All names: GALEX J172802.9+232913, Gaia DR2 4569142408855846784, Gaia EDR3 4569142408855846784, J1728-2329, Gaia DR3 4569142408855846784
| Parameter | Unit | Gaia EDR3 | Fantin et al. 2021 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 17 28 02.89 (0.2) | 17 28 02.89 (0.2) | |||
| Declination | 23 29 12.08 (0.3) | 23 29 13.44 (0.3) | |||
| Spectral type | DC: | ||||
| Effective temperature | [K] | 23573.0 (1284) | |||
| log(g) | [cgs] | ||||
| Mass | [M☉] | 1.255 (0.05) | |||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 3.70 (0.4) | 3.70 (0.4) | ||
| Distance | [pc] | 270.61 (30) | 270.61 (30) | ||
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 6.43 (0.3) | 6.43 (0.3) | ||
| Proper motion (declination) | [mas/yr] | -85.142 (0.4) | -85.142 (0.4) | ||
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 20.17 (0.005) | 20.17 (0.005) | |||
| BP magnitude | 20.08 (0.06) | ||||
| RP magnitude | 20.17 (0.09) | ||||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.029 | ||||
* 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.