All names: 2MASS J21085243-2434175, TIC 289823802, EC 21059-2446, GALEXJ21088-2434, UCAC4 328-203494, Gaia EDR3 6804012943225234432, Gaia DR2 6804012943225234432, GALEX J210852.3-243416, Gaia DR3 6804012943225234432
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 08 52.42 (0.04) | 21 08 52.37 | 21 08 52.42 (0.04) | ||
| Declination | -24 34 17.69 (0.03) | -24 34 16.19 | -24 34 17.48 (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] | 1.00 (0.05) | 0.98 (0.06) | 1.00 (0.05) | |
| Distance | [pc] | 999.00 (53) | 1015.43 (58) | 999.00 (53) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -1.647 (0.05) | -1.573 (0.08) | -1.647 (0.05) | |
| Proper motion (declination) | [mas/yr] | -13.152 (0.04) | -13.013 (0.07) | -13.152 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.30 (0.01) | ||||
| V magnitude | 14.35 (0.01) | ||||
| R magnitude | 14.93 (0.2) | ||||
| I magnitude | |||||
| J magnitude | 15.10 (0.04) | 15.10 (0.04) | |||
| H magnitude | 15.23 (0.07) | 15.23 (0.07) | |||
| K magnitude | 15.46 (0.2) | 15.46 (0.2) | |||
| u magnitude | |||||
| g magnitude | 14.27 (0.01) | ||||
| r magnitude | 14.64 (0.01) | ||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 14.48 (0.003) | 14.50 (0.0006) | 14.48 (0.003) | ||
| BP magnitude | 14.34 (0.004) | 14.28 (0.009) | |||
| RP magnitude | 14.74 (0.004) | 14.74 (0.001) | |||
| Pan g magnitude | 14.35 (0.005) | ||||
| Pan r magnitude | 14.74 (0.003) | ||||
| Pan i magnitude | 15.10 (0.001) | ||||
| Pan z magnitude | 15.35 (0.003) | ||||
| Pan y magnitude | 15.54 (0.004) | ||||
| E(B-V) | 0.045 | ||||
* 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.