All names: Gaia DR3 1886200725594365568, Gaia EDR3 1886200725594365568, UCAC4 599-135975, SDSS J225640.87+294546.7, Gaia DR2 1886200725594365568, LAMOST J225640.87+294546.6, SDSS J225640.87+294546.6, SDSS J225640.87+294546.70, GALEX J225640.8+294546, SDSSJ225640.87+294546.70
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 56 40.88 (0.04) | 22 56 40.88 | 22 56 40.87 | 22 56 40.88 (0.06) | 22 56 40.88 (0.04) | ||||
| Declination | 29 45 46.66 (0.04) | 29 45 46.67 | 29 45 46.70 | 29 45 46.66 (0.06) | 29 45 46.74 (0.04) | ||||
| Spectral type | sdOB | sdO | sdO | ||||||
| Effective temperature | [K] | 36060.0 (1050) | 35440.0 (165) | ||||||
| log(g) | [cgs] | 6.01 (0.07) | 5.84 (0.02) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.33 (0.06) | 0.40 (0.09) | 0.40 (0.09) | 0.33 (0.06) | ||||
| Distance | [pc] | 2987.71 (537) | 2485.71 (575) | 2485.68 (575) | 2987.75 (536) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 0.052302555 (0.05) | 0.171 (0.1) | 0.171108118 (0.1) | 0.052 (0.05) | ||||
| Proper motion (declination) | [mas/yr] | -5.031482508 (0.05) | -5.01 (0.1) | -5.009770491 (0.1) | -5.031 (0.05) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 15.82 (0.005) | 15.82 (0.005) | 15.83 (0.01) | 15.82 (0.005) | |||||
| g magnitude | 16.06 (0.003) | 16.07 (0.003) | 16.09 (0.02) | 16.06 (0.003) | |||||
| r magnitude | 16.55 (0.004) | 16.55 (0.004) | 16.55 (0.02) | 16.55 (0.004) | |||||
| i magnitude | 16.90 (0.005) | 16.90 (0.005) | 16.90 (0.01) | 16.90 (0.005) | |||||
| z magnitude | 17.19 (0.01) | 17.18 (0.01) | 17.18 (0.02) | 17.19 (0.01) | |||||
| G magnitude | 16.32 (0.003) | 16.35 (0.002) | 16.35 | 16.32 (0.003) | |||||
| BP magnitude | 16.19 (0.003) | 16.15 (0.009) | 16.15 | ||||||
| RP magnitude | 16.58 (0.004) | 16.59 (0.006) | 16.59 | ||||||
| Pan g magnitude | 16.16 (0.003) | 16.16 (0.003) | |||||||
| Pan r magnitude | 16.57 (0.002) | 16.57 (0.002) | |||||||
| Pan i magnitude | 16.91 (0.002) | 16.91 (0.002) | |||||||
| Pan z magnitude | 17.17 (0.004) | 17.17 (0.004) | |||||||
| Pan y magnitude | 17.36 (0.009) | 17.36 (0.009) | |||||||
| E(B-V) | 0.059 | ||||||||
* 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.