All names: Gaia EDR3 1638944818481870848, TIC 219091835, GALEX J175610.0+705629, HS1756+7056, Gaia DR3 1638944818481870848, UCAC4 805-025825, 2MASS J17560994+7056314, Gaia DR2 1638944818481870848, HS 1756+7056
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 56 09.93 (0.03) | 17 56 10.06 | 17 56 09.96 (0.03) | ||
| Declination | 70 56 31.07 (0.04) | 70 56 31.54 | 70 56 31.22 (0.04) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 29500.0 (1000) | |||
| log(g) | [cgs] | 5.70 (0.2) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.51 (0.04) | 0.41 (0.05) | 0.51 (0.04) | |
| Distance | [pc] | 1965.80 (159) | 2460.63 (293) | 1965.80 (159) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -9.777 (0.04) | -9.628 (0.07) | -9.777 (0.04) | |
| Proper motion (declination) | [mas/yr] | -9.766 (0.05) | -9.627 (0.1) | -9.766 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.61 (0.06) | ||||
| V magnitude | 15.71 (0.03) | ||||
| R magnitude | 15.05 (0.4) | ||||
| I magnitude | |||||
| J magnitude | 16.47 (0.1) | 16.47 (0.1) | |||
| H magnitude | 15.99 | ||||
| K magnitude | 16.08 | ||||
| u magnitude | |||||
| g magnitude | 15.62 (0.04) | ||||
| r magnitude | 15.87 (0.07) | ||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 15.77 (0.003) | 15.79 (0.001) | 15.77 (0.003) | ||
| BP magnitude | 15.64 (0.004) | 15.60 (0.008) | |||
| RP magnitude | 16.02 (0.005) | 16.01 (0.003) | |||
| Pan g magnitude | 15.63 (0.008) | ||||
| Pan r magnitude | 16.01 (0.002) | ||||
| Pan i magnitude | 16.35 (0.003) | ||||
| Pan z magnitude | 16.63 (0.007) | ||||
| Pan y magnitude | 16.82 (0.009) | ||||
| E(B-V) | 0.032 | ||||
* 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.