All names: LAMOST J171917.85+472220.9, UCAC4 687-059526, WISE J171917.88+472220.3, 2MASS J17191785+4722210, GALEX J171917.9+472220, TIC 459986307, Gaia DR2 1365071418489267584, PG 1717+474, WISEA J171917.85+472221.1, Gaia EDR3 1365071418489267584, Gaia DR3 1365071418489267584, PG1717+474
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 19 17.86 (0.04) | 17 19 17.86 | 17 19 17.86 (0.04) | ||
| Declination | 47 22 20.91 (0.04) | 47 22 21.17 | 47 22 20.97 (0.04) | ||
| Spectral type | sdOB | sdB | |||
| Effective temperature | [K] | 38620.0 (530) | |||
| log(g) | [cgs] | 5.87 (0.06) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.66 (0.04) | 0.55 (0.05) | 0.66 (0.04) | |
| Distance | [pc] | 1515.61 (88) | 1811.92 (176) | 1515.61 (88) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.17 (0.04) | -2.339 (0.1) | -2.17 (0.04) | |
| Proper motion (declination) | [mas/yr] | -3.662 (0.05) | -3.881 (0.1) | -3.662 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.61 (0.05) | ||||
| V magnitude | 15.91 (0.02) | ||||
| R magnitude | 15.95 (0.05) | ||||
| I magnitude | |||||
| J magnitude | 16.25 (0.1) | 16.25 (0.1) | |||
| H magnitude | 16.25 | ||||
| K magnitude | 17.25 | ||||
| u magnitude | |||||
| g magnitude | 15.59 (0) | ||||
| r magnitude | 16.05 (0.03) | ||||
| i magnitude | 16.71 (0.01) | ||||
| z magnitude | |||||
| G magnitude | 15.78 (0.003) | 15.79 (0.001) | 15.78 (0.003) | ||
| BP magnitude | 15.62 (0.004) | 15.55 (0.01) | |||
| RP magnitude | 16.07 (0.007) | 16.07 (0.006) | |||
| Pan g magnitude | 15.61 (0.006) | ||||
| Pan r magnitude | 16.04 (0.004) | ||||
| Pan i magnitude | 16.42 (0.002) | ||||
| Pan z magnitude | 16.71 (0.005) | ||||
| Pan y magnitude | 16.88 (0.007) | ||||
| E(B-V) | 0.029 | ||||
* 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.