All names: PG1659+123, 2MASS J17020614+1216076, LB 984, TIC 142010815, Gaia DR2 4448078069740611712, Gaia DR3 4448078069740611712, GALEX J170206.2+121608, PG 1659+123, SDSS J170206.14+121607.8
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 02 06.16 | 17 02 06.14 (0.04) | ||
| Declination | 12 16 08.14 | 12 16 07.85 (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] | 0.45 (0.07) | 0.50 (0.05) | |
| Distance | [pc] | 2203.13 (326) | 1997.20 (214) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -5.981 (0.1) | -6.04 (0.06) | |
| Proper motion (declination) | [mas/yr] | -3.841 (0.1) | -3.824 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.91 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.63 (0.2) | 16.63 (0.2) | ||
| H magnitude | 16.82 | |||
| K magnitude | 17.01 | |||
| u magnitude | 15.76 (0.005) | 15.77 (0.02) | ||
| g magnitude | 16.06 (0.004) | 16.05 (0.01) | ||
| r magnitude | 16.51 (0.004) | 16.52 (0.01) | ||
| i magnitude | 16.84 (0.006) | 16.85 (0.01) | ||
| z magnitude | 17.13 (0.01) | 17.14 (0.02) | ||
| G magnitude | 16.28 (0.001) | 16.26 (0.003) | ||
| BP magnitude | 16.07 (0.008) | |||
| RP magnitude | 16.51 (0.006) | |||
| Pan g magnitude | 16.09 (0.003) | |||
| Pan r magnitude | 16.50 (0.003) | |||
| Pan i magnitude | 16.85 (0.002) | |||
| Pan z magnitude | 17.11 (0.002) | |||
| Pan y magnitude | 17.29 (0.01) | |||
| E(B-V) | 0.067 | |||
* 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.