All names: SDSS J164750.42+250144.6, 2MASS J16475041+2501445, WIRED J164750.42+250144.6, [HHD2009] SDSS J1647+2501, Gaia DR3 1300289739569740416, Gaia DR2 1300289739569740416, SDSS J164750.42+250144.7, TIC 236018761, Gaia EDR3 1300289739569740416, WD 1645+251
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 47 50.41 (0.06) | 16 47 50.42 | 16 47 50.41 (0.09) | 16 47 50.42 | 16 47 50.42 (0.06) | 16 47 50.42 | 16 47 50.11 | 16 47 50.42 | |||
| Declination | 25 01 44.90 (0.08) | 25 01 44.69 | 25 01 44.90 (0.1) | 25 01 44.62 | 25 01 44.67 (0.08) | 25 01 44.68 | 25 01 39.36 | 25 01 44.68 | |||
| Spectral type | DA+M | DA+dMe | DA+M | DA dM | DA+M | ||||||
| Effective temperature | [K] | 14393.0 (1813) | 6300.0 (2) | 6300.0 (1) | |||||||
| log(g) | [cgs] | 8.44 (0.3) | 7.10 (0.1) | 7.16 (0.3) | |||||||
| Mass | [M☉] | 0.89 (0.2) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.83 (0.1) | 2.72 (0.1) | 2.83 (0.1) | |||||||
| Distance | [pc] | 353.86 (13) | 367.94 (18) | 399.00 (27) | 353.86 (13) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -12.34227673 (0.09) | -11.94414353 (0.2) | -12.342 (0.09) | -12.1 | ||||||
| Proper motion (declination) | [mas/yr] | 14.441564 (0.1) | 14.28805389 (0.3) | 14.442 (0.1) | 8.2 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.59 (0.06) | ||||||||||
| H magnitude | 15.00 (0.07) | ||||||||||
| K magnitude | 14.91 (0.2) | ||||||||||
| u magnitude | 19.48 (0.03) | 19.51 | 19.50 (0.03) | 19.51 (0.03) | 19.51 | 19.48 (0.03) | |||||
| g magnitude | 18.97 (0.009) | 18.99 | 18.97 (0.009) | 18.99 (0.02) | 18.99 | 18.96 (0.02) | |||||
| r magnitude | 18.68 (0.009) | 18.70 | 18.68 (0.009) | 18.70 (0.01) | 18.70 | 18.68 (0.01) | |||||
| i magnitude | 17.72 (0.007) | 17.73 | 17.73 (0.007) | 17.73 (0.01) | 17.73 | 17.70 (0.01) | |||||
| z magnitude | 17.03 (0.01) | 17.06 | 17.07 (0.01) | 17.07 (0.02) | 17.07 | 17.03 (0.02) | |||||
| G magnitude | 18.19 (0.02) | 18.21 | 18.19 (0.003) | ||||||||
| BP magnitude | 18.96 (0.02) | 18.92 | |||||||||
| RP magnitude | 17.25 (0.006) | 17.26 | |||||||||
| Pan g magnitude | 18.91 (0.009) | ||||||||||
| Pan r magnitude | 18.67 (0.007) | ||||||||||
| Pan i magnitude | 17.74 (0.003) | ||||||||||
| Pan z magnitude | 17.15 (0.005) | ||||||||||
| Pan y magnitude | 16.84 (0.005) | ||||||||||
| 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.