All names: Gaia EDR3 4570450003059827584, Gaia DR2 4570450003059827584, ZTF J172034.24+243843.7, SDSS J172034.23+243843.73, CRTS J172034.2+243843, Gaia DR3 4570450003059827584, SDSS J172034.23+243843.7
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|
| Right ascension | 17 20 34.23 (0.1) | 17 20 34.23 | 17 20 34.23 (0.2) | 17 20 34.23 (0.1) | |||
| Declination | 24 38 43.69 (0.2) | 24 38 43.73 | 24 38 43.69 (0.2) | 24 38 43.71 (0.2) | |||
| Spectral type | sdA | sdA | |||||
| Effective temperature | [K] | 7676.0 (43) | |||||
| log(g) | [cgs] | 5.73 (0.2) | |||||
| Mass | [M☉] | 0.15088 (0.0005) | |||||
| log(Luminosity) | [L☉] | ||||||
| Cooling age | [Gyr] | ||||||
| log(H/He) | |||||||
| log(C/He) | |||||||
| log(Ca/He) | |||||||
| log(Ca/H) | |||||||
| Parallax | [mas] | -0.12 (0.2) | -0.05 (0.3) | ||||
| Distance | [pc] | ||||||
| Composition | |||||||
| Proper motion (right ascension) | [mas/yr] | -1.426231591 (0.2) | -1.58758407 (0.4) | -1.426 (0.2) | |||
| Proper motion (declination) | [mas/yr] | -1.279140082 (0.2) | -1.371158658 (0.5) | -1.279 (0.2) | |||
| Variability | |||||||
| Magnetic | |||||||
| Bd | [MG] | ||||||
| Infrared excess (disk) | |||||||
| Binarity | |||||||
| B magnitude | |||||||
| V magnitude | 19.11 | ||||||
| R magnitude | |||||||
| I magnitude | |||||||
| J magnitude | |||||||
| H magnitude | |||||||
| K magnitude | |||||||
| u magnitude | 20.51 (0.05) | 20.51 (0.05) | 20.51 (0.05) | ||||
| g magnitude | 19.36 (0.01) | 19.36 (0.02) | 19.36 (0.02) | ||||
| r magnitude | 19.20 (0.01) | 19.23 (0.01) | 19.23 (0.01) | ||||
| i magnitude | 19.19 (0.01) | 19.20 (0.02) | 19.20 (0.02) | ||||
| z magnitude | 19.34 (0.05) | 19.38 (0.05) | 19.38 (0.05) | ||||
| G magnitude | 19.04 (0.02) | 19.07 | 19.04 (0.005) | ||||
| BP magnitude | 19.32 (0.02) | 19.25 | |||||
| RP magnitude | 18.72 (0.02) | 18.68 | |||||
| Pan g magnitude | 19.15 (0.02) | ||||||
| Pan r magnitude | 19.01 (0.02) | ||||||
| Pan i magnitude | 19.00 (0.02) | ||||||
| Pan z magnitude | 19.02 (0.02) | ||||||
| Pan y magnitude | 19.10 (0.05) | ||||||
| E(B-V) | |||||||
* 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.