All names: SDSS J224518.65+220746.6, SDSS J224518.66+220746.6, GALEX J224518.6+220746, SDSSJ224518.65+220746.5, SDSS J224518.65+220746.5, Gaia EDR3 2836486532168853760, Gaia DR2 2836486532168853760, Gaia DR3 2836486532168853760
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 22 45 18.65 (0.04) | 22 45 18.65 | 22 45 18.65 (0.04) | ||
| Declination | 22 07 46.64 (0.05) | 22 07 46.50 | 22 07 46.64 (0.05) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 34000.0 (800) | |||
| log(g) | [cgs] | 5.82 (0.07) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.45 (0.06) | 0.49 (0.1) | 0.45 (0.06) | |
| Distance | [pc] | 2201.67 (292) | 2058.88 (415) | 2201.67 (292) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.885 (0.07) | -2.888 (0.2) | -2.885 (0.07) | |
| Proper motion (declination) | [mas/yr] | -0.206 (0.06) | -0.071 (0.1) | -0.206 (0.06) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 16.05 (0.005) | 16.05 (0.005) | |||
| g magnitude | 16.31 (0.004) | 16.31 (0.004) | |||
| r magnitude | 16.79 (0.005) | 16.79 (0.005) | |||
| i magnitude | 17.13 (0.006) | 17.13 (0.006) | |||
| z magnitude | 17.45 (0.01) | 17.45 (0.01) | |||
| G magnitude | 16.56 (0.003) | 16.58 (0.002) | 16.56 (0.003) | ||
| BP magnitude | 16.43 (0.004) | 16.38 (0.006) | |||
| RP magnitude | 16.84 (0.009) | 16.84 (0.005) | |||
| Pan g magnitude | 16.40 (0.009) | ||||
| Pan r magnitude | 16.81 (0.003) | ||||
| Pan i magnitude | 17.17 (0.002) | ||||
| Pan z magnitude | 17.43 (0.007) | ||||
| Pan y magnitude | 17.63 (0.01) | ||||
| E(B-V) | 0.054 | ||||
* 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.