All names: Gaia DR3 4512523061897877760, SDSSJ184556.50+185239.6, Gaia EDR3 4512522683945293312, Gaia DR2 4512523061897877760, GALEX J184556.4+185240, SDSS J184556.50+185239.6
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 45 52.88 (0.3) | 18 45 56.50 | 18 45 56.50 (0.03) | ||
| Declination | 18 52 11.53 (0.3) | 18 52 39.62 | 18 52 39.69 (0.04) | ||
| Spectral type | sd | sd+G/K | |||
| 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] | 2.31 (0.6) | 0.32 (0.07) | 0.42 (0.07) | |
| Distance | [pc] | 433.75 (103) | 3141.69 (737) | 2383.79 (379) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -1.925 (0.4) | 0.343 (0.1) | 0.537 (0.05) | |
| Proper motion (declination) | [mas/yr] | -7.069 (0.5) | -10.806 (0.2) | -10.778 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.97 (0.08) | ||||
| H magnitude | 15.54 (0.1) | ||||
| K magnitude | 15.71 (0.2) | ||||
| u magnitude | 17.51 (0.01) | 17.51 (0.01) | |||
| g magnitude | 17.16 (0.004) | 17.16 (0.004) | |||
| r magnitude | 17.07 (0.005) | 17.07 (0.005) | |||
| i magnitude | 16.98 (0.005) | 16.98 (0.005) | |||
| z magnitude | 16.92 (0.01) | 16.92 (0.01) | |||
| G magnitude | 20.37 (0.005) | 17.01 (0.0007) | 17.00 (0.003) | ||
| BP magnitude | 20.94 (0.1) | 17.18 (0.005) | |||
| RP magnitude | 19.73 (0.1) | 16.66 (0.004) | |||
| Pan g magnitude | 17.21 (0.004) | ||||
| Pan r magnitude | 17.07 (0.005) | ||||
| Pan i magnitude | 17.01 (0.007) | ||||
| Pan z magnitude | 16.98 (0.006) | ||||
| Pan y magnitude | 16.93 (0.01) | ||||
| E(B-V) | 0.234 | ||||
* 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.