All names: CHSS 1861, SDSSJ111808.66+180823.1, Pul -3 770290, GALEX J111808.6+180822, TIC 3803622, SDSS J111808.65+180823.0, 2MASS J11180867+1808232, GPM 169.536095+18.139905, Gaia DR2 3971809837776084224, Gaia DR3 3971809837776084224, SDSS J111808.66+180823.0
| Parameter | Unit | Geier 2020 | Simbad |
|---|---|---|---|
| Right ascension | 11 18 08.66 | 11 18 08.66 (0.04) | |
| Declination | 18 08 23.10 | 18 08 23.11 (0.03) | |
| 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] | -0.05 (0.1) | 0.03 (0.05) |
| Distance | [pc] | 35460.99 (58473) | |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | -3.314 (0.1) | -3.104 (0.04) |
| Proper motion (declination) | [mas/yr] | -4.229 (0.1) | -4.335 (0.04) |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | 15.30 | ||
| V magnitude | 15.40 | ||
| R magnitude | |||
| I magnitude | |||
| J magnitude | 15.50 (0.06) | 15.50 (0.06) | |
| H magnitude | 15.56 (0.1) | 15.56 (0.1) | |
| K magnitude | 15.47 (0.2) | 15.47 (0.2) | |
| u magnitude | 15.40 (0.005) | 15.40 (0.005) | |
| g magnitude | 15.30 (0.004) | 15.30 (0.004) | |
| r magnitude | 15.63 (0.004) | 15.63 (0.004) | |
| i magnitude | 15.84 (0.005) | 15.84 (0.005) | |
| z magnitude | 16.03 (0.007) | 16.03 (0.007) | |
| G magnitude | 15.49 (0.002) | 15.46 (0.003) | |
| BP magnitude | 15.42 (0.01) | ||
| RP magnitude | 15.53 (0.006) | ||
| Pan g magnitude | 15.39 (0.003) | ||
| Pan r magnitude | 15.64 (0.003) | ||
| Pan i magnitude | 15.86 (0.003) | ||
| Pan z magnitude | 16.05 (0.001) | ||
| Pan y magnitude | 16.13 (0.005) | ||
| E(B-V) | |||
* 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.