All names: Gaia EDR3 2712529957779476224, SDSS J224739.96+071732.4, GALEX J224739.9+071732, SDSS J224739.95+071732.5, SDSSJ224739.96+071732.46, Gaia DR3 2712529957779476224, Gaia DR2 2712529957779476224, SDSS J224739.96+071732.46
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 47 39.96 (0.2) | 22 47 39.96 | 22 47 39.96 | 22 47 39.96 (0.3) | 22 47 39.96 (0.2) | ||||
| Declination | 07 17 32.41 (0.2) | 07 17 32.49 | 07 17 32.46 | 07 17 32.41 (0.3) | 07 17 32.48 (0.2) | ||||
| Spectral type | He-sdO | He-sdO | sdOHe | ||||||
| Effective temperature | [K] | 99999.0 (10000) | 99999.0 (10000) | ||||||
| log(g) | [cgs] | 6.60 (1) | 6.59 (1) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.26 (0.2) | 0.41 (0.4) | 0.41 (0.4) | 0.26 (0.2) | ||||
| Distance | [pc] | 3874.14 (3175) | 2438.43 (2202) | 2438.56 (2203) | 3874.47 (3176) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 1.303575552 (0.2) | 0.635 (0.4) | 0.635477103 (0.4) | 1.304 (0.2) | ||||
| Proper motion (declination) | [mas/yr] | -4.60275354 (0.2) | -4.648 (0.5) | -4.648487678 (0.5) | -4.603 (0.2) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 19.20 (0.2) | ||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 18.22 (0.01) | 18.22 (0.01) | 18.21 (0.02) | 18.21 (0.02) | |||||
| g magnitude | 18.49 (0.007) | 18.49 (0.007) | 18.52 (0.02) | 18.51 (0.01) | |||||
| r magnitude | 18.88 (0.01) | 18.88 (0.01) | 18.89 (0.02) | 18.89 (0.02) | |||||
| i magnitude | 19.18 (0.01) | 19.17 (0.01) | 19.17 (0.02) | 19.17 (0.02) | |||||
| z magnitude | 19.47 (0.07) | 19.46 (0.07) | 19.44 (0.06) | 19.44 (0.06) | |||||
| G magnitude | 18.69 (0.02) | 18.72 (0.004) | 18.72 | 18.69 (0.004) | |||||
| BP magnitude | 18.56 (0.02) | 18.55 (0.04) | 18.55 | ||||||
| RP magnitude | 18.94 (0.07) | 18.81 (0.04) | 18.81 | ||||||
| Pan g magnitude | 18.57 (0.006) | 18.57 (0.006) | |||||||
| Pan r magnitude | 18.88 (0.008) | 18.89 (0.008) | |||||||
| Pan i magnitude | 19.18 (0.007) | 19.18 (0.007) | |||||||
| Pan z magnitude | 19.40 (0.02) | 19.40 (0.02) | |||||||
| Pan y magnitude | 19.51 (0.09) | 19.52 (0.09) | |||||||
| E(B-V) | 0.074 | ||||||||
* 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.