All names: TIC 471013628, EC 21515-2844, TIC 2028224084, Gaia DR3 6617824427315385984, Gaia EDR3 6617824427315385984, Gaia DR2 6617824427315385984, EC21515-2844, UCAC4 308-275219
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 54 24.05 (0.05) | 21 54 24.07 | 21 54 24.05 (0.05) | ||
| Declination | -28 30 28.93 (0.04) | -28 30 28.66 | -28 30 28.90 (0.04) | ||
| Spectral type | sdB | sdB/sdOB? | |||
| 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] | 0.50 (0.06) | 0.41 (0.09) | 0.50 (0.06) | |
| Distance | [pc] | 2006.42 (233) | 2452.78 (537) | 2006.42 (233) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.185 (0.06) | -2.012 (0.1) | -2.185 (0.06) | |
| Proper motion (declination) | [mas/yr] | -1.525 (0.05) | -1.44 (0.1) | -1.525 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.71 (0.04) | ||||
| V magnitude | 16.05 (0.01) | ||||
| R magnitude | 16.24 (0.2) | ||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | |||||
| g magnitude | 15.77 (0.01) | ||||
| r magnitude | 16.27 (0.01) | ||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 15.99 (0.003) | 16.01 (0.002) | 15.99 (0.003) | ||
| BP magnitude | 15.82 (0.004) | 15.75 (0.01) | |||
| RP magnitude | 16.32 (0.005) | 16.33 (0.006) | |||
| Pan g magnitude | 15.83 (0.004) | ||||
| Pan r magnitude | 16.29 (0.002) | ||||
| Pan i magnitude | 16.65 (0.002) | ||||
| Pan z magnitude | 16.95 (0.002) | ||||
| Pan y magnitude | 17.13 (0.01) | ||||
| E(B-V) | 0.020 | ||||
* 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.