All names: Gaia DR2 1792620565667968, [HH86] 0255+029, GALEX J025834.7+031051, Gaia EDR3 1792620565667968, US 3447, PB 6958, Gaia DR3 1792620565667968, PG 0255+029, PG0255+029, TIC 258843350, KUV 02560+0259, 2MASS J02583478+0310524
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 02 58 34.79 (0.04) | 02 58 34.78 | 02 58 34.79 (0.04) | ||
| Declination | 03 10 52.18 (0.04) | 03 10 52.65 | 03 10 52.27 (0.04) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | ||||
| log(g) | [cgs] | ||||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.63 (0.05) | 0.61 (0.06) | 0.63 (0.05) | |
| Distance | [pc] | 1587.30 (119) | 1635.59 (166) | 1587.30 (119) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 4.402 (0.05) | 4.119 (0.1) | 4.402 (0.05) | |
| Proper motion (declination) | [mas/yr] | -6.137 (0.04) | -6.295 (0.1) | -6.137 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.81 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.48 (0.1) | 16.48 (0.1) | |||
| H magnitude | 16.21 | ||||
| K magnitude | 16.14 | ||||
| u magnitude | 15.46 (0.005) | ||||
| g magnitude | 15.74 (0.004) | ||||
| r magnitude | 16.20 (0.004) | ||||
| i magnitude | 16.51 (0.005) | ||||
| z magnitude | 16.79 (0.009) | ||||
| G magnitude | 15.97 (0.003) | 16.00 (0.003) | 15.97 (0.003) | ||
| BP magnitude | 15.83 (0.005) | 15.77 (0.01) | |||
| RP magnitude | 16.22 (0.007) | 16.21 (0.007) | |||
| Pan g magnitude | 15.81 (0.004) | ||||
| Pan r magnitude | 16.20 (0.003) | ||||
| Pan i magnitude | 16.54 (0.002) | ||||
| Pan z magnitude | 16.80 (0.002) | ||||
| Pan y magnitude | 16.98 (0.006) | ||||
| E(B-V) | 0.066 | ||||
* 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.