All names: HS2216+1833, 2MASS J22183059+1848088, HS 2216+1833, Gaia DR2 1777173805417611776, TIC 258991819, UCAC4 545-144711, GALEX J221830.6+184808, UCAC2 38540913, SDSS J221830.58+184808.6, LAMOST J221830.58+184808.8, Gaia DR3 1777173805417611776
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 18 30.61 | 22 18 30.59 (0.04) | ||
| Declination | 18 48 09.74 | 18 48 08.82 (0.03) | ||
| Spectral type | sdB+MS | sdB+G1 | ||
| Effective temperature | [K] | 34361.0 (0) | ||
| log(g) | [cgs] | 5.51 (0) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.19 (0.04) | 1.20 (0.04) | |
| Distance | [pc] | 843.74 (29) | 835.98 (28) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -11.919 (0.06) | -12.523 (0.04) | |
| Proper motion (declination) | [mas/yr] | -23.361 (0.05) | -23.668 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.96 (0.02) | |||
| V magnitude | 13.90 (0.04) | |||
| R magnitude | 13.94 (0.1) | |||
| I magnitude | ||||
| J magnitude | 13.32 (0.03) | 13.32 (0.03) | ||
| H magnitude | 13.03 (0.05) | 13.03 (0.05) | ||
| K magnitude | 13.00 (0.04) | 13.00 (0.04) | ||
| u magnitude | 13.86 (0.003) | 13.86 (0.003) | ||
| g magnitude | 13.82 (0.003) | 13.82 (0.003) | ||
| r magnitude | 13.92 (0.003) | 13.92 (0.003) | ||
| i magnitude | 13.97 (0.003) | 13.97 (0.003) | ||
| z magnitude | 14.02 (0.004) | 14.02 (0.004) | ||
| G magnitude | 13.86 (0.001) | 13.84 (0.003) | ||
| BP magnitude | 13.87 (0.01) | |||
| RP magnitude | 13.69 (0.005) | |||
| Pan g magnitude | 13.87 (0.004) | |||
| Pan r magnitude | 13.94 (0.003) | |||
| Pan i magnitude | 14.00 (0.002) | |||
| Pan z magnitude | 14.05 (0.002) | |||
| Pan y magnitude | 14.09 (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.