All names: EC 20404-4456, EC20404-4456, GALEX J204352.0-444607, TIC 1990504388, TIC 471015402, Gaia DR3 6675139013535264256, Gaia DR2 6675139013535264256, Gaia EDR3 6675138631281346432
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Simbad |
|---|---|---|---|---|
| Right ascension | 20 43 50.56 (0.5) | 20 43 52.02 | 20 43 52.07 (0.04) | |
| Declination | -44 47 06.17 (0.4) | -44 46 07.39 | -44 46 07.50 (0.04) | |
| 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] | 1.91 (0.7) | -0.04 (0.08) | 0.07 (0.06) |
| Distance | [pc] | 524.74 (189) | 15151.52 (14509) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 9.818 (0.6) | -4.805 (0.1) | -4.814 (0.06) |
| Proper motion (declination) | [mas/yr] | -17.041 (0.6) | -4.088 (0.1) | -4.147 (0.05) |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.87 | |||
| V magnitude | 16.18 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 20.14 (0.006) | 16.12 (0.002) | 16.09 (0.003) | |
| BP magnitude | 20.07 (0.06) | 15.81 (0.02) | ||
| RP magnitude | 20.34 (0.1) | 16.42 (0.006) | ||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | ||||
* 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.