All names: FBS B 749, SDSS J170416.37+645128.8, Gaia DR3 1632316034677934720, TIC 459982139, 2MASS J17041638+6451284, SDSS J170416.38+645128.5, GALEXJ17042+6451, Gaia EDR3 1632316034677934720, FBS 1703+649, Gaia DR2 1632316034677934720
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 04 16.38 (0.03) | 17 04 16.64 | 17 04 16.39 (0.03) | ||
| Declination | 64 51 28.61 (0.03) | 64 51 28.26 | 64 51 28.54 (0.03) | ||
| Spectral type | He-sdOB | sdOBHe | |||
| 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] | 0.93 (0.03) | 0.84 (0.04) | 0.93 (0.03) | |
| Distance | [pc] | 1080.26 (38) | 1185.82 (61) | 1080.26 (38) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -5.513 (0.04) | -5.536 (0.09) | -5.513 (0.04) | |
| Proper motion (declination) | [mas/yr] | 4.655 (0.04) | 4.728 (0.09) | 4.655 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.70 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 14.64 (0.06) | 14.64 (0.06) | |||
| H magnitude | 14.79 (0.07) | 14.79 (0.07) | |||
| K magnitude | 14.93 (0.1) | 14.93 (0.1) | |||
| u magnitude | 13.27 (0.003) | 13.25 (0.01) | |||
| g magnitude | 13.61 (0.02) | ||||
| r magnitude | 14.13 (0.004) | 14.13 (0.01) | |||
| i magnitude | 14.50 (0.004) | 14.47 (0.02) | |||
| z magnitude | 14.83 (0.005) | 14.87 (0.02) | |||
| G magnitude | 13.87 (0.003) | 13.88 (0.0004) | 13.87 (0.003) | ||
| BP magnitude | 13.70 (0.003) | 13.64 (0.004) | |||
| RP magnitude | 14.19 (0.004) | 14.18 (0.0008) | |||
| Pan g magnitude | 13.71 (0.002) | ||||
| Pan r magnitude | 14.14 (0.003) | ||||
| Pan i magnitude | 14.53 (0.003) | ||||
| Pan z magnitude | 14.83 (0.002) | ||||
| Pan y magnitude | 15.04 (0.006) | ||||
| E(B-V) | 0.025 | ||||
* 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.