All names: Gaia DR2 3683849391728631424, Gaia DR3 3683849391728631424, PG 1244-004, Ton 126, LAMOST J124706.84-003925.7, SDSS J124706.78-003925.8, SDSS J124706.79-003925.81, Gaia EDR3 3683849391728631424, SDSS J124706.79-003925.8, UCAC4 447-054161, PG1244-004, FBS 1244-003, SDSS J124706.78-003925.7, GALEX J124706.8-003925
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Harris et al. 2003 | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 47 06.80 (0.06) | 12 47 06.79 | 12 47 06.79 | 12 47 06.78 | 12 47 06.80 (0.09) | 12 47 06.79 (0.06) | 12 47 06.78 | |||||
| Declination | -00 39 25.81 (0.04) | -00 39 25.80 | -00 39 25.80 | -00 39 25.81 | -00 39 25.81 (0.06) | -00 39 25.78 (0.04) | -00 39 25.80 | |||||
| Spectral type | sdOB | A/sdB | sdB | sdBO | SDB | |||||||
| Effective temperature | [K] | 43174.0 (327) | 37952.0 (286) | |||||||||
| log(g) | [cgs] | 5.86 (0.03) | 5.75 (0.04) | |||||||||
| Mass | [M☉] | |||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 0.49 (0.07) | 0.29 (0.1) | 0.29 (0.1) | 0.49 (0.07) | |||||||
| Distance | [pc] | 2048.91 (307) | 3498.95 (1199) | 3498.43 (1198) | 2048.76 (307) | |||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 5.836172438 (0.1) | 5.583 (0.3) | 5.582937651 (0.3) | 5.836 (0.1) | 8.7 | ||||||
| Proper motion (declination) | [mas/yr] | -1.920382501 (0.07) | -2.091 (0.1) | -2.090812039 (0.1) | -1.92 (0.07) | -2.1 | ||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | 16.27 (0.07) | |||||||||||
| V magnitude | 16.47 (0.1) | |||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 17.14 (0.02) | |||||||||||
| H magnitude | 17.16 (0.04) | |||||||||||
| K magnitude | 17.11 (0.08) | |||||||||||
| u magnitude | 15.79 (0.005) | 15.79 (0.005) | 15.79 (0.005) | 15.78 (0.02) | 15.78 | 15.79 (0.005) | 15.77 (0.02) | |||||
| g magnitude | 16.14 (0.004) | 16.14 (0.004) | 16.14 (0.004) | 16.18 (0.02) | 16.18 | 16.14 (0.004) | 16.19 (0.02) | |||||
| r magnitude | 16.70 (0.004) | 16.70 (0.004) | 16.70 (0.004) | 16.70 (0.02) | 16.70 | 16.70 (0.004) | 16.70 (0.02) | |||||
| i magnitude | 17.04 (0.005) | 17.04 (0.005) | 17.04 (0.005) | 17.03 (0.02) | 17.02 | 17.04 (0.005) | 17.03 (0.02) | |||||
| z magnitude | 17.36 (0.01) | 17.36 (0.01) | 17.36 (0.01) | 17.37 (0.02) | 17.34 | 17.36 (0.01) | 17.36 (0.02) | |||||
| G magnitude | 16.44 (0.003) | 16.46 (0.002) | 16.46 | 16.44 (0.003) | ||||||||
| BP magnitude | 16.28 (0.003) | 16.23 (0.009) | 16.23 | |||||||||
| RP magnitude | 16.75 (0.005) | 16.73 (0.008) | 16.73 | |||||||||
| Pan g magnitude | 16.26 (0.003) | 16.26 (0.003) | ||||||||||
| Pan r magnitude | 16.71 (0.003) | 16.71 (0.003) | ||||||||||
| Pan i magnitude | 17.09 (0.005) | 17.09 (0.005) | ||||||||||
| Pan z magnitude | 17.33 (0.003) | 17.33 (0.003) | ||||||||||
| Pan y magnitude | 17.53 (0.005) | 17.53 (0.005) | ||||||||||
| 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.