All names: Gaia DR2 1412851314749838976, UCAC4 709-055559, SDSS J165412.49+513900.0, PG1652+517, PG 1652+517, SBSS 1652+517, WISE J165412.59+513859.5, GALEX J165412.5+513900, Gaia DR3 1412851314749838976
| Parameter | Unit | Geier 2020 | Simbad |
|---|---|---|---|
| Right ascension | 16 54 12.55 | 16 54 12.50 (0.04) | |
| Declination | 51 39 00.29 | 51 39 00.07 (0.04) | |
| 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] | -0.04 (0.06) | 0.07 (0.04) |
| Distance | [pc] | 14285.71 (8857) | |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | -1.638 (0.1) | -1.889 (0.05) |
| Proper motion (declination) | [mas/yr] | 0.771 (0.1) | 0.867 (0.06) |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | 15.92 (0.04) | ||
| V magnitude | 16.19 (0.08) | ||
| R magnitude | 16.31 (0.2) | ||
| I magnitude | |||
| J magnitude | |||
| H magnitude | |||
| K magnitude | |||
| u magnitude | 15.62 (0.005) | ||
| g magnitude | 15.90 (0.004) | 15.92 (0.03) | |
| r magnitude | 16.39 (0.004) | 16.29 (0.1) | |
| i magnitude | 16.74 (0.005) | 16.74 (0.01) | |
| z magnitude | 17.02 (0.01) | ||
| G magnitude | 16.18 (0.002) | 16.15 (0.003) | |
| BP magnitude | 15.95 (0.008) | ||
| RP magnitude | 16.42 (0.004) | ||
| Pan g magnitude | 15.99 (0.002) | ||
| Pan r magnitude | 16.41 (0.004) | ||
| Pan i magnitude | 16.76 (0.002) | ||
| Pan z magnitude | 17.02 (0.004) | ||
| Pan y magnitude | 17.23 (0.009) | ||
| E(B-V) | |||
* 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.