All names: SDSS J025459.59-002722.2, GALEX J025459.6-002722, SDSSJ025459.59-002722.0, Gaia EDR3 2497917382664718080, Gaia DR2 2497917382664718080, [LCB92] 0252-0039, Gaia DR3 2497917382664718080, USNO-B1.0 0895-00028734
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 54 59.60 (0.3) | 02 54 59.59 | 02 54 59.59 | 02 54 59.60 (0.3) | 02 54 59.60 (0.3) | 02 54 59.59 | ||
| Declination | -00 27 22.26 (0.3) | -00 27 22.22 | -00 27 22.00 | -00 27 22.26 (0.3) | -00 27 22.21 (0.3) | -00 27 22.23 | ||
| Spectral type | sdB | sdB | SDB | |||||
| Effective temperature | [K] | 19281.0 (575) | ||||||
| log(g) | [cgs] | 5.01 (0.02) | ||||||
| Mass | [M☉] | |||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | -0.38 (0.3) | -0.45 (0.4) | -0.45 (0.4) | ||||
| Distance | [pc] | |||||||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -0.070268447 (0.4) | 0.431 (0.7) | 0.431304658 (0.7) | -0.07 (0.4) | 4.7 | ||
| Proper motion (declination) | [mas/yr] | -2.843320732 (0.3) | -2.619 (0.6) | -2.618673555 (0.6) | -2.843 (0.3) | -4.1 | ||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 20.00 | |||||||
| V magnitude | 19.24 | |||||||
| R magnitude | 20.30 | |||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 19.63 (0.03) | 19.63 (0.03) | 19.59 (0.04) | 19.58 (0.04) | ||||
| g magnitude | 19.23 (0.01) | 19.23 (0.01) | 19.41 (0.01) | 19.33 (0.05) | ||||
| r magnitude | 19.53 (0.02) | 19.53 (0.02) | 19.52 (0.02) | 19.53 (0.02) | ||||
| i magnitude | 19.74 (0.02) | 19.74 (0.02) | 19.81 (0.03) | 19.80 (0.03) | ||||
| z magnitude | 19.80 (0.08) | 19.80 (0.08) | 20.06 (0.1) | 20.05 (0.1) | ||||
| G magnitude | 19.38 (0.03) | 19.44 (0.005) | 19.44 | 19.38 (0.005) | ||||
| BP magnitude | 19.42 (0.03) | 19.40 (0.03) | 19.40 | |||||
| RP magnitude | 19.43 (0.1) | 19.41 (0.08) | 19.41 | |||||
| Pan g magnitude | 19.26 (0.02) | 19.26 (0.02) | ||||||
| Pan r magnitude | 19.55 (0.01) | 19.55 (0.01) | ||||||
| Pan i magnitude | 19.81 (0.009) | 19.81 (0.009) | ||||||
| Pan z magnitude | 19.98 (0.01) | 19.98 (0.01) | ||||||
| Pan y magnitude | 19.95 (0.04) | 19.95 (0.04) | ||||||
| E(B-V) | ||||||||
* 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.