All names: GALEX J184559.8-413827, UCAC4 242-166000, GALEX J184559.8-413826, Gaia DR3 6716376055399759360, UCAC2 14082035, TIC 253656464, 2MASS J18455986-4138279, Gaia DR2 6716376055399759360, GALEXJ18459-4138
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 45 59.88 | 18 45 59.86 (0.03) | ||
| Declination | -41 38 26.87 | -41 38 28.04 (0.03) | ||
| Spectral type | He-sdB | sdBN2VHe38 | ||
| Effective temperature | [K] | 35930.0 (4770) | ||
| log(g) | [cgs] | 5.23 (0.3) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.29 (0.06) | 0.15 (0.04) | |
| Distance | [pc] | 3490.40 (788) | 6811.99 (1759) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 0.271 (0.1) | 0.243 (0.04) | |
| Proper motion (declination) | [mas/yr] | -0.104 (0.09) | 0.102 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.49 (0.01) | |||
| V magnitude | 14.60 (0.03) | |||
| R magnitude | 14.91 (0.07) | |||
| I magnitude | ||||
| J magnitude | 15.05 (0.04) | 15.05 (0.04) | ||
| H magnitude | 15.09 (0.07) | 15.09 (0.07) | ||
| K magnitude | 15.15 (0.1) | 15.15 (0.1) | ||
| u magnitude | ||||
| g magnitude | 14.43 (0.01) | |||
| r magnitude | 14.80 (0.01) | |||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 14.59 (0.001) | 14.57 (0.003) | ||
| BP magnitude | 14.40 (0.008) | |||
| RP magnitude | 14.74 (0.004) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.085 | |||
* 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.