All names: 2MASS J20474237-0542310, SDSS J204742.37-054231.0, Gaia DR2 6913470047324213376, SDSSJ204742.37-054231.0, Gaia DR3 6913470047324213376, GALEX J204742.3-054230, SDSS J204742.37-054231.1, TIC 248295870
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 47 42.38 | 20 47 42.38 (0.02) | ||
| Declination | -05 42 31.11 | -05 42 31.06 (0.01) | ||
| Spectral type | sd | sd+F/K | ||
| 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] | 0.60 (0.04) | 0.52 (0.03) | |
| Distance | [pc] | 1675.32 (122) | 1939.11 (108) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 5.302 (0.07) | 5.298 (0.03) | |
| Proper motion (declination) | [mas/yr] | -5.53 (0.04) | -5.636 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.21 (0.03) | 14.21 (0.03) | ||
| H magnitude | 14.04 (0.04) | 14.04 (0.04) | ||
| K magnitude | 13.90 (0.05) | 13.90 (0.05) | ||
| u magnitude | 15.29 (0.005) | 15.29 (0.02) | ||
| g magnitude | 14.98 (0.004) | 14.98 (0.01) | ||
| r magnitude | 14.89 (0.004) | 14.89 (0.009) | ||
| i magnitude | 14.88 (0.004) | 14.89 (0.008) | ||
| z magnitude | 14.91 (0.005) | 14.89 (0.01) | ||
| G magnitude | 14.84 (0.0004) | 14.83 (0.003) | ||
| BP magnitude | 14.95 (0.003) | |||
| RP magnitude | 14.56 (0.002) | |||
| Pan g magnitude | 14.99 (0.004) | |||
| Pan r magnitude | 14.90 (0.002) | |||
| Pan i magnitude | 14.90 (0.002) | |||
| Pan z magnitude | 14.95 (0.003) | |||
| Pan y magnitude | 14.97 (0.005) | |||
| E(B-V) | 0.043 | |||
* 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.