All names: Gaia EDR3 910825369342312320, NSVS 4819428, TIC 99091407, PG 0839+399, Gaia DR3 910825369342312320, UCAC4 649-046825, PG0839+399, FBS 0839+399, 2MASS J08431271+3944498, SDSS J084312.70+394449.7, GALEX J084312.8+394449, FBS B 55, KUV 345-30, Gaia DR2 910825369342312320, KUV 08399+3956
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 08 43 12.71 (0.03) | 08 43 12.70 | 08 43 12.71 (0.03) | ||
| Declination | 39 44 49.70 (0.02) | 39 44 50.11 | 39 44 49.81 (0.02) | ||
| Spectral type | sdB+WD | sdB | |||
| Effective temperature | [K] | 37800.0 (900) | |||
| log(g) | [cgs] | 5.53 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.89 (0.04) | 0.83 (0.06) | 0.89 (0.04) | |
| Distance | [pc] | 1124.73 (51) | 1198.32 (88) | 1124.73 (51) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 2.229 (0.04) | 2.199 (0.08) | 2.229 (0.04) | |
| Proper motion (declination) | [mas/yr] | -6.743 (0.03) | -6.834 (0.06) | -6.743 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.04 (0.002) | ||||
| V magnitude | 14.32 (0.003) | ||||
| R magnitude | 14.45 (0.001) | ||||
| I magnitude | 14.59 (0.009) | ||||
| J magnitude | 14.88 (0.04) | 14.88 (0.04) | |||
| H magnitude | 15.08 (0.06) | 15.08 (0.06) | |||
| K magnitude | 15.01 (0.1) | 15.01 (0.1) | |||
| u magnitude | 13.71 (0.003) | 13.71 (0.01) | |||
| g magnitude | 13.99 (0.003) | 13.99 (0.02) | |||
| r magnitude | 14.51 (0.003) | 14.51 (0.01) | |||
| i magnitude | 14.88 (0.004) | 14.88 (0.01) | |||
| z magnitude | 15.19 (0.005) | 15.20 (0.02) | |||
| G magnitude | 14.28 (0.003) | 14.29 (0.0005) | 14.28 (0.003) | ||
| BP magnitude | 14.12 (0.003) | 14.06 (0.01) | |||
| RP magnitude | 14.56 (0.004) | 14.56 (0.003) | |||
| Pan g magnitude | 14.12 (0.004) | ||||
| Pan r magnitude | 14.54 (0.003) | ||||
| Pan i magnitude | 14.90 (0.002) | ||||
| Pan z magnitude | 15.18 (0.003) | ||||
| Pan y magnitude | 15.37 (0.003) | ||||
| E(B-V) | 0.028 | ||||
* 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.