All names: TIC 21858882, GALEX J170812.1+353901, PG1706+357, SDSS J170812.08+353901.0, SDSS J170812.07+353901.1, PG 1706+357, FBS 1706+357, FBS B 594, Gaia DR3 1338462275026502400, 2MASS J17081207+3539011, Gaia DR2 1338462275026502400
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 08 12.07 | 17 08 12.08 (0.02) | ||
| Declination | 35 39 01.60 | 35 39 01.22 (0.03) | ||
| Spectral type | sdOB | sdBO | ||
| 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] | 0.48 (0.04) | 0.36 (0.03) | |
| Distance | [pc] | 2080.30 (187) | 2802.69 (228) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 4.025 (0.08) | 4.115 (0.03) | |
| Proper motion (declination) | [mas/yr] | -8.014 (0.08) | -8.1 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.53 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.24 (0.04) | 15.24 (0.04) | ||
| H magnitude | 14.94 (0.07) | 14.94 (0.07) | ||
| K magnitude | 14.83 (0.09) | 14.83 (0.09) | ||
| u magnitude | 15.11 (0.004) | 15.09 (0.004) | ||
| g magnitude | 15.27 (0.003) | 15.28 (0.003) | ||
| r magnitude | 15.59 (0.004) | 15.65 (0.004) | ||
| i magnitude | 15.74 (0.004) | 15.81 (0.004) | ||
| z magnitude | 15.87 (0.006) | 15.96 (0.007) | ||
| G magnitude | 15.43 (0.0009) | 15.41 (0.003) | ||
| BP magnitude | 15.32 (0.007) | |||
| RP magnitude | 15.44 (0.002) | |||
| Pan g magnitude | 15.36 (0.003) | |||
| Pan r magnitude | 15.64 (0.004) | |||
| Pan i magnitude | 15.80 (0.002) | |||
| Pan z magnitude | 15.93 (0.003) | |||
| Pan y magnitude | 15.99 (0.008) | |||
| E(B-V) | 0.024 | |||
* 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.