All names: Gaia DR2 6795208432068641920, 2MASS J20405909-2938048, EC 20379-2948, UCAC4 302-270187, EC20379-2948, GALEX J204059.0-293803, TIC 212347311, Gaia DR3 6795208432068641920
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 40 59.06 | 20 40 59.10 (0.04) | ||
| Declination | -29 38 04.45 | -29 38 04.87 (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] | 0.45 (0.07) | 0.41 (0.05) | |
| Distance | [pc] | 2235.14 (340) | 2464.27 (312) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 2.462 (0.1) | 2.509 (0.05) | |
| Proper motion (declination) | [mas/yr] | -1.29 (0.07) | -1.203 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.75 (0.02) | |||
| V magnitude | 15.97 (0.01) | |||
| R magnitude | 16.19 (0.2) | |||
| I magnitude | ||||
| J magnitude | 16.40 (0.1) | 16.40 (0.1) | ||
| H magnitude | 15.87 | |||
| K magnitude | 17.10 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.82 (0.0007) | 15.80 (0.003) | ||
| BP magnitude | 15.60 (0.006) | |||
| RP magnitude | 16.07 (0.003) | |||
| Pan g magnitude | 15.65 (0.008) | |||
| Pan r magnitude | 16.06 (0.002) | |||
| Pan i magnitude | 16.41 (0.002) | |||
| Pan z magnitude | 16.68 (0.005) | |||
| Pan y magnitude | 16.85 (0.01) | |||
| 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.