All names: UCAC2 45876780, Gaia DR3 2064522751202948992, 2MASS J20423391+4005416, TIC 274192238, SBC9 3345, UCAC3 261-203291, Gaia DR2 2064522751202948992, KPD2040+3955, UCAC4 651-092784, KPD 2040+3955
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 42 33.97 | 20 42 33.93 (0.01) | ||
| Declination | 40 05 42.47 | 40 05 41.60 (0.02) | ||
| Spectral type | sdB+WD | sdB | ||
| Effective temperature | [K] | 27900.0 | ||
| log(g) | [cgs] | 5.54 | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.25 (0.04) | 1.19 (0.02) | |
| Distance | [pc] | 799.62 (26) | 839.56 (14) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -12.12 (0.06) | -12.061 (0.02) | |
| Proper motion (declination) | [mas/yr] | -13.987 (0.07) | -13.913 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.34 (0.02) | |||
| V magnitude | 14.48 (0.03) | |||
| R magnitude | 14.59 (0.06) | |||
| I magnitude | ||||
| J magnitude | 14.56 (0.04) | 14.56 (0.04) | ||
| H magnitude | 14.56 (0.07) | 14.56 (0.07) | ||
| K magnitude | 14.58 (0.09) | 14.58 (0.09) | ||
| u magnitude | 14.38 (0.003) | |||
| g magnitude | 14.30 (0.003) | |||
| r magnitude | 14.54 (0.003) | |||
| i magnitude | 14.77 (0.004) | |||
| z magnitude | 14.97 (0.005) | |||
| G magnitude | 14.44 (0.0004) | 14.43 (0.003) | ||
| BP magnitude | 14.38 (0.004) | |||
| RP magnitude | 14.46 (0.001) | |||
| Pan g magnitude | 14.39 (0.001) | |||
| Pan r magnitude | 14.57 (0.001) | |||
| Pan i magnitude | 14.80 (0.003) | |||
| Pan z magnitude | 14.98 (0.003) | |||
| Pan y magnitude | 15.09 (0.004) | |||
| E(B-V) | 0.361 | |||
* 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.