All names: 2MASS J21335797-4858030, EC 21306-4911, WISE J213357.98-485803.0, GALEX J213357.9-485802, TIC 139754135, Gaia DR3 6562925846101484544, Gaia EDR3 6562925846101484544, UCAC4 206-184866, EC21306-4911, Gaia DR2 6562925846101484544
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 33 57.97 (0.03) | 21 33 57.99 | 21 33 57.98 (0.03) | ||
| Declination | -48 58 02.99 (0.02) | -48 58 02.57 | -48 58 02.96 (0.02) | ||
| Spectral type | He-sdB | sdBC1VIIHe40 | |||
| 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] | 0.99 (0.04) | 0.77 (0.06) | 0.99 (0.04) | |
| Distance | [pc] | 1013.27 (39) | 1303.27 (98) | 1013.27 (39) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -5.164 (0.03) | -5.303 (0.08) | -5.164 (0.03) | |
| Proper motion (declination) | [mas/yr] | -2.306 (0.03) | -2.465 (0.09) | -2.306 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.94 (0.03) | ||||
| V magnitude | 15.13 (0.01) | ||||
| R magnitude | 15.42 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 15.73 (0.07) | 15.73 (0.07) | |||
| H magnitude | 15.96 (0.2) | 15.96 (0.2) | |||
| K magnitude | 15.54 | ||||
| u magnitude | |||||
| g magnitude | 14.92 (0.01) | ||||
| r magnitude | |||||
| i magnitude | 15.64 (0.01) | ||||
| z magnitude | |||||
| G magnitude | 15.11 (0.003) | 15.13 (0.0008) | 15.11 (0.003) | ||
| BP magnitude | 14.97 (0.003) | 14.89 (0.007) | |||
| RP magnitude | 15.39 (0.005) | 15.38 (0.003) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.015 | ||||
* 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.