All names: Gaia DR2 3281870929912521984, HS0444+0458, UCAC4 476-008059, HS 0444+0458, TIC 457196370, Gaia DR3 3281870929912521984, Gaia EDR3 3281870929912521984, 2MASS J04471860+0503345, V* V1636 Ori
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 04 47 18.63 (0.04) | 04 47 18.61 | 04 47 18.63 (0.04) | ||
| Declination | 05 03 34.79 (0.02) | 05 03 34.84 | 05 03 34.81 (0.02) | ||
| Spectral type | sdBV | sdB | |||
| Effective temperature | [K] | 33800.0 (800) | |||
| log(g) | [cgs] | 5.60 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.61 (0.05) | 0.66 (0.07) | 0.61 (0.05) | |
| Distance | [pc] | 1648.53 (131) | 1518.37 (166) | 1648.53 (131) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 1.275 (0.05) | 1.188 (0.1) | 1.275 (0.05) | |
| Proper motion (declination) | [mas/yr] | -1.443 (0.04) | -1.162 (0.09) | -1.443 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.44 (0.04) | ||||
| V magnitude | 15.53 (0.06) | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.14 (0.1) | 16.14 (0.1) | |||
| H magnitude | 16.10 | ||||
| K magnitude | 15.91 (0.3) | 15.91 (0.3) | |||
| u magnitude | |||||
| g magnitude | 15.41 (0.01) | ||||
| r magnitude | 15.83 (0.03) | ||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 15.61 (0.003) | 15.62 (0.001) | 15.61 (0.003) | ||
| BP magnitude | 15.47 (0.004) | 15.42 (0.01) | |||
| RP magnitude | 15.86 (0.005) | 15.85 (0.005) | |||
| Pan g magnitude | 15.46 (0.006) | ||||
| Pan r magnitude | 15.85 (0.003) | ||||
| Pan i magnitude | 16.19 (0.005) | ||||
| Pan z magnitude | 16.46 (0.006) | ||||
| Pan y magnitude | 16.64 (0.005) | ||||
| E(B-V) | 0.092 | ||||
* 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.