All names: Gaia DR2 2185841249306525696, UCAC4 726-064016, GALEX J200934.4+550525, WISEA J200934.38+550525.6, O11J200934+550525, Gaia DR3 2185841249306525696, WISE J200934.41+550525.6, 2MASS J20093442+5505259, TIC 233422848
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 09 34.00 | 20 09 34.41 (0.03) | ||
| Declination | 55 05 25.00 | 55 05 25.79 (0.04) | ||
| 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] | 0.55 (0.05) | 0.57 (0.04) | |
| Distance | [pc] | 1802.45 (159) | 1751.01 (114) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.472 (0.1) | -0.563 (0.05) | |
| Proper motion (declination) | [mas/yr] | -8.952 (0.09) | -8.883 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.76 (0.05) | 15.76 (0.05) | ||
| H magnitude | 15.52 (0.1) | 15.52 (0.1) | ||
| K magnitude | 15.44 (0.2) | 15.44 (0.2) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.57 (0.003) | 16.52 (0.005) | ||
| BP magnitude | 16.74 (0.02) | |||
| RP magnitude | 16.24 (0.01) | |||
| Pan g magnitude | 16.75 (0.009) | |||
| Pan r magnitude | 16.59 (0.01) | |||
| Pan i magnitude | 16.42 (0.01) | |||
| Pan z magnitude | 16.67 (0.02) | |||
| Pan y magnitude | 16.60 (0.02) | |||
| E(B-V) | 0.248 | |||
* 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.