All names: 2MASS J20235027-2508291, EC 20208-2518, Gaia EDR3 6848992520809972608, GALEX J202350.2-250829, BPS CS 22955-0024, BPSCS22955-0024, Gaia DR3 6848992520809972608, WD 2020-253, Gaia DR2 6848992520809972608, TIC 164546298
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|
| Right ascension | 20 23 50.28 (0.05) | 20 23 50.26 | 20 23 50.28 (0.06) | 20 23 50.29 (0.05) | 20 23 49.37 | ||
| Declination | -25 08 29.21 (0.03) | -25 08 28.80 | -25 08 29.20 (0.04) | -25 08 29.03 (0.03) | -25 08 22.56 | ||
| Spectral type | He-sdO | sdOHe | DC | ||||
| Effective temperature | [K] | 44622.0 (1000) | |||||
| log(g) | [cgs] | 5.80 (0.1) | |||||
| Mass | [M☉] | ||||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | 0.35 (0.06) | 0.43 (0.08) | 0.43 (0.08) | 0.35 (0.06) | ||
| Distance | [pc] | 2866.04 (463) | 2333.18 (437) | 2333.18 (437) | 2866.15 (463) | ||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | -8.787749257 (0.06) | -8.845 (0.1) | -8.845 (0.1) | -8.788 (0.06) | ||
| Proper motion (declination) | [mas/yr] | -10.80564175 (0.04) | -10.825 (0.08) | -10.825 (0.08) | -10.806 (0.04) | ||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | 15.50 | ||||||
| V magnitude | 15.50 | ||||||
| R magnitude | |||||||
| I magnitude | |||||||
| J magnitude | 16.35 (0.09) | 16.35 (0.09) | |||||
| H magnitude | 16.05 (0.2) | 16.05 (0.2) | |||||
| K magnitude | 15.92 | ||||||
| u magnitude | |||||||
| g magnitude | |||||||
| r magnitude | |||||||
| i magnitude | |||||||
| z magnitude | |||||||
| G magnitude | 15.66 (0.002) | 15.68 (0.001) | 15.68 | 15.66 (0.003) | |||
| BP magnitude | 15.52 (0.002) | 15.45 (0.01) | 15.45 | ||||
| RP magnitude | 15.93 (0.003) | 15.91 (0.004) | 15.91 | ||||
| Pan g magnitude | 15.55 (0.001) | ||||||
| Pan r magnitude | 15.91 (0.002) | ||||||
| Pan i magnitude | 16.25 (0.002) | ||||||
| Pan z magnitude | 16.51 (0.004) | ||||||
| Pan y magnitude | 16.71 (0.005) | ||||||
| E(B-V) | 0.075 | ||||||
* 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.