All names: UCAC4 240-180906, EC21284-4214, GALEX J213139.5-420048, EC 21284-4214, Gaia DR3 6578803240683589888, Gaia DR2 6578803240683589888, TIC 147199754, 2MASS J21313961-4200485
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 31 39.65 | 21 31 39.62 (0.03) | ||
| Declination | -42 00 48.49 | -42 00 48.63 (0.02) | ||
| Spectral type | sdB+F | sdB+F | ||
| 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] | 0.26 (0.08) | 0.41 (0.04) | |
| Distance | [pc] | 3834.36 (1153) | 2420.14 (216) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 10.648 (0.09) | 10.754 (0.03) | |
| Proper motion (declination) | [mas/yr] | -2.422 (0.08) | -2.928 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.98 (0.06) | |||
| V magnitude | 15.91 (0.08) | |||
| R magnitude | 16.09 (0.3) | |||
| I magnitude | ||||
| J magnitude | 15.39 (0.05) | 15.39 (0.05) | ||
| H magnitude | 15.17 (0.06) | 15.17 (0.06) | ||
| K magnitude | 15.08 (0.1) | 15.08 (0.1) | ||
| u magnitude | ||||
| g magnitude | 15.88 (0.01) | |||
| r magnitude | 15.90 (0.01) | |||
| i magnitude | 16.17 (0.01) | |||
| z magnitude | ||||
| G magnitude | 15.81 (0.0005) | 15.80 (0.003) | ||
| BP magnitude | 15.79 (0.005) | |||
| RP magnitude | 15.68 (0.003) | |||
| 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.