All names: UCAC4 369-180421, 2MASS J20515013-1621092, Gaia DR3 6883141183010883456, GALEXJ20518-1621, GALEX J205150.0-162109, EC 20490-1632, Gaia DR2 6883141183010883456, Gaia EDR3 6883141183010883456
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 51 50.13 (0.03) | 20 51 50.16 | 20 51 50.14 (0.03) | ||
| Declination | -16 21 09.39 (0.02) | -16 21 09.11 | -16 21 09.21 (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] | 0.96 (0.04) | 1.03 (0.05) | 0.96 (0.04) | |
| Distance | [pc] | 1043.95 (41) | 967.12 (47) | 1043.95 (41) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -7.372 (0.04) | -7.366 (0.08) | -7.372 (0.04) | |
| Proper motion (declination) | [mas/yr] | -10.924 (0.03) | -10.921 (0.06) | -10.924 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.62 | ||||
| V magnitude | 14.89 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.56 (0.06) | 15.56 (0.06) | |||
| H magnitude | 15.47 (0.1) | 15.47 (0.1) | |||
| K magnitude | 15.55 (0.2) | 15.55 (0.2) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 14.86 (0.003) | 14.87 (0.0005) | 14.86 (0.003) | ||
| BP magnitude | 14.73 (0.003) | 14.67 (0.007) | |||
| RP magnitude | 15.09 (0.004) | 15.09 (0.002) | |||
| Pan g magnitude | 14.73 (0.003) | ||||
| Pan r magnitude | 15.11 (0.002) | ||||
| Pan i magnitude | 15.43 (0.002) | ||||
| Pan z magnitude | 15.70 (0.006) | ||||
| Pan y magnitude | 15.86 (0.009) | ||||
| E(B-V) | 0.036 | ||||
* 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.