All names: Gaia DR3 6672560177731953408, EC 20088-4559, GALEX J201220.8-455039, BPSCS22943-19, BPS CS 22943-0019, Gaia DR2 6672560177731953408, 2MASS J20122087-4550396, UCAC4 221-182051, TIC 129211288
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 12 20.87 | 20 12 20.90 (0.05) | ||
| Declination | -45 50 39.30 | -45 50 39.58 (0.04) | ||
| 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] | 0.35 (0.08) | 0.33 (0.06) | |
| Distance | [pc] | 2884.34 (628) | 2986.86 (554) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.406 (0.1) | -3.26 (0.05) | |
| Proper motion (declination) | [mas/yr] | -4.243 (0.09) | -4.293 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.57 (0.03) | |||
| V magnitude | 15.82 (0.01) | |||
| R magnitude | 15.78 | |||
| I magnitude | ||||
| J magnitude | 16.51 (0.1) | 16.51 (0.1) | ||
| H magnitude | 16.27 (0.2) | 16.27 (0.2) | ||
| K magnitude | 17.11 | |||
| u magnitude | ||||
| g magnitude | 15.52 (0.01) | |||
| r magnitude | 15.99 (0.01) | |||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.75 (0.001) | 15.73 (0.003) | ||
| BP magnitude | 15.51 (0.009) | |||
| RP magnitude | 16.02 (0.01) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.027 | |||
* 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.