All names: UCAC4 308-270995, Gaia DR2 6798551497173711744, GALEX J203407.2-283409, Gaia EDR3 6798551497173711744, 2MASS J20340727-2834105, EC 20310-2844, EC20310-2844, TIC 212252799, Gaia DR3 6798551497173711744
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 34 07.29 (0.04) | 20 34 07.30 | 20 34 07.29 (0.04) | ||
| Declination | -28 34 10.76 (0.03) | -28 34 09.77 | -28 34 10.66 (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] | 0.46 (0.05) | 0.50 (0.07) | 0.46 (0.05) | |
| Distance | [pc] | 2184.36 (226) | 1997.20 (297) | 2184.36 (226) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 1.879 (0.05) | 1.883 (0.1) | 1.879 (0.05) | |
| Proper motion (declination) | [mas/yr] | -5.942 (0.04) | -6.04 (0.08) | -5.942 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.64 | ||||
| V magnitude | 15.80 | ||||
| R magnitude | 16.02 (0.3) | ||||
| I magnitude | |||||
| J magnitude | 16.53 (0.1) | 16.53 (0.1) | |||
| H magnitude | 15.97 | ||||
| K magnitude | 16.86 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 15.85 (0.003) | 15.86 (0.0008) | 15.85 (0.003) | ||
| BP magnitude | 15.71 (0.003) | 15.64 (0.004) | |||
| RP magnitude | 16.13 (0.005) | 16.12 (0.003) | |||
| Pan g magnitude | 15.70 (0.004) | ||||
| Pan r magnitude | 16.11 (0.003) | ||||
| Pan i magnitude | 16.45 (0.002) | ||||
| Pan z magnitude | 16.72 (0.004) | ||||
| Pan y magnitude | 16.90 (0.009) | ||||
| E(B-V) | 0.051 | ||||
* 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.