All names: SDSSJ172825.07+071717.2, SDSS J172825.07+071717.3, 2MASS J17282507+0717173, Gaia DR3 4487080225375853184, TIC 302357106, SDSS J172825.07+071717.2, Gaia DR2 4487080225375853184
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 28 25.08 | 17 28 25.08 (0.02) | ||
| Declination | 07 17 17.27 | 07 17 17.28 (0.02) | ||
| Spectral type | sdB | sdB | ||
| 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] | 0.02 (0.05) | 0.03 (0.03) | |
| Distance | [pc] | 54347.83 (155955) | 31347.96 (31938) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.126 (0.1) | -0.912 (0.03) | |
| Proper motion (declination) | [mas/yr] | -1.402 (0.09) | -1.421 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.47 (0.05) | 15.47 (0.05) | ||
| H magnitude | 15.52 (0.1) | 15.52 (0.1) | ||
| K magnitude | 15.37 (0.2) | 15.37 (0.2) | ||
| u magnitude | 15.71 (0.005) | 15.71 (0.005) | ||
| g magnitude | 15.26 (0.003) | 15.26 (0.003) | ||
| r magnitude | 15.54 (0.004) | 15.54 (0.004) | ||
| i magnitude | 15.74 (0.004) | 15.74 (0.004) | ||
| z magnitude | 15.91 (0.007) | 15.91 (0.007) | ||
| G magnitude | 15.42 (0.0009) | 15.39 (0.003) | ||
| BP magnitude | 15.36 (0.006) | |||
| RP magnitude | 15.42 (0.005) | |||
| Pan g magnitude | 15.33 (0.004) | |||
| Pan r magnitude | 15.55 (0.002) | |||
| Pan i magnitude | 15.76 (0.003) | |||
| Pan z magnitude | 15.92 (0.003) | |||
| Pan y magnitude | 16.00 (0.005) | |||
| E(B-V) | 0.158 | |||
* 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.