All names: PG1255+089, SDSS J125740.74+083750.4, GALEX J125740.8+083750, Gaia EDR3 3733729870595798784, Gaia DR2 3733729866298688640, PG 1255+089, Gaia DR3 3733729870595798784, USNO-B1.0 0986-00228317, SDSS J125740.73+083750.34, SDSS J125740.73+083750.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 57 40.73 (0.07) | 12 57 40.74 | 12 57 40.83 | 12 57 40.73 (0.08) | 12 57 40.75 (0.07) | ||||
| Declination | 08 37 50.28 (0.05) | 08 37 50.49 | 08 37 51.18 | 08 37 50.29 (0.06) | 08 37 50.51 (0.05) | ||||
| Spectral type | sdB | B/sdB | sdB | ||||||
| Effective temperature | [K] | 27312.0 (848) | 30082.0 (147) | ||||||
| log(g) | [cgs] | 5.43 (0.1) | 5.37 (0.03) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.19 (0.09) | 0.11 (0.09) | 0.11 (0.09) | 0.19 (0.09) | ||||
| Distance | [pc] | 5398.13 (2514) | 9000.90 (7680) | 9000.90 (7680) | 5399.57 (2516) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -19.31902486 (0.1) | -19.576 (0.2) | -19.576 (0.2) | -19.319 (0.1) | ||||
| Proper motion (declination) | [mas/yr] | -14.16292007 (0.1) | -14.172 (0.1) | -14.172 (0.1) | -14.163 (0.1) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 16.30 | ||||||||
| V magnitude | |||||||||
| R magnitude | 17.00 | ||||||||
| I magnitude | |||||||||
| J magnitude | 17.40 (0.03) | ||||||||
| H magnitude | 17.42 (0.04) | ||||||||
| K magnitude | 17.70 (0.1) | ||||||||
| u magnitude | 16.45 (0.006) | 16.45 (0.006) | 16.49 (0.02) | 16.45 (0.006) | |||||
| g magnitude | 16.51 (0.004) | 16.51 (0.004) | 16.54 (0.01) | 16.51 (0.004) | |||||
| r magnitude | 17.00 (0.004) | 17.00 (0.004) | 17.00 (0.01) | 17.00 (0.004) | |||||
| i magnitude | 17.33 (0.006) | 17.33 (0.006) | 17.33 (0.02) | 17.33 (0.006) | |||||
| z magnitude | 17.65 (0.01) | 17.65 (0.01) | 17.64 (0.02) | 17.65 (0.01) | |||||
| G magnitude | 16.77 (0.004) | 16.78 (0.001) | 16.78 | 16.77 (0.003) | |||||
| BP magnitude | 16.64 (0.004) | 16.59 (0.006) | 16.59 | ||||||
| RP magnitude | 17.02 (0.007) | 17.02 (0.01) | 17.02 | ||||||
| Pan g magnitude | 16.58 (0.003) | 16.58 (0.003) | |||||||
| Pan r magnitude | 17.00 (0.002) | 17.00 (0.002) | |||||||
| Pan i magnitude | 17.34 (0.003) | 17.34 (0.003) | |||||||
| Pan z magnitude | 17.62 (0.007) | 17.62 (0.007) | |||||||
| Pan y magnitude | 17.79 (0.008) | 17.79 (0.008) | |||||||
| E(B-V) | 0.022 | ||||||||
* 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.