All names: Gaia DR2 1334991769651067904, 2MASS J17154030+3422559, GALEX J171540.3+342255, UCAC4 622-054045, Gaia DR3 1334991769651067904, SDSSJ171540.30+342255.9, SDSS J171540.30+342255.8
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 15 40.30 | 17 15 40.31 (0.02) | ||
| Declination | 34 22 55.90 | 34 22 55.91 (0.02) | ||
| Spectral type | sdB+MS | sdB2.5He3+F/K | ||
| 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] | 0.29 (0.03) | 0.36 (0.03) | |
| Distance | [pc] | 3414.13 (394) | 2762.43 (199) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.073 (0.06) | -1.017 (0.03) | |
| Proper motion (declination) | [mas/yr] | 0.67 (0.06) | 0.642 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.59 (0.02) | |||
| V magnitude | 15.58 (0.07) | |||
| R magnitude | 15.74 (0.08) | |||
| I magnitude | ||||
| J magnitude | 15.01 (0.04) | 15.01 (0.04) | ||
| H magnitude | 14.76 (0.07) | 14.76 (0.07) | ||
| K magnitude | 14.83 (0.1) | 14.83 (0.1) | ||
| u magnitude | 15.79 (0.005) | 15.79 (0.005) | ||
| g magnitude | 15.51 (0.003) | 15.46 (0.01) | ||
| r magnitude | 15.57 (0.003) | 15.58 (0.05) | ||
| i magnitude | 15.63 (0.004) | 15.63 (0.004) | ||
| z magnitude | 15.72 (0.006) | 15.72 (0.006) | ||
| G magnitude | 15.50 (0.0006) | 15.49 (0.003) | ||
| BP magnitude | 15.55 (0.005) | |||
| RP magnitude | 15.31 (0.002) | |||
| Pan g magnitude | 15.55 (0.005) | |||
| Pan r magnitude | 15.60 (0.003) | |||
| Pan i magnitude | 15.65 (0.002) | |||
| Pan z magnitude | 15.74 (0.004) | |||
| Pan y magnitude | 15.76 (0.007) | |||
| E(B-V) | 0.025 | |||
* 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.