All names: PG1508+257, Gaia DR2 1265072107253012096, Gaia DR3 1265072107253012096, SDSS J151033.43+253002.1, PG 1508+257, UCAC4 578-052786, Ton 220, GALEX J151033.4+253001
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 15 10 33.43 | 15 10 33.43 (0.03) | ||
| Declination | 25 30 02.96 | 25 30 02.16 (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] | 0.30 (0.07) | 0.41 (0.05) | |
| Distance | [pc] | 3291.64 (806) | 2426.60 (307) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.025 (0.1) | -1.807 (0.04) | |
| Proper motion (declination) | [mas/yr] | -13.952 (0.1) | -13.912 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.05 (0.04) | |||
| V magnitude | 16.05 (0.01) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 15.76 (0.005) | 15.78 (0.02) | ||
| g magnitude | 15.90 (0.003) | 15.91 (0.01) | ||
| r magnitude | 16.36 (0.004) | 16.36 (0.02) | ||
| i magnitude | 16.69 (0.005) | 16.69 (0.01) | ||
| z magnitude | 16.99 (0.01) | 16.99 (0.02) | ||
| G magnitude | 16.17 (0.002) | 16.14 (0.003) | ||
| BP magnitude | 15.99 (0.008) | |||
| RP magnitude | 16.36 (0.006) | |||
| Pan g magnitude | 15.97 (0.002) | |||
| Pan r magnitude | 16.37 (0.001) | |||
| Pan i magnitude | 16.70 (0.002) | |||
| Pan z magnitude | 16.96 (0.006) | |||
| Pan y magnitude | 17.14 (0.006) | |||
| E(B-V) | 0.043 | |||
* 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.