All names: PG 1704+441, FBS B 378, SDSS J170626.94+440255.2, GALEX J170626.9+440255, SDSS J170626.95+440255.1, Gaia DR3 1355440864860926848, Gaia DR2 1355440864860926848, 2MASS J17062694+4402553, FBS 1704+441, UCAC4 671-061819, TIC 198587982, PG1704+441
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 06 26.98 | 17 06 26.95 (0.02) | ||
| Declination | 44 02 55.46 | 44 02 55.24 (0.03) | ||
| Spectral type | sdB | sdB | ||
| 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] | 0.25 (0.04) | 0.35 (0.03) | |
| Distance | [pc] | 3927.73 (633) | 2873.56 (244) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.842 (0.07) | -2.833 (0.03) | |
| Proper motion (declination) | [mas/yr] | -5.47 (0.07) | -5.36 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.08 (0.05) | |||
| V magnitude | 15.93 (0.02) | |||
| R magnitude | 16.23 (0.3) | |||
| I magnitude | ||||
| J magnitude | 15.44 (0.06) | 15.44 (0.06) | ||
| H magnitude | 15.27 (0.1) | 15.27 (0.1) | ||
| K magnitude | 15.05 (0.1) | 15.05 (0.1) | ||
| u magnitude | 15.93 (0.006) | |||
| g magnitude | 15.84 (0.004) | 15.93 (0.01) | ||
| r magnitude | 15.94 (0.004) | 15.92 (0.01) | ||
| i magnitude | 15.99 (0.005) | 16.18 (0.01) | ||
| z magnitude | 16.08 (0.007) | |||
| G magnitude | 15.84 (0.0009) | 15.82 (0.003) | ||
| BP magnitude | 15.87 (0.006) | |||
| RP magnitude | 15.67 (0.004) | |||
| Pan g magnitude | 15.89 (0.002) | |||
| Pan r magnitude | 15.94 (0.002) | |||
| Pan i magnitude | 16.00 (0.002) | |||
| Pan z magnitude | 16.10 (0.002) | |||
| Pan y magnitude | 16.12 (0.003) | |||
| E(B-V) | 0.026 | |||
* 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.