All names: UCAC4 141-204688, EC 20179-6209, Gaia DR3 6430717681761712768, Gaia DR2 6430717681761712768, 2MASS J20221562-6159306, EC20179-6209, TIC 466273074
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 22 15.72 | 20 22 15.63 (0.03) | ||
| Declination | -61 59 30.55 | -61 59 30.75 (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] | 0.74 (0.08) | 0.77 (0.04) | |
| Distance | [pc] | 1346.08 (142) | 1306.17 (73) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.018 (0.09) | 2.964 (0.03) | |
| Proper motion (declination) | [mas/yr] | -16.075 (0.08) | -16.186 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.65 | |||
| V magnitude | 14.85 | |||
| R magnitude | 15.17 (0.1) | |||
| I magnitude | ||||
| J magnitude | 15.33 (0.05) | 15.33 (0.05) | ||
| H magnitude | 15.60 (0.1) | 15.60 (0.1) | ||
| K magnitude | 15.27 (0.1) | 15.27 (0.1) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 14.82 (0.0004) | 14.80 (0.003) | ||
| BP magnitude | 14.64 (0.005) | |||
| RP magnitude | 15.03 (0.002) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.033 | |||
* 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.