All names: SDSSJ181027.90+415413.9, SDSS J181027.90+415413.9, LAMOST J181027.83+415413.5, Gaia EDR3 2113506200378734848, Gaia DR2 2113506200378734848, SDSS J181027.90+415413.6, 2MASS J18102790+4154139, Gaia DR3 2113506200378734848, UCAC4 660-064453, GALEX J181027.8+415413
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 10 27.90 (0.03) | 18 10 27.90 | 18 10 27.90 (0.03) | ||
| Declination | 41 54 13.59 (0.03) | 41 54 13.68 | 41 54 13.69 (0.03) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 27577.0 (290) | |||
| log(g) | [cgs] | 5.36 (0.04) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.49 (0.04) | 0.37 (0.05) | 0.49 (0.04) | |
| Distance | [pc] | 2032.52 (148) | 2703.43 (373) | 2032.52 (148) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -1.934 (0.05) | -1.906 (0.1) | -1.934 (0.05) | |
| Proper motion (declination) | [mas/yr] | -6.049 (0.05) | -5.851 (0.1) | -6.049 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.80 (0.03) | ||||
| V magnitude | 16.15 (0.08) | ||||
| R magnitude | 16.22 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 16.59 (0.1) | 16.59 (0.1) | |||
| H magnitude | 17.27 | ||||
| K magnitude | 16.63 | ||||
| u magnitude | 15.80 (0.005) | 15.80 (0.005) | |||
| g magnitude | 15.89 (0.004) | 15.82 (0.01) | |||
| r magnitude | 16.34 (0.004) | 16.45 (0.01) | |||
| i magnitude | 16.64 (0.005) | 16.64 (0.005) | |||
| z magnitude | 16.94 (0.01) | 16.94 (0.01) | |||
| G magnitude | 16.13 (0.003) | 16.15 (0.002) | 16.13 (0.003) | ||
| BP magnitude | 16.02 (0.004) | 15.97 (0.005) | |||
| RP magnitude | 16.36 (0.005) | 16.35 (0.004) | |||
| Pan g magnitude | 15.97 (0.002) | ||||
| Pan r magnitude | 16.36 (0.004) | ||||
| Pan i magnitude | 16.68 (0.002) | ||||
| Pan z magnitude | 16.93 (0.005) | ||||
| Pan y magnitude | 17.12 (0.01) | ||||
| E(B-V) | 0.033 | ||||
* 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.