All names: EC 20387-1716, 2MASS J20413621-1705554, Gaia DR3 6862119040377175808, Gaia DR2 6862119040377175808, UCAC4 365-184987, EC20387-1716
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 41 36.30 | 20 41 36.22 (0.01) | ||
| Declination | -17 05 55.03 | -17 05 55.50 (0.007) | ||
| Spectral type | sdB+F | sdB+F | ||
| 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] | 0.68 (0.03) | 0.74 (0.02) | |
| Distance | [pc] | 1472.10 (68) | 1350.07 (30) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.744 (0.05) | 3.604 (0.02) | |
| Proper motion (declination) | [mas/yr] | -11.482 (0.03) | -11.503 (0.01) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.06 (0.01) | |||
| V magnitude | 13.73 (0.01) | |||
| R magnitude | 13.86 (0.08) | |||
| I magnitude | ||||
| J magnitude | 13.07 (0.03) | 13.07 (0.03) | ||
| H magnitude | 12.84 (0.03) | 12.84 (0.03) | ||
| K magnitude | 12.80 (0.03) | 12.80 (0.03) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 13.73 (0.0003) | 13.71 (0.003) | ||
| BP magnitude | 13.85 (0.002) | |||
| RP magnitude | 13.44 (0.001) | |||
| Pan g magnitude | 13.88 (0.002) | |||
| Pan r magnitude | 13.79 (0.02) | |||
| Pan i magnitude | 13.78 (0.004) | |||
| Pan z magnitude | 13.83 (0.003) | |||
| Pan y magnitude | 13.82 (0.003) | |||
| E(B-V) | 0.046 | |||
* 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.