All names: Gaia DR3 4570629777508086400, LAMOST J172757.38+250835.7, PG 1725+252, Gaia DR2 4570629777508086400, 2MASS J17275737+2508356, GSC 02079-01551, [TFW97] J172757.39+250835.69, GALEX J172757.2+250834, PG1725+252, TIC 359392259, USNO-A2.0 1125-08281880
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 27 57.38 | 17 27 57.38 (0.02) | ||
| Declination | 25 08 35.69 | 25 08 35.70 (0.02) | ||
| Spectral type | sdB+WD | sdB1.5VIIHe2 | ||
| Effective temperature | [K] | 28900.0 (900) | ||
| log(g) | [cgs] | 5.54 (0.1) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.67 (0.05) | 1.69 (0.03) | |
| Distance | [pc] | 598.80 (17) | 592.42 (11) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -18.337 (0.07) | -18.349 (0.03) | |
| Proper motion (declination) | [mas/yr] | 6.183 (0.07) | 5.962 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 11.54 | |||
| V magnitude | 13.01 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 13.50 (0.03) | 13.50 (0.03) | ||
| H magnitude | 13.64 (0.04) | 13.64 (0.04) | ||
| K magnitude | 13.66 (0.04) | 13.66 (0.04) | ||
| u magnitude | 13.75 (0.005) | |||
| g magnitude | 12.90 (0.001) | |||
| r magnitude | 13.33 (0.002) | |||
| i magnitude | 13.65 (0.002) | |||
| z magnitude | 14.12 (0.005) | |||
| G magnitude | 12.99 (0.0007) | 12.96 (0.003) | ||
| BP magnitude | 12.80 (0.005) | |||
| RP magnitude | 13.19 (0.001) | |||
| Pan g magnitude | 12.96 | |||
| Pan r magnitude | 13.33 | |||
| Pan i magnitude | 13.52 (0.005) | |||
| Pan z magnitude | 13.79 (0.002) | |||
| Pan y magnitude | 13.95 (0.004) | |||
| E(B-V) | 0.039 | |||
* 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.