All names: TIC 258825809, Gaia DR2 291508020559104, SDSS J025747.80+004902.2, WD 0255+006.1, [SGR2010] J0257+0049, Gaia EDR3 291508020559104, WIRED J025747.80+004902.2, 2MASS J02574779+0049021, Gaia DR3 291508020559104, SDSS J025747.80+004902.3, SDSS J025747.83+004902.1, GALEX J025747.8+004902
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 57 47.82 (0.2) | 02 57 47.82 | 02 57 47.82 (0.3) | 02 57 47.80 | 02 57 47.80 (0.2) | 02 57 47.80 | 02 57 47.33 | 02 57 47.80 | |||
| Declination | 00 49 02.21 (0.2) | 00 49 02.20 | 00 49 02.21 (0.3) | 00 49 02.21 | 00 49 02.25 (0.2) | 00 49 02.30 | 00 48 59.40 | 00 49 02.27 | |||
| Spectral type | DA+M | DA+M4 | DA:+M | DA: | DA+M | ||||||
| Effective temperature | [K] | 22811.0 (5781) | 6300.0 (1) | 6300.0 (3) | |||||||
| log(g) | [cgs] | 7.79 (1) | 8.63 (0.2) | 10.00 (0.003) | |||||||
| Mass | [M☉] | 0.61 (0.5) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.35 (0.3) | 1.75 (0.5) | 2.35 (0.3) | |||||||
| Distance | [pc] | 425.25 (54) | 572.48 (149) | 712.00 (126) | 425.24 (54) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 20.82584585 (0.3) | 19.607 (0.6) | 20.826 (0.3) | 25.1 | ||||||
| Proper motion (declination) | [mas/yr] | -2.751368207 (0.2) | -2.449 (0.6) | -2.751 (0.2) | 1.7 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.80 (0.005) | ||||||||||
| H magnitude | 15.26 (0.007) | ||||||||||
| K magnitude | 14.93 (0.008) | ||||||||||
| u magnitude | 21.12 (0.09) | 21.05 | 21.03 (0.09) | 21.05 (0.09) | 21.05 | 21.03 (0.09) | |||||
| g magnitude | 20.24 (0.02) | 20.27 | 20.27 (0.02) | 20.27 (0.03) | 20.27 | 20.27 (0.03) | |||||
| r magnitude | 19.49 (0.01) | 19.46 | 19.45 (0.02) | 19.46 (0.02) | 19.46 | 19.44 (0.02) | |||||
| i magnitude | 18.20 (0.009) | 18.16 | 18.14 (0.009) | 18.16 (0.02) | 18.16 | 18.16 (0.02) | |||||
| z magnitude | 17.38 (0.01) | 17.34 | 17.34 (0.01) | 17.34 (0.02) | 17.34 | 17.33 (0.02) | |||||
| G magnitude | 18.82 (0.07) | 18.84 | 18.82 (0.005) | ||||||||
| BP magnitude | 19.90 (0.07) | 19.89 | |||||||||
| RP magnitude | 17.68 (0.02) | 17.67 | |||||||||
| Pan g magnitude | 20.15 (0.02) | ||||||||||
| Pan r magnitude | 19.44 (0.04) | ||||||||||
| Pan i magnitude | 18.19 (0.004) | ||||||||||
| Pan z magnitude | 17.49 (0.003) | ||||||||||
| Pan y magnitude | 17.12 (0.007) | ||||||||||
| E(B-V) | 0.044 | ||||||||||
* 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.