All names: GALEX J202815.1-150212, SDSS J202815.22-150213.1, 2MASS J20281523-1502135, Gaia DR2 6875218759351073664, Gaia EDR3 6875219029931164544, SDSSJ202815.22-150213.1, TIC 429110119, Gaia DR3 6875218759351073664
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 28 08.10 (0.2) | 20 28 15.23 | 20 28 15.23 (0.05) | ||
| Declination | -15 01 17.36 (0.1) | -15 02 13.15 | -15 02 13.22 (0.03) | ||
| Spectral type | sd | sd | |||
| 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] | 4.02 (0.2) | 0.44 (0.09) | 0.44 (0.05) | |
| Distance | [pc] | 248.99 (12) | 2281.54 (454) | 2262.96 (272) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 2.249 (0.2) | -2.869 (0.2) | -2.851 (0.05) | |
| Proper motion (declination) | [mas/yr] | -1.507 (0.1) | 4.05 (0.09) | 4.05 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.50 (0.1) | 16.50 (0.1) | |||
| H magnitude | 16.79 | ||||
| K magnitude | 15.96 | ||||
| u magnitude | 15.80 (0.005) | 15.81 (0.01) | |||
| g magnitude | 15.80 (0.004) | 15.83 (0.01) | |||
| r magnitude | 16.23 (0.005) | 16.23 (0.009) | |||
| i magnitude | 16.51 (0.005) | 16.50 (0.01) | |||
| z magnitude | 16.75 (0.01) | 16.74 (0.02) | |||
| G magnitude | 18.63 (0.003) | 16.05 (0.002) | 16.02 (0.003) | ||
| BP magnitude | 18.66 (0.02) | 15.88 (0.006) | |||
| RP magnitude | 18.61 (0.03) | 16.21 (0.006) | |||
| Pan g magnitude | 15.89 (0.006) | ||||
| Pan r magnitude | 16.24 (0.003) | ||||
| Pan i magnitude | 16.54 (0.004) | ||||
| Pan z magnitude | 16.79 (0.003) | ||||
| Pan y magnitude | 16.92 (0.01) | ||||
| E(B-V) | 0.068 | ||||
* 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.