All names: PG 1538+611, Gaia DR2 1627338098861025792, SDSS J153943.19+605500.8, SDSS J153943.18+605500.9, Gaia DR3 1627338098861025792, SDSS J153943.18+605500.8, PG1538+611, GALEX J153943.0+605500
| Parameter | Unit | Geier 2020 | Simbad |
|---|---|---|---|
| Right ascension | 15 39 43.14 | 15 39 43.20 (0.8) | |
| Declination | 60 54 59.45 | 60 55 00.82 (0.8) | |
| 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] | ||
| Distance | [pc] | ||
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | ||
| Proper motion (declination) | [mas/yr] | ||
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | |||
| V magnitude | |||
| R magnitude | |||
| I magnitude | |||
| J magnitude | 13.54 (0.03) | ||
| H magnitude | 13.22 (0.03) | ||
| K magnitude | 13.18 (0.03) | ||
| u magnitude | 15.07 (0.004) | 15.05 (0.004) | |
| g magnitude | 15.03 (0.003) | 15.01 (0.003) | |
| r magnitude | 15.25 (0.004) | 15.25 (0.004) | |
| i magnitude | 15.34 (0.004) | 15.33 (0.004) | |
| z magnitude | 15.44 (0.006) | 15.43 (0.006) | |
| G magnitude | 15.18 (0.003) | 15.35 (0.009) | |
| BP magnitude | 15.07 (0.006) | ||
| RP magnitude | 15.04 (0.004) | ||
| Pan g magnitude | 15.14 (0.01) | ||
| Pan r magnitude | 15.27 (0.006) | ||
| Pan i magnitude | 15.39 (0.003) | ||
| Pan z magnitude | 15.50 (0.002) | ||
| Pan y magnitude | 15.54 (0.01) | ||
| 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.