All names: PG1708+409, PG 1708+409, FBS B 150, 2MASS J17095918+4054502, SDSS J170959.18+405450.1, TIC 85407360, UCAC2 45996771, GALEX J170959.2+405449, FBS 1708+409, UCAC4 655-060647, Gaia DR2 1353948655783762816, Gaia DR3 1353948655783762816, LAMOST J170959.18+405450.1
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 09 59.24 | 17 09 59.19 (0.03) | ||
| Declination | 40 54 50.15 | 40 54 50.05 (0.03) | ||
| Spectral type | sdB | sdB+? | ||
| Effective temperature | [K] | 28500.0 (1000) | ||
| log(g) | [cgs] | 5.33 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.64 (0.04) | 0.60 (0.03) | |
| Distance | [pc] | 1564.95 (91) | 1667.78 (86) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -13.872 (0.07) | -13.701 (0.03) | |
| Proper motion (declination) | [mas/yr] | -4.193 (0.08) | -4.667 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.16 (0.08) | |||
| V magnitude | 15.22 (0.08) | |||
| R magnitude | 15.58 (0.2) | |||
| I magnitude | ||||
| J magnitude | 14.97 (0.04) | 14.97 (0.04) | ||
| H magnitude | 14.69 (0.06) | 14.69 (0.06) | ||
| K magnitude | 14.68 (0.09) | 14.68 (0.09) | ||
| u magnitude | 15.06 (0.004) | 15.06 (0.004) | ||
| g magnitude | 15.01 (0.004) | 15.01 (0.004) | ||
| r magnitude | 15.28 (0.004) | 15.28 (0.004) | ||
| i magnitude | 15.42 (0.004) | 15.42 (0.004) | ||
| z magnitude | 15.56 (0.006) | 15.56 (0.006) | ||
| G magnitude | 15.15 (0.0008) | 15.14 (0.003) | ||
| BP magnitude | 15.09 (0.006) | |||
| RP magnitude | 15.13 (0.003) | |||
| Pan g magnitude | 15.09 (0.002) | |||
| Pan r magnitude | 15.30 (0.001) | |||
| Pan i magnitude | 15.47 (0.001) | |||
| Pan z magnitude | 15.59 (0.005) | |||
| Pan y magnitude | 15.64 (0.006) | |||
| E(B-V) | 0.027 | |||
* 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.