All names: Gaia DR2 1817266534856772096, GALEXJ20392+2013, TIC 243520386, Gaia DR3 1817266534856772096, 2MASS J20391327+2013076, Gaia EDR3 1817266534856772096, UCAC4 552-122142, GALEX J203913.4+201309
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 39 13.26 (0.03) | 20 39 13.42 | 20 39 13.28 (0.03) | ||
| Declination | 20 13 07.49 (0.03) | 20 13 09.15 | 20 13 07.70 (0.03) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 30600.0 (270) | |||
| log(g) | [cgs] | 5.52 (0.08) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.70 (0.04) | 1.64 (0.07) | 1.70 (0.04) | |
| Distance | [pc] | 587.20 (14) | 609.09 (28) | 587.20 (14) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -16.159 (0.04) | -16.019 (0.1) | -16.159 (0.04) | |
| Proper motion (declination) | [mas/yr] | -13.333 (0.04) | -13.286 (0.1) | -13.333 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | 12.64 | ||||
| R magnitude | 13.24 (0.09) | ||||
| I magnitude | |||||
| J magnitude | 13.59 (0.03) | 13.59 (0.03) | |||
| H magnitude | 13.70 (0.04) | 13.70 (0.04) | |||
| K magnitude | 13.84 (0.05) | 13.84 (0.05) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 12.96 (0.003) | 12.99 (0.001) | 12.96 (0.003) | ||
| BP magnitude | 12.83 (0.003) | 12.78 (0.006) | |||
| RP magnitude | 13.23 (0.004) | 13.23 (0.001) | |||
| Pan g magnitude | |||||
| Pan r magnitude | 18.06 (0.2) | ||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.035 | ||||
* 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.