All names: GALEX J211742.2-000619, 2MASS J21174222-0006198, Gaia DR2 2689440797710883584, SDSSJ211742.22-000619.9, TIC 364189322, UCAC4 450-132148, SDSS J211742.22-000619.9, Gaia DR3 2689440797710883584
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 17 42.22 | 21 17 42.22 (0.04) | ||
| Declination | -00 06 19.98 | -00 06 19.95 (0.03) | ||
| Spectral type | sdB+MS | sdOB+F7V | ||
| 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] | 0.19 (0.09) | 0.37 (0.05) | |
| Distance | [pc] | 5227.39 (2588) | 2699.06 (360) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 2.17 (0.1) | 1.997 (0.05) | |
| Proper motion (declination) | [mas/yr] | -1.395 (0.09) | -1.514 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.41 (0.04) | |||
| V magnitude | 15.13 (0.03) | |||
| R magnitude | 15.18 (0.08) | |||
| I magnitude | ||||
| J magnitude | 14.32 (0.03) | 14.32 (0.03) | ||
| H magnitude | 14.15 (0.05) | 14.15 (0.05) | ||
| K magnitude | 14.08 (0.07) | 14.08 (0.07) | ||
| u magnitude | 15.55 (0.005) | 15.55 (0.005) | ||
| g magnitude | 15.15 (0.004) | 15.22 (0.04) | ||
| r magnitude | 15.05 (0.005) | 15.10 (0.03) | ||
| i magnitude | 15.04 (0.005) | 15.08 (0.02) | ||
| z magnitude | 15.07 (0.006) | 15.07 (0.006) | ||
| G magnitude | 15.03 (0.0007) | 15.02 (0.003) | ||
| BP magnitude | 15.17 (0.004) | |||
| RP magnitude | 14.74 (0.005) | |||
| Pan g magnitude | 15.18 (0.003) | |||
| Pan r magnitude | 15.07 (0.002) | |||
| Pan i magnitude | 15.08 (0.002) | |||
| Pan z magnitude | 15.11 (0.0004) | |||
| Pan y magnitude | 15.12 (0.007) | |||
| E(B-V) | 0.038 | |||
* 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.