All names: UCAC4 117-141145, Gaia DR3 6425116906967210496, Gaia DR2 6425116906967210496, GALEX J205416.5-664027, TIC 372222622, 2MASS J20541664-6640278, Gaia EDR3 6425117005750097408, EC 20498-6651, EC20498-6651
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 54 24.41 (0.5) | 20 54 16.73 | 20 54 16.65 (0.02) | ||
| Declination | -66 39 55.61 (0.8) | -66 40 27.12 | -66 40 27.99 (0.02) | ||
| 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] | 2.43 (1) | 0.29 (0.05) | 0.42 (0.03) | |
| Distance | [pc] | 411.18 (187) | 3390.98 (523) | 2406.74 (185) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 4.35 (0.6) | 6.652 (0.05) | 6.615 (0.02) | |
| Proper motion (declination) | [mas/yr] | -5.426 (0.7) | -14.744 (0.06) | -14.795 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.94 (0.06) | ||||
| V magnitude | 15.67 (0.01) | ||||
| R magnitude | 16.05 (0.2) | ||||
| I magnitude | |||||
| J magnitude | 15.05 (0.04) | 15.05 (0.04) | |||
| H magnitude | 14.72 (0.07) | 14.72 (0.07) | |||
| K magnitude | 14.64 (0.09) | 14.64 (0.09) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | 15.70 (0.01) | ||||
| z magnitude | |||||
| G magnitude | 20.69 (0.008) | 15.63 (0.0005) | 15.61 (0.003) | ||
| BP magnitude | 20.97 (0.2) | 15.69 (0.004) | |||
| RP magnitude | 20.00 (0.1) | 15.42 (0.002) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.029 | ||||
* 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.