All names: NLTT 44854, SDSS J172830.78+072113.4, Gaia DR3 4487104135457345920, WDS J17285+0722A, Gaia DR2 4487104135457345920, WD 1726+074.2, USNO-B1.0 0973-00360796, LP 567-39, ** LDS 4743A, SDSS J172830.79+072113.4, LSPM J1728+0721N
| Parameter | Unit | Simbad |
|---|---|---|
| Right ascension | 17 28 30.82 (0.09) | |
| Declination | 07 21 15.04 (0.07) | |
| Spectral type | DB? | |
| 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] | 21.14 (0.1) |
| Distance | [pc] | 47.30 (0.3) |
| Composition | ||
| Proper motion (right ascension) | [mas/yr] | -80.251 (0.1) |
| Proper motion (declination) | [mas/yr] | -295.357 (0.09) |
| Variability | ||
| Magnetic | ||
| Bd | [MG] | |
| Infrared excess (disk) | ||
| Binarity | ||
| B magnitude | 17.40 | |
| V magnitude | ||
| R magnitude | 16.40 | |
| I magnitude | ||
| J magnitude | ||
| H magnitude | ||
| K magnitude | ||
| u magnitude | 19.34 (0.03) | |
| g magnitude | 18.35 (0.007) | |
| r magnitude | 17.86 (0.006) | |
| i magnitude | 17.67 (0.007) | |
| z magnitude | 17.59 (0.02) | |
| G magnitude | 17.89 (0.003) | |
| BP magnitude | ||
| RP magnitude | ||
| Pan g magnitude | ||
| Pan r magnitude | ||
| Pan i magnitude | ||
| Pan z magnitude | ||
| Pan y magnitude | ||
| E(B-V) | ||
* 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.