All names: FBS1804+439, GALEX J180542.0+435907, SDSS J180542.06+435907.6, Gaia DR3 2114337293729638528, TIC 198614726, Gaia DR2 2114337293729638528, 2MASS J18054206+4359076, FBS 1804+439, FBS B 391
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 05 42.10 | 18 05 42.07 (0.02) | ||
| Declination | 43 59 07.80 | 43 59 07.64 (0.02) | ||
| Spectral type | sdB | sdB | ||
| 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] | 0.39 (0.03) | 0.33 (0.02) | |
| Distance | [pc] | 2551.67 (213) | 2991.33 (160) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -6.428 (0.07) | -6.418 (0.02) | |
| Proper motion (declination) | [mas/yr] | -2.314 (0.06) | -2.211 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.49 (0.03) | 14.49 (0.03) | ||
| H magnitude | 14.49 (0.07) | 14.49 (0.07) | ||
| K magnitude | 14.68 (0.1) | 14.68 (0.1) | ||
| u magnitude | 14.62 (0.004) | 14.64 (0.02) | ||
| g magnitude | 14.11 (0.003) | 14.16 (0.01) | ||
| r magnitude | 14.42 (0.004) | 14.44 (0.01) | ||
| i magnitude | 14.66 (0.004) | 14.67 (0.01) | ||
| z magnitude | 14.88 (0.005) | 14.89 (0.02) | ||
| G magnitude | 14.30 (0.0005) | 14.28 (0.003) | ||
| BP magnitude | 14.22 (0.003) | |||
| RP magnitude | 14.34 (0.003) | |||
| Pan g magnitude | 14.17 (0.004) | |||
| Pan r magnitude | 14.45 (0.002) | |||
| Pan i magnitude | 14.70 (0.002) | |||
| Pan z magnitude | 14.88 (0.004) | |||
| Pan y magnitude | 14.95 (0.002) | |||
| E(B-V) | 0.032 | |||
* 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.