All names: TIC 219068316, [TFW97] J164653.49+310345.50, PG1644+311, BPS BS 16556-0092, PG 1644+312, Gaia DR3 1311664634035338240, Gaia DR2 1311664634035338240, GALEX J164653.4+310345, 2MASS J16465342+3103455, HIDDEN NAME PG 1644+311
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 46 53.45 | 16 46 53.43 (0.02) | ||
| Declination | 31 03 45.24 | 31 03 45.47 (0.02) | ||
| 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] | 0.34 (0.03) | 0.29 (0.02) | |
| Distance | [pc] | 2966.48 (284) | 3428.18 (247) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.146 (0.05) | -2.981 (0.02) | |
| Proper motion (declination) | [mas/yr] | 3.367 (0.07) | 3.429 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.57 (0.04) | 14.57 (0.04) | ||
| H magnitude | 14.48 (0.06) | 14.48 (0.06) | ||
| K magnitude | 14.77 (0.1) | 14.77 (0.1) | ||
| u magnitude | 14.39 (0.004) | |||
| g magnitude | 14.56 (0.008) | |||
| r magnitude | 14.45 (0.004) | |||
| i magnitude | 14.71 (0.005) | |||
| z magnitude | 14.95 (0.005) | |||
| G magnitude | 14.30 (0.0004) | 14.29 (0.003) | ||
| BP magnitude | 14.19 (0.004) | |||
| RP magnitude | 14.40 (0.001) | |||
| Pan g magnitude | 14.16 (0.004) | |||
| Pan r magnitude | 14.48 (0.003) | |||
| Pan i magnitude | 14.73 (0.003) | |||
| Pan z magnitude | 14.95 (0.006) | |||
| Pan y magnitude | 15.07 (0.001) | |||
| E(B-V) | 0.023 | |||
* 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.