All names: Gaia DR2 6456781742335108992, UCAC4 162-208225, EC21004-5753, TIC 394484050, 2MASS J21041609-5741138, Gaia DR3 6456781742335108992, GALEX J210416.0-574113, EC 21004-5753
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 04 16.20 | 21 04 16.10 (0.02) | ||
| Declination | -57 41 13.81 | -57 41 13.91 (0.02) | ||
| 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] | 0.12 (0.05) | 0.22 (0.03) | |
| Distance | [pc] | 8354.22 (3441) | 4572.47 (656) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.115 (0.07) | -3.236 (0.03) | |
| Proper motion (declination) | [mas/yr] | -4.0 (0.07) | -4.173 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.50 (0.06) | |||
| V magnitude | 15.58 (0.03) | |||
| R magnitude | 15.78 (0.3) | |||
| I magnitude | ||||
| J magnitude | 15.74 (0.06) | 15.74 (0.06) | ||
| H magnitude | 15.51 (0.1) | 15.51 (0.1) | ||
| K magnitude | 15.86 | |||
| u magnitude | ||||
| g magnitude | 15.40 (0.01) | |||
| r magnitude | 15.79 (0.01) | |||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.56 (0.0005) | 15.54 (0.003) | ||
| BP magnitude | 15.47 (0.004) | |||
| RP magnitude | 15.61 (0.002) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| 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.