All names: 2MASS J17272113+2825209, TIC 298538751, Gaia DR3 4598390934280185728, Gaia DR2 4598390934280185728, SDSS J172721.12+282521.1, Gaia EDR3 4598390934280185728, PG1725+285, PG 1725+285, GALEX J172721.1+282520
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 27 21.12 (0.02) | 17 27 21.14 | 17 27 21.13 (0.02) | ||
| Declination | 28 25 21.02 (0.03) | 28 25 21.25 | 28 25 21.07 (0.03) | ||
| 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] | 0.73 (0.04) | 0.75 (0.05) | 0.73 (0.04) | |
| Distance | [pc] | 1376.65 (66) | 1339.23 (91) | 1376.65 (66) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -3.99 (0.03) | -4.143 (0.08) | -3.99 (0.03) | |
| Proper motion (declination) | [mas/yr] | -2.926 (0.04) | -3.107 (0.09) | -2.926 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.89 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.36 (0.1) | 16.36 (0.1) | |||
| H magnitude | 17.53 | ||||
| K magnitude | 15.92 | ||||
| u magnitude | 15.50 (0.004) | 15.48 (0.01) | |||
| g magnitude | 15.68 (0.003) | 15.71 (0.007) | |||
| r magnitude | 16.16 (0.004) | 16.17 (0.01) | |||
| i magnitude | 16.50 (0.005) | 16.50 (0.02) | |||
| z magnitude | 16.77 (0.01) | 16.77 (0.02) | |||
| G magnitude | 15.93 (0.003) | 15.95 (0.001) | 15.93 (0.003) | ||
| BP magnitude | 15.80 (0.004) | 15.76 (0.006) | |||
| RP magnitude | 16.18 (0.005) | 16.18 (0.004) | |||
| Pan g magnitude | 15.76 (0.002) | ||||
| Pan r magnitude | 16.17 (0.003) | ||||
| Pan i magnitude | 16.51 (0.004) | ||||
| Pan z magnitude | 16.79 (0.005) | ||||
| Pan y magnitude | 16.95 (0.01) | ||||
| E(B-V) | 0.031 | ||||
* 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.