All names: Gaia DR3 1416603466898656384, TIC 298552263, SDSS J174025.94+524307.4, Gaia EDR3 1416603466898656384, WISE J174025.90+524307.1, HS1739+5244, WISEA J174025.90+524307.1, UCAC4 714-056285, GALEX J174025.9+524306, Gaia DR2 1416603466898656384, 2MASS J17402594+5243073, HS 1739+5244
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 40 25.94 (0.03) | 17 40 25.93 | 17 40 25.94 (0.03) | ||
| Declination | 52 43 07.38 (0.03) | 52 43 07.88 | 52 43 07.51 (0.03) | ||
| Spectral type | sdOB | sdB | |||
| Effective temperature | [K] | 36000.0 (900) | |||
| log(g) | [cgs] | 5.50 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.56 (0.03) | 0.59 (0.04) | 0.56 (0.03) | |
| Distance | [pc] | 1782.85 (100) | 1708.23 (118) | 1782.85 (100) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -0.899 (0.04) | -0.906 (0.1) | -0.899 (0.04) | |
| Proper motion (declination) | [mas/yr] | -8.315 (0.04) | -8.362 (0.08) | -8.315 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.82 (0.04) | ||||
| V magnitude | 15.25 (0.06) | ||||
| R magnitude | 15.72 (0.05) | ||||
| I magnitude | |||||
| J magnitude | 15.82 (0.07) | 15.82 (0.07) | |||
| H magnitude | 15.63 (0.1) | 15.63 (0.1) | |||
| K magnitude | 15.78 | ||||
| u magnitude | 14.59 (0.004) | 14.59 (0.02) | |||
| g magnitude | 14.89 (0.003) | 14.92 (0.02) | |||
| r magnitude | 15.40 (0.004) | 15.39 (0.01) | |||
| i magnitude | 15.75 (0.004) | 15.73 (0.02) | |||
| z magnitude | 16.09 (0.008) | 16.09 (0.02) | |||
| G magnitude | 15.16 (0.003) | 15.17 (0.0009) | 15.16 (0.003) | ||
| BP magnitude | 15.01 (0.004) | 14.96 (0.009) | |||
| RP magnitude | 15.46 (0.005) | 15.45 (0.004) | |||
| Pan g magnitude | 14.99 (0.003) | ||||
| Pan r magnitude | 15.43 (0.003) | ||||
| Pan i magnitude | 15.78 (0.002) | ||||
| Pan z magnitude | 16.06 (0.004) | ||||
| Pan y magnitude | 16.25 (0.005) | ||||
| E(B-V) | 0.030 | ||||
* 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.