All names: SDSS J171703.15+271637.02, LAMOST J171703.15+271636.9, Gaia DR2 4574334135261377152, LAMOST J171703.15+271637.0, Gaia EDR3 4574334135261377152, USNO-B1.0 1172-00328011, PG1715+273, PG 1715+273, GALEX J171703.1+271636, Gaia DR3 4574334135261377152, SDSS J171703.15+271637.0
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Guo et al. 2015 | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 17 03.15 (0.04) | 17 17 03.15 | 17 17 03.16 | 17 17 03.15 (0.04) | 17 17 03.15 (0.04) | |||||
| Declination | 27 16 36.93 (0.04) | 27 16 37.03 | 27 16 37.48 | 27 16 36.93 (0.05) | 27 16 37.01 (0.04) | |||||
| Spectral type | He-sdOB | DB | He-sdB | sdB1VIIHe35 | ||||||
| Effective temperature | [K] | 45818.0 (125) | ||||||||
| log(g) | [cgs] | 7.00 (0.05) | ||||||||
| Mass | [M☉] | |||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 0.37 (0.05) | 0.35 (0.06) | 0.35 (0.06) | 0.37 (0.05) | |||||
| Distance | [pc] | 2682.97 (384) | 2857.96 (525) | 2858.28 (526) | 2683.12 (384) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -1.818305039 (0.05) | -1.785 (0.1) | -1.784575314 (0.1) | -1.818 (0.05) | |||||
| Proper motion (declination) | [mas/yr] | -5.304583902 (0.05) | -5.206 (0.1) | -5.206277871 (0.1) | -5.305 (0.05) | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 16.60 | |||||||||
| V magnitude | ||||||||||
| R magnitude | 16.90 | |||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 16.43 (0.007) | 16.43 (0.007) | 16.43 (0.02) | 16.43 (0.007) | ||||||
| g magnitude | 16.69 (0.004) | 16.69 (0.004) | 16.71 (0.02) | 16.69 (0.004) | ||||||
| r magnitude | 17.15 (0.005) | 17.15 (0.005) | 17.15 (0.01) | 17.15 (0.005) | ||||||
| i magnitude | 17.48 (0.007) | 17.48 (0.007) | 17.48 (0.02) | 17.48 (0.007) | ||||||
| z magnitude | 17.78 (0.02) | 17.78 (0.02) | 17.78 (0.03) | 17.78 (0.02) | ||||||
| G magnitude | 16.92 (0.004) | 16.95 (0.002) | 16.95 | 16.92 (0.003) | ||||||
| BP magnitude | 16.80 (0.004) | 16.74 (0.01) | 16.74 | |||||||
| RP magnitude | 17.17 (0.008) | 17.16 (0.008) | 17.16 | |||||||
| Pan g magnitude | 16.76 (0.005) | 16.76 (0.005) | ||||||||
| Pan r magnitude | 17.16 (0.002) | 17.16 (0.002) | ||||||||
| Pan i magnitude | 17.51 (0.004) | 17.51 (0.004) | ||||||||
| Pan z magnitude | 17.76 (0.009) | 17.76 (0.009) | ||||||||
| Pan y magnitude | 17.97 (0.008) | 17.97 (0.008) | ||||||||
| 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.