All names: Gaia DR2 6809597976961734528, EC21450-2912, EC 21450-2912, Gaia DR3 6809597976961734528, TIC 53784680, GALEX J214757.7-285821, 2MASS J21475767-2858227
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 47 57.73 | 21 47 57.71 (0.05) | ||
| Declination | -28 58 21.86 | -28 58 22.30 (0.04) | ||
| 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] | 0.11 (0.08) | 0.11 (0.08) | |
| Distance | [pc] | 9242.14 (7004) | 9242.14 (7004) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.525 (0.1) | -2.494 (0.06) | |
| Proper motion (declination) | [mas/yr] | -2.877 (0.1) | -3.108 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.70 (0.1) | 16.70 (0.1) | ||
| H magnitude | 16.50 (0.3) | 16.50 (0.3) | ||
| K magnitude | 16.90 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.53 (0.001) | 16.51 (0.003) | ||
| BP magnitude | 16.41 (0.009) | |||
| RP magnitude | 16.61 (0.01) | |||
| Pan g magnitude | 16.42 (0.004) | |||
| Pan r magnitude | 16.70 (0.004) | |||
| Pan i magnitude | 16.96 (0.004) | |||
| Pan z magnitude | 17.15 (0.005) | |||
| Pan y magnitude | 17.26 (0.02) | |||
| E(B-V) | 0.025 | |||
* 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.