All names: 2MASS J17175847+6039211, HS 1717+6042, PG 1717+607, Gaia EDR3 1437454188795350912, TIC 232615474, SDSS J171758.50+603921.0, Gaia DR2 1437454188795350912, Gaia DR3 1437454188795350912, GALEX J171758.2+603920, PG1717+607
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 17 58.51 (0.02) | 17 17 58.49 | 17 17 58.50 (0.02) | ||
| Declination | 60 39 20.81 (0.03) | 60 39 21.80 | 60 39 21.05 (0.03) | ||
| Spectral type | sdB | sdBO | |||
| Effective temperature | [K] | 29600.0 (700) | |||
| log(g) | [cgs] | 5.50 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.00 (0.03) | 0.98 (0.03) | 1.00 (0.03) | |
| Distance | [pc] | 998.80 (26) | 1015.43 (35) | 998.80 (26) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 2.479 (0.03) | 2.376 (0.07) | 2.479 (0.03) | |
| Proper motion (declination) | [mas/yr] | -14.576 (0.04) | -14.55 (0.07) | -14.576 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.50 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 14.99 (0.04) | 14.99 (0.04) | |||
| H magnitude | 15.14 (0.1) | 15.14 (0.1) | |||
| K magnitude | 15.32 (0.2) | 15.32 (0.2) | |||
| u magnitude | 13.96 (0.003) | 13.97 (0.01) | |||
| g magnitude | 14.12 (0.003) | 14.15 (0.02) | |||
| r magnitude | 14.63 (0.003) | 14.63 (0.01) | |||
| i magnitude | 14.96 (0.003) | 14.97 (0.01) | |||
| z magnitude | 15.28 (0.005) | 15.29 (0.01) | |||
| G magnitude | 14.39 (0.003) | 14.40 (0.0006) | 14.39 (0.003) | ||
| BP magnitude | 14.25 (0.003) | 14.20 (0.005) | |||
| RP magnitude | 14.66 (0.004) | 14.66 (0.002) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | 19.19 (0.1) | ||||
| Pan z magnitude | |||||
| Pan y magnitude | 18.26 (0.06) | ||||
| E(B-V) | 0.024 | ||||
* 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.