All names: EC 20474-4444, Gaia DR3 6484466208173377664, EC20474-4444, UCAC4 228-197344, 2MASS J20505096-4433292, TIC 91392524, Gaia DR2 6484466208173377664
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 50 50.92 | 20 50 50.97 (0.04) | ||
| Declination | -44 33 29.45 | -44 33 29.28 (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] | 0.25 (0.07) | 0.22 (0.05) | |
| Distance | [pc] | 3961.97 (1146) | 4524.89 (925) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 5.267 (0.1) | 5.424 (0.04) | |
| Proper motion (declination) | [mas/yr] | -9.958 (0.1) | -9.794 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.46 (0.03) | |||
| V magnitude | 15.54 (0.08) | |||
| R magnitude | 15.68 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.77 (0.07) | 15.77 (0.07) | ||
| H magnitude | 15.73 (0.2) | 15.73 (0.2) | ||
| K magnitude | 15.87 (0.2) | 15.87 (0.2) | ||
| u magnitude | ||||
| g magnitude | 15.38 (0.01) | |||
| r magnitude | 15.79 (0.01) | |||
| i magnitude | 16.26 (0.01) | |||
| z magnitude | ||||
| G magnitude | 15.53 (0.0005) | 15.51 (0.003) | ||
| BP magnitude | 15.41 (0.003) | |||
| RP magnitude | 15.63 (0.003) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.022 | |||
* 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.