All names: SDSS J174030.87+514421.7, GALEX J174030.9+514420, 2MASS J17403084+5144217, Gaia DR2 1368415548745660160, TIC 298551823, Gaia EDR3 1368415548745660160, SDSSJ174030.87+514421.7, Gaia DR3 1368415548745660160
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 40 30.87 (0.03) | 17 40 30.88 | 17 40 30.87 (0.03) | ||
| Declination | 51 44 21.70 (0.03) | 51 44 21.72 | 51 44 21.77 (0.03) | ||
| Spectral type | sd | sd | |||
| 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] | 0.42 (0.03) | 0.52 (0.05) | 0.42 (0.03) | |
| Distance | [pc] | 2407.90 (202) | 1909.49 (185) | 2407.90 (202) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -0.894 (0.05) | -1.025 (0.1) | -0.894 (0.05) | |
| Proper motion (declination) | [mas/yr] | -4.112 (0.05) | -4.247 (0.1) | -4.112 (0.05) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.59 (0.1) | 16.59 (0.1) | |||
| H magnitude | 16.24 | ||||
| K magnitude | 17.13 | ||||
| u magnitude | 15.55 (0.02) | ||||
| g magnitude | 15.82 (0.01) | ||||
| r magnitude | 16.30 (0.01) | ||||
| i magnitude | 16.67 (0.01) | ||||
| z magnitude | 16.99 (0.02) | ||||
| G magnitude | 16.06 (0.003) | 16.09 (0.002) | 16.06 (0.003) | ||
| BP magnitude | 15.92 (0.004) | 15.85 (0.008) | |||
| RP magnitude | 16.34 (0.008) | 16.34 (0.008) | |||
| Pan g magnitude | 15.89 (0.003) | ||||
| Pan r magnitude | 16.32 (0.003) | ||||
| Pan i magnitude | 16.68 (0.003) | ||||
| Pan z magnitude | 16.95 (0.004) | ||||
| Pan y magnitude | 17.15 (0.01) | ||||
| E(B-V) | 0.030 | ||||
* 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.