All names: Gaia DR3 4492802221326659456, UCAC4 507-066407, LAMOSTJ173906.41+111748.1, WISEA J173906.40+111747.9, LAMOST J173906.41+111748.1, TIC 277744202, WISE J173906.40+111748.0, Gaia EDR3 4492802221326659456, Gaia DR2 4492802221326659456, 2MASS J17390640+1117481
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 39 06.41 (0.02) | 17 39 06.42 | 17 39 06.42 (0.02) | ||
| Declination | 11 17 47.90 (0.02) | 11 17 48.16 | 11 17 48.19 (0.02) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 27719.0 (154) | |||
| log(g) | [cgs] | 5.36 (0.02) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.72 (0.03) | 1.78 (0.05) | 1.72 (0.03) | |
| Distance | [pc] | 583.02 (11) | 562.78 (16) | 583.02 (11) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.994 (0.03) | -5.005 (0.07) | -4.994 (0.03) | |
| Proper motion (declination) | [mas/yr] | -18.505 (0.03) | -18.571 (0.07) | -18.505 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.19 (0.1) | ||||
| V magnitude | 13.35 (0.08) | ||||
| R magnitude | 13.51 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 13.79 (0.03) | 13.79 (0.03) | |||
| H magnitude | 13.93 (0.04) | 13.93 (0.04) | |||
| K magnitude | 13.93 (0.05) | 13.93 (0.05) | |||
| u magnitude | |||||
| g magnitude | 13.13 (0.05) | ||||
| r magnitude | 13.55 (0.08) | ||||
| i magnitude | 13.83 (0.01) | ||||
| z magnitude | |||||
| G magnitude | 13.28 (0.003) | 13.30 (0.0005) | 13.28 (0.003) | ||
| BP magnitude | 13.18 (0.003) | 13.13 (0.008) | |||
| RP magnitude | 13.49 (0.004) | 13.49 (0.002) | |||
| Pan g magnitude | 13.20 | ||||
| Pan r magnitude | 13.51 (0.004) | ||||
| Pan i magnitude | 13.84 (0.003) | ||||
| Pan z magnitude | 14.08 (0.001) | ||||
| Pan y magnitude | 14.25 (0.002) | ||||
| E(B-V) | 0.116 | ||||
* 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.