All names: GALEX J124451.1+435253, Ton 123, LAMOST J124451.20+435252.5, SDSS J124451.20+435252.5, Gaia DR2 1540815913964920448, PG1242+441, HIDDEN NAME PG 1242+441, Gaia DR3 1540815913964920448, FBS B 312, Gaia EDR3 1540815913964920448, PG 1242+442, FBS 1242+441
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 12 44 51.19 (0.03) | 12 44 51.21 | 12 44 51.20 (0.03) | ||
| Declination | 43 52 52.45 (0.04) | 43 52 52.97 | 43 52 52.62 (0.04) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 29760.0 (1790) | |||
| log(g) | [cgs] | 5.50 (0.3) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.53 (0.07) | 0.47 (0.08) | 0.53 (0.07) | |
| Distance | [pc] | 1869.86 (240) | 2110.15 (358) | 1869.86 (240) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.291 (0.04) | -2.127 (0.08) | -2.291 (0.04) | |
| Proper motion (declination) | [mas/yr] | -11.049 (0.05) | -11.581 (0.1) | -11.049 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.60 | ||||
| V magnitude | 16.50 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 16.11 (0.005) | 16.11 (0.005) | |||
| g magnitude | 16.30 (0.003) | 16.30 (0.003) | |||
| r magnitude | 16.72 (0.004) | 16.72 (0.004) | |||
| i magnitude | 16.95 (0.005) | 16.95 (0.005) | |||
| z magnitude | 17.14 (0.01) | 17.14 (0.01) | |||
| G magnitude | 16.51 (0.003) | 16.53 (0.0008) | 16.51 (0.003) | ||
| BP magnitude | 16.42 (0.004) | 16.35 (0.007) | |||
| RP magnitude | 16.64 (0.006) | 16.64 (0.005) | |||
| Pan g magnitude | 16.39 (0.005) | ||||
| Pan r magnitude | 16.73 (0.003) | ||||
| Pan i magnitude | 16.99 (0.003) | ||||
| Pan z magnitude | 17.14 (0.003) | ||||
| Pan y magnitude | 17.23 (0.007) | ||||
| E(B-V) | 0.019 | ||||
* 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.