All names: 2MASS J12540833+0143244, TIC 397068055, Gaia EDR3 3690648771635312512, HE 1251+0159, LAMOST J125408.32+014323.9, PG1251+019, Balloon 111112002, LAMOST J125408.32+014324.1, [HMD92] 862-2, SDSS J125408.32+014324.1, GALEX J125408.3+014324, Gaia DR2 3690648771635312512, LAMOST J125408.37+014324.2, SDSS J125408.32+014324.0, PG 1251+019, Gaia DR3 3690648771635312512
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 54 08.33 (0.05) | 12 54 08.32 | 12 54 08.32 | 12 54 08.33 (0.06) | 12 54 08.32 (0.05) | 12 54 08.32 | |||
| Declination | 01 43 23.76 (0.03) | 01 43 24.06 | 01 43 25.34 | 01 43 23.77 (0.04) | 01 43 24.11 (0.03) | 01 43 24.05 | |||
| Spectral type | He-sdO | sdOHe | SDO | ||||||
| Effective temperature | [K] | 48208.0 (1000) | 78261.0 (12881) | ||||||
| log(g) | [cgs] | 5.98 (0.1) | 5.24 (0.3) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.34 (0.05) | 0.36 (0.07) | 0.36 (0.07) | 0.34 (0.05) | ||||
| Distance | [pc] | 2932.89 (444) | 2742.73 (538) | 2742.66 (537) | 2932.55 (444) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 3.931774488 (0.06) | 3.823 (0.2) | 3.823216246 (0.2) | 3.932 (0.06) | 5.4 | |||
| Proper motion (declination) | [mas/yr] | -21.98730079 (0.05) | -22.047 (0.09) | -22.04697132 (0.09) | -21.987 (0.06) | -25.9 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.24 | ||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.32 (0.1) | 16.32 (0.1) | |||||||
| H magnitude | 15.89 | 16.42 (0.02) | |||||||
| K magnitude | 15.40 | 16.59 (0.05) | |||||||
| u magnitude | 14.82 (0.004) | 14.82 (0.004) | 14.82 (0.004) | 14.85 (0.03) | |||||
| g magnitude | 15.23 (0.003) | 15.23 (0.003) | 15.23 (0.003) | 15.29 (0.04) | |||||
| r magnitude | 15.79 (0.004) | 15.79 (0.004) | 15.79 (0.004) | 15.79 (0.02) | |||||
| i magnitude | 16.17 (0.005) | 16.17 (0.005) | 16.17 (0.005) | 16.17 (0.01) | |||||
| z magnitude | 16.52 (0.009) | 16.52 (0.009) | 16.52 (0.009) | 16.50 (0.02) | |||||
| G magnitude | 15.52 (0.002) | 15.53 (0.0007) | 15.53 | 15.52 (0.003) | |||||
| BP magnitude | 15.35 (0.002) | 15.29 (0.005) | 15.29 | ||||||
| RP magnitude | 15.85 (0.003) | 15.85 (0.004) | 15.85 | ||||||
| Pan g magnitude | 15.34 (0.003) | 15.34 (0.003) | |||||||
| Pan r magnitude | 15.80 (0.003) | 15.80 (0.003) | |||||||
| Pan i magnitude | 16.19 (0.002) | 16.19 (0.002) | |||||||
| Pan z magnitude | 16.47 (0.004) | 16.47 (0.004) | |||||||
| Pan y magnitude | 16.68 (0.004) | 16.68 (0.004) | |||||||
| E(B-V) | 0.021 | ||||||||
* 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.