All names: UCAC2 24486818, UCAC4 355-194257, TIC 71841866, Gaia DR2 6860561685237891584, Gaia DR3 6860561685237891584, 2MASS J20202606-1901502, WISE J202026.05-190150.3, WISEA J202026.05-190150.5, GALEXJ20204-1901, GALEX J202026.0-190150, DENIS J202026.0-190150
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 20 26.09 | 20 20 26.06 (0.04) | ||
| Declination | -19 01 50.55 | -19 01 50.32 (0.03) | ||
| Spectral type | He-sdOB | sdBN0VIHe35 | ||
| 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] | 0.66 (0.06) | 0.73 (0.04) | |
| Distance | [pc] | 1518.14 (129) | 1366.31 (83) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.363 (0.09) | -2.599 (0.04) | |
| Proper motion (declination) | [mas/yr] | -11.916 (0.06) | -12.024 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.32 (0.04) | |||
| V magnitude | 14.45 (0.05) | |||
| R magnitude | 14.66 (0.2) | |||
| I magnitude | 14.63 (0.03) | |||
| J magnitude | 14.96 (0.03) | 14.96 (0.03) | ||
| H magnitude | 15.12 (0.07) | 15.12 (0.07) | ||
| K magnitude | 15.23 (0.1) | 15.23 (0.1) | ||
| u magnitude | ||||
| g magnitude | 14.27 (0.01) | |||
| r magnitude | 14.71 (0.03) | |||
| i magnitude | 15.11 (0.01) | |||
| z magnitude | ||||
| G magnitude | 14.44 (0.0005) | 14.43 (0.003) | ||
| BP magnitude | 14.22 (0.007) | |||
| RP magnitude | 14.66 (0.002) | |||
| Pan g magnitude | 14.31 (0.003) | |||
| Pan r magnitude | 14.66 (0.001) | |||
| Pan i magnitude | 15.01 (0.002) | |||
| Pan z magnitude | 15.26 (0.003) | |||
| Pan y magnitude | 15.44 (0.004) | |||
| E(B-V) | 0.097 | |||
* 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.