All names: SDSS J221825.87+393823.5, 2MASS J22182588+3938235, GALEX J221825.9+393823, SDSSJ221825.87+393823.5, Gaia DR2 1956924886907715072, Gaia DR3 1956924886907715072, TIC 120053255
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 18 25.88 | 22 18 25.88 (0.02) | ||
| Declination | 39 38 23.53 | 39 38 23.50 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.06 (0.04) | 0.05 (0.03) | |
| Distance | [pc] | 16077.17 (11476) | 19607.84 (11380) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.156 (0.05) | -0.247 (0.02) | |
| Proper motion (declination) | [mas/yr] | -1.471 (0.06) | -1.587 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.66 (0.06) | 15.66 (0.06) | ||
| H magnitude | 15.70 (0.2) | 15.70 (0.2) | ||
| K magnitude | 15.81 | |||
| u magnitude | 15.89 (0.005) | 15.89 (0.005) | ||
| g magnitude | 15.39 (0.003) | 15.39 (0.003) | ||
| r magnitude | 15.67 (0.004) | 15.66 (0.003) | ||
| i magnitude | 15.86 (0.004) | 15.85 (0.004) | ||
| z magnitude | 16.05 (0.007) | 16.05 (0.007) | ||
| G magnitude | 15.57 (0.0008) | 15.55 (0.003) | ||
| BP magnitude | 15.53 (0.004) | |||
| RP magnitude | 15.57 (0.003) | |||
| Pan g magnitude | 15.50 (0.004) | |||
| Pan r magnitude | 15.71 (0.003) | |||
| Pan i magnitude | 15.92 (0.003) | |||
| Pan z magnitude | 16.10 (0.006) | |||
| Pan y magnitude | 16.15 (0.005) | |||
| E(B-V) | 0.107 | |||
* 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.