All names: Gaia DR2 3987771173198563840, SDSSJ103913.48+205746.8, UCAC4 555-048292, GALEX J103913.5+205746, 2MASS J10391350+2057468, Gaia DR3 3987771173198563840, SDSS J103913.48+205746.8
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 10 39 13.48 | 10 39 13.49 (0.04) | ||
| Declination | 20 57 46.80 | 20 57 46.91 (0.04) | ||
| Spectral type | sdB+MS | 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] | 0.36 (0.1) | 0.31 (0.05) | |
| Distance | [pc] | 2766.25 (935) | 3181.67 (502) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.827 (0.2) | -1.909 (0.04) | |
| Proper motion (declination) | [mas/yr] | -10.414 (0.2) | -10.404 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.23 (0.06) | |||
| V magnitude | ||||
| R magnitude | 16.14 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.57 (0.05) | 15.57 (0.05) | ||
| H magnitude | 15.32 (0.08) | 15.32 (0.08) | ||
| K magnitude | 15.27 (0.1) | 15.27 (0.1) | ||
| u magnitude | 16.85 (0.008) | 16.85 (0.008) | ||
| g magnitude | 16.14 (0.004) | 16.11 (0.01) | ||
| r magnitude | 16.13 (0.004) | 16.16 (0.01) | ||
| i magnitude | 16.15 (0.004) | 16.15 (0.004) | ||
| z magnitude | 16.21 (0.008) | 16.21 (0.008) | ||
| G magnitude | 16.08 (0.001) | 16.07 (0.003) | ||
| BP magnitude | 16.19 (0.004) | |||
| RP magnitude | 15.84 (0.004) | |||
| Pan g magnitude | 16.15 (0.004) | |||
| Pan r magnitude | 16.14 (0.003) | |||
| Pan i magnitude | 16.19 (0.005) | |||
| Pan z magnitude | 16.25 (0.005) | |||
| Pan y magnitude | 16.27 (0.004) | |||
| E(B-V) | 0.020 | |||
* 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.