All names: 2MASS J21285250-5341320, GALEX J212852.5-534131, EC21253-5354, UCAC4 182-215545, Gaia DR3 6464997018339777664, Gaia DR2 6464997018339777664, EC 21253-5354
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 28 52.48 | 21 28 52.51 (0.03) | ||
| Declination | -53 41 32.39 | -53 41 32.06 (0.03) | ||
| 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] | 0.20 (0.06) | 0.25 (0.04) | |
| Distance | [pc] | 4962.78 (1522) | 3947.89 (672) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 0.785 (0.09) | 0.678 (0.04) | |
| Proper motion (declination) | [mas/yr] | -7.257 (0.09) | -7.222 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.33 | |||
| V magnitude | 16.15 | |||
| R magnitude | 16.13 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.80 (0.1) | 15.80 (0.1) | ||
| H magnitude | 15.77 (0.2) | 15.77 (0.2) | ||
| K magnitude | 15.34 (0.2) | 15.34 (0.2) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.20 (0.0009) | 16.18 (0.003) | ||
| BP magnitude | 16.24 (0.005) | |||
| RP magnitude | 15.99 (0.004) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.016 | |||
* 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.