All names: TIC 233399340, Gaia DR2 2185808122219021056, 2MASS J20073905+5445166, GALEX J200739.0+544516, GALEX J200739.1+544516, Gaia DR3 2185808122219021056, O11J200739+544516
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 07 39.00 | 20 07 39.11 (0.05) | ||
| Declination | 54 45 16.00 | 54 45 16.60 (0.05) | ||
| Spectral type | sd | |||
| 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] | 0.32 (0.06) | 0.31 (0.05) | |
| Distance | [pc] | 3156.57 (602) | 3180.66 (532) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.92 (0.1) | -2.877 (0.06) | |
| Proper motion (declination) | [mas/yr] | -4.975 (0.1) | -4.738 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.81 (0.1) | 16.81 (0.1) | ||
| H magnitude | 16.29 (0.2) | 16.29 (0.2) | ||
| K magnitude | 15.84 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 17.03 (0.003) | 17.01 (0.003) | ||
| BP magnitude | 17.01 (0.01) | |||
| RP magnitude | 16.93 (0.02) | |||
| Pan g magnitude | 17.00 (0.003) | |||
| Pan r magnitude | 17.07 (0.003) | |||
| Pan i magnitude | 17.34 (0.007) | |||
| Pan z magnitude | 17.51 (0.01) | |||
| Pan y magnitude | 17.59 (0.03) | |||
| E(B-V) | 0.224 | |||
* 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.