All names: EC 20419-1529, UCAC4 374-173752, Gaia EDR3 6887165704802737920, 2MASS J20444190-1518158, GALEX J204441.9-151815, Gaia DR3 6887165983976982016, GALEXJ20446-1518, Gaia DR2 6887165983976982016
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 44 47.20 (0.4) | 20 44 41.91 | 20 44 41.90 (0.01) | ||
| Declination | -15 18 44.86 (0.2) | -15 18 15.12 | -15 18 15.84 (0.007) | ||
| Spectral type | sdB+MS | 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] | 1.66 (0.4) | 0.82 (0.02) | 0.85 (0.01) | |
| Distance | [pc] | 600.89 (153) | 1215.07 (36) | 1171.78 (20) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -0.889 (0.4) | 3.877 (0.04) | 3.868 (0.02) | |
| Proper motion (declination) | [mas/yr] | -7.386 (0.4) | -9.764 (0.03) | -9.719 (0.01) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.66 (0.01) | ||||
| V magnitude | 13.29 (0.01) | ||||
| R magnitude | 13.47 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 12.61 (0.03) | 12.61 (0.03) | |||
| H magnitude | 12.43 (0.03) | 12.43 (0.03) | |||
| K magnitude | 12.39 (0.03) | 12.39 (0.03) | |||
| u magnitude | 14.25 (0.004) | ||||
| g magnitude | 13.47 (0.01) | ||||
| r magnitude | 13.41 (0.003) | 13.23 (0.01) | |||
| i magnitude | 13.47 (0.001) | 13.22 (0.01) | |||
| z magnitude | 13.52 (0.005) | ||||
| G magnitude | 19.88 (0.005) | 13.26 (0.0002) | 13.25 (0.003) | ||
| BP magnitude | 20.28 (0.07) | 13.39 (0.003) | |||
| RP magnitude | 19.33 (0.06) | 12.97 (0.0007) | |||
| Pan g magnitude | 13.43 (0.004) | ||||
| Pan r magnitude | 13.43 | ||||
| Pan i magnitude | 13.39 | ||||
| Pan z magnitude | 13.38 (0.004) | ||||
| Pan y magnitude | 13.37 (0.003) | ||||
| E(B-V) | 0.043 | ||||
* 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.