All names: EC 20442-3716, EC20442-3716, UCAC4 265-191836, TIC 389422302, Gaia DR2 6778261315752428800, 2MASS J20472513-3705336, GALEX J204725.1-370533, Gaia DR3 6778261315752428800
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 47 25.08 | 20 47 25.13 (0.04) | ||
| Declination | -37 05 33.32 | -37 05 33.53 (0.03) | ||
| 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] | 0.01 (0.09) | 0.05 (0.05) | |
| Distance | [pc] | 90909.09 (757851) | 18484.29 (18279) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.586 (0.1) | -2.568 (0.05) | |
| Proper motion (declination) | [mas/yr] | -6.815 (0.1) | -6.861 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.02 (0.07) | |||
| V magnitude | 16.04 (0.02) | |||
| R magnitude | 16.00 (0.3) | |||
| I magnitude | ||||
| J magnitude | 16.31 (0.09) | 16.31 (0.09) | ||
| H magnitude | 16.68 | |||
| K magnitude | 15.47 | |||
| u magnitude | ||||
| g magnitude | 15.96 (0.01) | |||
| r magnitude | 16.26 (0.09) | |||
| i magnitude | 16.29 (0.01) | |||
| z magnitude | ||||
| G magnitude | 16.07 (0.0009) | 16.05 (0.003) | ||
| BP magnitude | 16.00 (0.004) | |||
| RP magnitude | 16.14 (0.003) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.037 | |||
* 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.