All names: LAMOST J164437.16-000005.5, UCAC2 31704881, UCAC4 450-063260, GALEXJ16446-0000, GALEX J164437.2-000003, WISE J164437.16-000005.5, Gaia DR3 4382904797178453504, 2MASS J16443717-0000055, WISEA J164437.16-000005.5, Gaia DR2 4382904797178453504
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 44 37.22 | 16 44 37.16 (0.02) | ||
| Declination | -00 00 03.64 | -00 00 05.55 (0.01) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 26430.0 (290) | ||
| log(g) | [cgs] | 5.51 (0.04) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.50 (0.05) | 1.43 (0.02) | |
| Distance | [pc] | 668.00 (21) | 699.89 (12) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 4.499 (0.09) | 4.54 (0.03) | |
| Proper motion (declination) | [mas/yr] | 5.151 (0.06) | 5.204 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.54 (0.02) | |||
| V magnitude | 13.65 (0.06) | |||
| R magnitude | 13.89 (0.1) | |||
| I magnitude | ||||
| J magnitude | 13.92 (0.03) | 13.92 (0.03) | ||
| H magnitude | 14.00 (0.04) | 14.00 (0.04) | ||
| K magnitude | 14.09 (0.06) | 14.09 (0.06) | ||
| u magnitude | ||||
| g magnitude | 13.49 (0.01) | |||
| r magnitude | 13.81 (0.05) | |||
| i magnitude | 14.02 (0.05) | |||
| z magnitude | ||||
| G magnitude | 13.66 (0.0005) | 13.64 (0.003) | ||
| BP magnitude | 13.53 (0.007) | |||
| RP magnitude | 13.75 (0.002) | |||
| Pan g magnitude | 13.46 | |||
| Pan r magnitude | 13.83 (0.002) | |||
| Pan i magnitude | 14.09 (0.005) | |||
| Pan z magnitude | 14.30 (0.003) | |||
| Pan y magnitude | 14.43 (0.003) | |||
| E(B-V) | 0.119 | |||
* 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.