All names: EC 20040-6411, UCAC4 130-176146, EC20040-6411, TIC 466196631, 2MASS J20083502-6402289, Gaia DR2 6430124873195906304, GALEX J200834.8-640228, Gaia DR3 6430124873195906304
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 08 35.11 | 20 08 35.05 (0.03) | ||
| Declination | -64 02 27.96 | -64 02 28.78 (0.03) | ||
| Spectral type | He-sdO | sdOHe | ||
| 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] | 0.47 (0.07) | 0.45 (0.05) | |
| Distance | [pc] | 2139.50 (312) | 2212.39 (227) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.72 (0.09) | -2.71 (0.04) | |
| Proper motion (declination) | [mas/yr] | -1.326 (0.09) | -1.459 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.94 | |||
| V magnitude | 16.12 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.71 (0.1) | 16.71 (0.1) | ||
| H magnitude | 16.35 | |||
| K magnitude | 15.04 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.08 (0.001) | 16.06 (0.003) | ||
| BP magnitude | 15.85 (0.005) | |||
| RP magnitude | 16.33 (0.002) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.040 | |||
* 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.