All names: UCAC4 207-181731, Gaia DR2 6479094853352042624, TIC 79327772, GALEX J211750.0-483910, Gaia DR3 6479094853352042624, EC21144-4851, EC 21144-4851, 2MASS J21175019-4839113, Gaia EDR3 6479094853352042624
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 17 50.21 (0.03) | 21 17 50.25 | 21 17 50.20 (0.03) | ||
| Declination | -48 39 11.47 (0.03) | -48 39 11.02 | -48 39 11.41 (0.03) | ||
| 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] | 0.54 (0.04) | 0.52 (0.06) | 0.54 (0.04) | |
| Distance | [pc] | 1850.82 (134) | 1922.71 (214) | 1850.82 (134) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 7.201 (0.03) | 7.218 (0.08) | 7.201 (0.03) | |
| Proper motion (declination) | [mas/yr] | -3.968 (0.03) | -3.871 (0.08) | -3.968 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.39 (0.04) | ||||
| V magnitude | 15.55 (0.03) | ||||
| R magnitude | 16.00 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 16.10 (0.09) | 16.10 (0.09) | |||
| H magnitude | 16.20 (0.2) | 16.20 (0.2) | |||
| K magnitude | 16.81 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | 15.85 (0.03) | ||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 15.56 (0.003) | 15.57 (0.0007) | 15.56 (0.003) | ||
| BP magnitude | 15.41 (0.003) | 15.35 (0.008) | |||
| RP magnitude | 15.84 (0.005) | 15.83 (0.004) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.017 | ||||
* 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.