All names: UCAC4 499-067702, GALEX J170436.4+094758, PG1702+099, SDSS J170436.52+094758.7, PG 1702+099, SDSS J170436.51+094758.7, Gaia DR3 4444499301127148032, TIC 323437969, 2MASS J17043651+0947587, Gaia DR2 4444499301127148032
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 04 36.52 | 17 04 36.52 (0.04) | ||
| Declination | 09 47 59.22 | 09 47 58.76 (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] | 0.61 (0.07) | 0.48 (0.05) | |
| Distance | [pc] | 1628.93 (195) | 2091.18 (223) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 2.706 (0.1) | 2.813 (0.05) | |
| Proper motion (declination) | [mas/yr] | -8.307 (0.1) | -8.009 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.68 (0.01) | |||
| V magnitude | 15.82 (0.08) | |||
| R magnitude | 15.94 (0.05) | |||
| I magnitude | ||||
| J magnitude | 16.07 (0.1) | 16.07 (0.1) | ||
| H magnitude | 16.71 | |||
| K magnitude | 15.91 | |||
| u magnitude | 15.34 (0.004) | |||
| g magnitude | 15.56 (0.003) | |||
| r magnitude | 16.03 (0.003) | |||
| i magnitude | 16.32 (0.004) | |||
| z magnitude | 16.63 (0.009) | |||
| G magnitude | 15.82 (0.001) | 15.80 (0.003) | ||
| BP magnitude | 15.62 (0.01) | |||
| RP magnitude | 16.02 (0.004) | |||
| Pan g magnitude | 15.66 (0.004) | |||
| Pan r magnitude | 16.04 (0.002) | |||
| Pan i magnitude | 16.36 (0.003) | |||
| Pan z magnitude | 16.60 (0.004) | |||
| Pan y magnitude | 16.79 (0.01) | |||
| E(B-V) | 0.094 | |||
* 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.