX J025952.6-205250, EC 02576-2104, UCAC3 139-7250
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Koester et al. 2009 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 59 52.59 (0.05) | 02 59 52.59 (0.08) | 02 59 52.59 | 02 59 52.67 (0.05) | 02 59 52.73 | |||
| Declination | -20 52 51.11 (0.05) | -20 52 51.08 (0.08) | -20 52 51.11 | -20 52 50.16 (0.05) | -20 52 43.32 | |||
| Spectral type | DA | DA | DA | |||||
| Effective temperature | [K] | 17362.0 (42) | 17907.0 (366) | |||||
| log(g) | [cgs] | 7.69 (0.008) | 7.88 (0.02) | |||||
| Mass | [M☉] | 0.554 (0.01) | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | 8.08 (0.06) | 8.23 (0.1) | 8.08 | 8.08 (0.06) | |||
| Distance | [pc] | 123.70 (0.9) | 121.50 (1) | 123.70 | 123.70 (0.9) | |||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -68.79578793 (0.07) | -68.52771756 (0.2) | -68.796 (0.07) | ||||
| Proper motion (declination) | [mas/yr] | -59.60277965 (0.06) | -59.89234186 (0.2) | -59.603 (0.06) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 16.30 | 16.40 | ||||||
| V magnitude | ||||||||
| R magnitude | 15.90 | |||||||
| I magnitude | ||||||||
| J magnitude | 16.72 (0.2) | |||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | ||||||||
| g magnitude | ||||||||
| r magnitude | ||||||||
| i magnitude | ||||||||
| z magnitude | ||||||||
| G magnitude | 16.29 (0.003) | 16.32 | 16.29 | 16.29 (0.003) | ||||
| BP magnitude | 16.24 (0.003) | 16.20 | ||||||
| RP magnitude | 16.43 (0.007) | 16.43 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| 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.