All names: GALEX J170202.8+252849, SDSS J170202.84+252848.7, Gaia DR2 4572945413417974400, Gaia DR3 4572945413417974400, Gaia EDR3 4572945413417974400, SDSS J170202.84+252848.8
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|
| Right ascension | 17 02 02.84 (0.4) | 17 02 02.84 (0.4) | 17 02 02.84 (0.4) | 17 02 02.84 | ||
| Declination | 25 28 48.75 (0.4) | 25 28 48.75 (0.5) | 25 28 48.78 (0.4) | 25 28 48.77 | ||
| Spectral type | DAH | DAH: | ||||
| Effective temperature | [K] | 21603.0 (880) | ||||
| log(g) | [cgs] | 7.88 (0.1) | ||||
| Mass | [M☉] | |||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| Parallax | [mas] | 1.79 (0.6) | 1.92 (0.7) | 1.79 (0.6) | ||
| Distance | [pc] | 557.80 (178) | 521.00 (184) | 557.82 (178) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | -1.991597589 (0.5) | -1.279 (0.9) | -1.992 (0.5) | ||
| Proper motion (declination) | [mas/yr] | -2.286387242 (0.5) | 0.09 (1) | -2.286 (0.5) | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | ||||||
| V magnitude | ||||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | 20.23 (0.07) | 20.23 (0.07) | ||||
| g magnitude | 20.14 (0.03) | 20.14 (0.03) | ||||
| r magnitude | 20.44 (0.04) | 20.44 (0.04) | ||||
| i magnitude | 20.85 (0.08) | 20.85 (0.08) | ||||
| z magnitude | 22.02 (0.9) | 22.02 (0.9) | ||||
| G magnitude | 20.35 (0.06) | 20.43 | 20.35 (0.006) | |||
| BP magnitude | 20.32 (0.06) | 20.19 | ||||
| RP magnitude | 20.53 (0.08) | 20.29 | ||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.032 | |||||
* 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.