All names: UCAC4 352-182213, EC 20302-1949, Gaia DR3 6859761240771134080, 2MASS J20330693-1939168, EC20302-1949, GALEX J203306.8-193916, Gaia EDR3 6859761343850351616, Gaia DR2 6859761240771134080
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 33 05.30 (0.5) | 20 33 06.90 | 20 33 06.92 (0.04) | ||
| Declination | -19 38 25.87 (0.3) | -19 39 15.98 | -19 39 16.66 (0.03) | ||
| Spectral type | sdB | 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] | 1.09 (0.6) | 0.62 (0.08) | 0.45 (0.05) | |
| Distance | [pc] | 918.70 (497) | 1615.77 (209) | 2247.19 (247) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.879 (0.5) | 4.714 (0.1) | 4.913 (0.05) | |
| Proper motion (declination) | [mas/yr] | -9.276 (0.4) | -8.102 (0.08) | -8.023 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.61 | ||||
| V magnitude | 15.82 | ||||
| R magnitude | 16.02 (0.3) | ||||
| I magnitude | |||||
| J magnitude | 16.24 (0.1) | 16.24 (0.1) | |||
| H magnitude | 16.12 (0.2) | 16.12 (0.2) | |||
| K magnitude | 15.55 | ||||
| u magnitude | 15.52 (0.005) | ||||
| g magnitude | 15.56 (0.003) | ||||
| r magnitude | 15.94 (0.004) | ||||
| i magnitude | 16.25 (0.004) | ||||
| z magnitude | 16.51 (0.01) | ||||
| G magnitude | 19.75 (0.004) | 15.79 (0.0008) | 15.77 (0.003) | ||
| BP magnitude | 20.01 (0.06) | 15.61 (0.005) | |||
| RP magnitude | 19.28 (0.05) | 15.95 (0.003) | |||
| Pan g magnitude | 15.64 (0.002) | ||||
| Pan r magnitude | 15.99 (0.003) | ||||
| Pan i magnitude | 16.30 (0.002) | ||||
| Pan z magnitude | 16.54 (0.005) | ||||
| Pan y magnitude | 16.68 (0.009) | ||||
| E(B-V) | 0.056 | ||||
* 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.