All names: HS 1844+5048, GALEX J184555.8+505118, Gaia DR2 2144578158461485568, TIC 47974808, HS1844+5048, Gaia EDR3 2144578016725882112, Gaia DR3 2144578158461485568, 2MASS J18455575+5051189
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 45 54.29 (0.2) | 18 45 55.78 | 18 45 55.79 (0.03) | ||
| Declination | 50 49 26.23 (0.2) | 50 51 19.40 | 50 51 18.72 (0.04) | ||
| Spectral type | sdB+MS | ||||
| 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] | 2.24 (0.2) | 0.44 (0.04) | 0.31 (0.03) | |
| Distance | [pc] | 445.47 (37) | 2294.10 (234) | 3180.66 (343) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -6.583 (0.2) | -3.3 (0.09) | -3.16 (0.04) | |
| Proper motion (declination) | [mas/yr] | 17.347 (0.3) | -9.265 (0.1) | -9.075 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.25 (0.1) | 16.25 (0.1) | |||
| H magnitude | 15.97 (0.2) | 15.97 (0.2) | |||
| K magnitude | 17.09 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 19.51 (0.004) | 16.38 (0.001) | 16.35 (0.003) | ||
| BP magnitude | 19.52 (0.04) | 16.27 (0.009) | |||
| RP magnitude | 19.62 (0.07) | 16.36 (0.007) | |||
| Pan g magnitude | 16.32 (0.003) | ||||
| Pan r magnitude | 16.54 (0.003) | ||||
| Pan i magnitude | 16.70 (0.002) | ||||
| Pan z magnitude | 16.82 (0.004) | ||||
| Pan y magnitude | 16.90 (0.01) | ||||
| E(B-V) | 0.035 | ||||
* 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.