All names: EC 20122-4502, GALEX J201544.5-445333, EC20122-4502, Gaia DR3 6672987986538599168, 2MASS J20154451-4453342, Gaia DR2 6672987986538599168, UCAC4 226-194331
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 15 44.55 | 20 15 44.58 (0.06) | ||
| Declination | -44 53 32.71 | -44 53 34.12 (0.05) | ||
| Spectral type | sdB | sdB | ||
| 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] | 0.05 (0.1) | 0.10 (0.07) | |
| Distance | [pc] | 20408.16 (50396) | 10162.60 (7219) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.346 (0.2) | -1.217 (0.07) | |
| Proper motion (declination) | [mas/yr] | -11.937 (0.1) | -12.097 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.25 (0.07) | |||
| V magnitude | 16.31 (0.01) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.70 (0.1) | 16.70 (0.1) | ||
| H magnitude | 16.05 | |||
| K magnitude | 15.12 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.52 (0.002) | 16.50 (0.003) | ||
| BP magnitude | 16.41 (0.01) | |||
| RP magnitude | 16.61 (0.005) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.026 | |||
* 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.