All names: WISEA J182025.42-642759.9, WISE J182025.42-642759.8, 2MASS J18202540-6427596, GALEX J182025.6-642758, UCAC4 128-169984, Gaia DR3 6629561267269651968, Gaia DR2 6629561267269651968, TIC 365771053, GALEXJ18204-6427, DENIS J182025.4-642759, UCAC2 3599628
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 20 25.70 | 18 20 25.42 (0.008) | ||
| Declination | -64 27 58.87 | -64 27 59.68 (0.01) | ||
| Spectral type | sdB+MS | 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] | 1.32 (0.02) | 1.22 (0.02) | |
| Distance | [pc] | 757.46 (12) | 819.34 (12) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 4.7 (0.02) | 4.927 (0.01) | |
| Proper motion (declination) | [mas/yr] | -24.224 (0.03) | -24.089 (0.01) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.72 (0.03) | |||
| V magnitude | 13.49 (0.01) | |||
| R magnitude | 13.57 (0.09) | |||
| I magnitude | 13.14 (0.03) | |||
| J magnitude | 12.75 (0.02) | 12.75 (0.02) | ||
| H magnitude | 12.47 (0.02) | 12.47 (0.02) | ||
| K magnitude | 12.38 (0.03) | 12.38 (0.03) | ||
| u magnitude | ||||
| g magnitude | 13.56 (0.02) | |||
| r magnitude | 13.48 (0.03) | |||
| i magnitude | 13.44 (0.03) | |||
| z magnitude | ||||
| G magnitude | 13.37 (0.0005) | 13.36 (0.003) | ||
| BP magnitude | 13.47 (0.004) | |||
| RP magnitude | 13.08 (0.002) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.062 | |||
* 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.