All names: Gaia EDR3 4517173927356186368, GALEX J185733.0+174029, Gaia DR2 4517173343239949952, SDSSJ185733.07+174029.0, Gaia DR3 4517173343239949952, SDSS J185733.07+174029.0
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 57 34.10 (0.5) | 18 57 33.08 | 18 57 33.08 (0.05) | ||
| Declination | 17 41 53.69 (0.6) | 17 40 29.00 | 17 40 28.97 (0.05) | ||
| Spectral type | sd | sd+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] | 2.45 (0.9) | 0.27 (0.09) | 0.32 (0.07) | |
| Distance | [pc] | 407.76 (145) | 3695.49 (1235) | 3147.62 (720) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.563 (0.8) | -4.332 (0.1) | -4.312 (0.06) | |
| Proper motion (declination) | [mas/yr] | -9.294 (1) | -4.597 (0.2) | -4.89 (0.06) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 14.63 (0.04) | ||||
| H magnitude | 14.22 (0.04) | ||||
| K magnitude | 14.12 (0.08) | ||||
| u magnitude | 16.49 (0.009) | ||||
| g magnitude | 16.17 (0.004) | ||||
| r magnitude | 16.04 (0.004) | ||||
| i magnitude | 16.01 (0.005) | ||||
| z magnitude | 15.75 (0.01) | ||||
| G magnitude | 20.58 (0.008) | 17.01 (0.001) | 16.98 (0.003) | ||
| BP magnitude | 20.90 (0.1) | 16.96 (0.007) | |||
| RP magnitude | 19.97 (0.05) | 16.88 (0.009) | |||
| Pan g magnitude | 17.02 (0.003) | ||||
| Pan r magnitude | 17.10 (0.003) | ||||
| Pan i magnitude | 17.24 (0.005) | ||||
| Pan z magnitude | 17.34 (0.001) | ||||
| Pan y magnitude | 17.45 (0.01) | ||||
| E(B-V) | 0.428 | ||||
* 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.