All names: Gaia DR2 1438423824907522688, 2MASS J17084063+6117466, HS 1707+6121, PG1708+614, SDSS J170840.61+611746.5, PG 1708+614, FBS 1708+614, TIC 307984782, GALEX J170840.5+611746, FBS B 750, Gaia DR3 1438423824907522688
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 08 40.66 | 17 08 40.61 (0.03) | ||
| Declination | 61 17 45.97 | 61 17 46.50 (0.04) | ||
| Spectral type | He-sdO | sdOC | ||
| Effective temperature | [K] | 46000.0 | ||
| log(g) | [cgs] | 5.70 | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.43 (0.04) | 0.40 (0.03) | |
| Distance | [pc] | 2324.50 (205) | 2507.52 (216) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -9.367 (0.07) | -9.085 (0.04) | |
| Proper motion (declination) | [mas/yr] | 10.116 (0.09) | 10.212 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | 14.40 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.88 (0.08) | 15.88 (0.08) | ||
| H magnitude | 16.51 (0.3) | 16.51 (0.3) | ||
| K magnitude | 15.88 (0.2) | 15.88 (0.2) | ||
| u magnitude | 14.34 (0.003) | 14.27 (0.008) | ||
| g magnitude | 14.81 (0.003) | 14.77 (0.02) | ||
| r magnitude | 15.31 (0.004) | 15.29 (0.01) | ||
| i magnitude | 15.65 (0.004) | 15.65 (0.02) | ||
| z magnitude | 15.99 (0.006) | 15.99 (0.02) | ||
| G magnitude | 15.06 (0.0009) | 15.05 (0.003) | ||
| BP magnitude | 14.81 (0.01) | |||
| RP magnitude | 15.36 (0.004) | |||
| Pan g magnitude | 14.89 (0.009) | |||
| Pan r magnitude | 15.33 (0.004) | |||
| Pan i magnitude | 15.70 (0.002) | |||
| Pan z magnitude | 15.99 (0.004) | |||
| Pan y magnitude | 16.18 (0.003) | |||
| 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.