All names: Gaia DR2 909317797165729024, UCAC4 650-047581, PG 0815+405, 2MASS J08185658+3954057, KUV 08156+4004, PG0815+405, LAMOST J081856.59+395405.7, FBS 0815+405, SDSS J081856.59+395405.8, TIC 18765101, WISE J081856.61+395406.0, Gaia DR3 909317797165729024, FBS B 52
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 08 18 56.60 | 08 18 56.59 (0.03) | ||
| Declination | 39 54 05.75 | 39 54 05.80 (0.03) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 22910.0 (210) | ||
| log(g) | [cgs] | 5.44 (0.07) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.98 (0.06) | 0.87 (0.04) | |
| Distance | [pc] | 1018.23 (62) | 1147.58 (54) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 10.325 (0.09) | 10.398 (0.04) | |
| Proper motion (declination) | [mas/yr] | -5.678 (0.06) | -5.8 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.71 (0.01) | |||
| V magnitude | 14.93 (0.05) | |||
| R magnitude | 15.25 (0.1) | |||
| I magnitude | ||||
| J magnitude | 15.30 (0.05) | 15.30 (0.05) | ||
| H magnitude | 15.49 (0.1) | 15.49 (0.1) | ||
| K magnitude | 15.69 (0.2) | 15.69 (0.2) | ||
| u magnitude | 14.77 (0.004) | 14.78 (0.01) | ||
| g magnitude | 14.68 (0.003) | 14.66 (0.02) | ||
| r magnitude | 15.11 (0.003) | 15.16 (0.02) | ||
| i magnitude | 15.41 (0.004) | 15.39 (0.1) | ||
| z magnitude | 15.68 (0.006) | 15.67 (0.02) | ||
| G magnitude | 14.94 (0.0005) | 14.92 (0.003) | ||
| BP magnitude | 14.78 (0.005) | |||
| RP magnitude | 15.09 (0.003) | |||
| Pan g magnitude | 14.78 (0.002) | |||
| Pan r magnitude | 15.12 (0.002) | |||
| Pan i magnitude | 15.42 (0.002) | |||
| Pan z magnitude | 15.67 (0.003) | |||
| Pan y magnitude | 15.79 (0.01) | |||
| E(B-V) | 0.037 | |||
* 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.