All names: LAMOST J163952.81-010945.7, UCAC4 445-064725, SDSS J163952.80-010945.5, SDSSJ163952.80-010945.5, Gaia DR3 4382345695515446016, SDSS J163952.81-010945.7, GALEX J163952.8-010944, 2MASS J16395281-0109458, Gaia DR2 4382345695515446016
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 39 52.81 | 16 39 52.81 (0.02) | ||
| Declination | -01 09 45.74 | -01 09 45.81 (0.01) | ||
| Spectral type | sd | sdB/sdO | ||
| 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] | 0.01 (0.04) | 0.07 (0.02) | |
| Distance | [pc] | 131578.95 (709834) | 15128.59 (4417) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.776 (0.08) | -0.628 (0.02) | |
| Proper motion (declination) | [mas/yr] | -6.161 (0.05) | -6.0 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.24 (0.03) | |||
| V magnitude | 13.33 (0.02) | |||
| R magnitude | 13.54 (0.08) | |||
| I magnitude | ||||
| J magnitude | 13.43 (0.03) | 13.43 (0.03) | ||
| H magnitude | 13.48 (0.02) | 13.48 (0.02) | ||
| K magnitude | 13.49 (0.04) | 13.49 (0.04) | ||
| u magnitude | 14.22 (0.005) | 14.22 (0.005) | ||
| g magnitude | 13.17 (0.03) | |||
| r magnitude | 13.59 (0.002) | 13.52 (0.01) | ||
| i magnitude | 14.42 (0.006) | 13.67 (0.06) | ||
| z magnitude | 14.16 (0.005) | 14.16 (0.005) | ||
| G magnitude | 13.31 (0.0004) | 13.29 (0.003) | ||
| BP magnitude | 13.21 (0.005) | |||
| RP magnitude | 13.33 (0.002) | |||
| Pan g magnitude | 13.27 | |||
| Pan r magnitude | 13.44 (0.003) | |||
| Pan i magnitude | 13.70 (0.002) | |||
| Pan z magnitude | 13.86 (0.002) | |||
| Pan y magnitude | 13.96 (0.005) | |||
| E(B-V) | 0.140 | |||
* 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.