All names: TIC 257390150, SDSS J225638.34+065651.1, LAMOST J225638.34+065651.1, 2MASS J22563834+0656512, Gaia DR3 2712047826225618048, Gaia DR2 2712047826225618048, PG 2254+067, HS 2254+0640, PG2254+067, SDSS J225638.34+065651.0, GALEX J225638.3+065651
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 56 38.36 | 22 56 38.35 (0.04) | ||
| Declination | 06 56 51.33 | 06 56 51.18 (0.04) | ||
| Spectral type | sdB+WD | sdB | ||
| Effective temperature | [K] | 28500.0 (500) | ||
| log(g) | [cgs] | 5.64 (0.05) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.93 (0.07) | 0.91 (0.05) | |
| Distance | [pc] | 1080.15 (77) | 1103.63 (60) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -4.414 (0.1) | -4.525 (0.05) | |
| Proper motion (declination) | [mas/yr] | -3.108 (0.08) | -3.049 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.18 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.66 (0.06) | 15.74 (0.006) | ||
| H magnitude | 15.84 (0.2) | 15.79 (0.01) | ||
| K magnitude | 15.67 (0.2) | 15.94 (0.02) | ||
| u magnitude | 14.94 (0.004) | 14.94 (0.004) | ||
| g magnitude | 15.03 (0.003) | 15.03 (0.003) | ||
| r magnitude | 15.43 (0.004) | 15.43 (0.004) | ||
| i magnitude | 15.73 (0.004) | 15.73 (0.004) | ||
| z magnitude | 16.01 (0.007) | 16.01 (0.007) | ||
| G magnitude | 15.26 (0.0007) | 15.24 (0.003) | ||
| BP magnitude | 15.11 (0.007) | |||
| RP magnitude | 15.42 (0.003) | |||
| Pan g magnitude | 15.10 (0.005) | |||
| Pan r magnitude | 15.45 (0.003) | |||
| Pan i magnitude | 15.76 (0.001) | |||
| Pan z magnitude | 16.00 (0.004) | |||
| Pan y magnitude | 16.16 (0.004) | |||
| E(B-V) | 0.063 | |||
* 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.