All names: TIC 34520844, WISE J202139.11-342546.2, Gaia DR2 6696646423047419264, 2MASS J20213910-3425462, GALEXJ20216-3425, UCAC4 278-225176, GALEX J202139.0-342547, Gaia DR3 6696646423047419264, EC 20184-3435
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 21 39.10 | 20 21 39.11 (0.03) | ||
| Declination | -34 25 47.46 | -34 25 46.24 (0.03) | ||
| Spectral type | He-sdO | sdO9.5VIHe28 | ||
| 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] | 0.80 (0.06) | 0.81 (0.04) | |
| Distance | [pc] | 1254.23 (102) | 1231.83 (65) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.396 (0.1) | -1.273 (0.04) | |
| Proper motion (declination) | [mas/yr] | -20.057 (0.07) | -19.975 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.18 | |||
| V magnitude | 14.46 | |||
| R magnitude | 14.66 (0.1) | |||
| I magnitude | ||||
| J magnitude | 15.03 (0.05) | 15.03 (0.05) | ||
| H magnitude | 14.93 (0.09) | 14.93 (0.09) | ||
| K magnitude | 15.28 (0.2) | 15.28 (0.2) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 14.39 (0.0009) | 14.37 (0.003) | ||
| BP magnitude | 14.16 (0.01) | |||
| RP magnitude | 14.65 (0.003) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.056 | |||
* 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.