All names: [HHD2009] SDSS J1646+2324, TIC 258173688, Gaia DR2 1299480705170868736, Gaia EDR3 1299480705170868736, WIRED J164612.52+232408.8, [SGR2010] J1646+2324, SDSS J164612.52+232408.8, Gaia DR3 1299480705170868736, WD 1644+234, 2MASS J16461253+2324086, SDSS J164612.53+232408.8
| 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 46 12.54 (0.1) | 16 46 12.52 | 16 46 12.54 (0.2) | 16 46 12.52 | 16 46 12.52 (0.1) | 16 46 12.53 | 16 46 12.34 | 16 46 12.53 | |||
| Declination | 23 24 08.80 (0.2) | 23 24 08.81 | 23 24 08.80 (0.3) | 23 24 08.78 | 23 24 08.79 (0.2) | 23 24 08.80 | 23 24 02.52 | 23 24 08.80 | |||
| Spectral type | DA+M | DA+M | DA+M | DA d | DA+M | ||||||
| Effective temperature | [K] | 21535.0 (975) | 6893.0 (77) | 6350.0 (46) | |||||||
| log(g) | [cgs] | 8.00 (0.2) | 7.34 (0.2) | 5.70 (0.4) | |||||||
| Mass | [M☉] | 0.63 (0.09) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.18 (0.3) | 2.26 (0.4) | 2.18 (0.3) | |||||||
| Distance | [pc] | 458.70 (54) | 442.83 (83) | 514.00 (105) | 458.69 (54) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 10.18568221 (0.2) | 10.07638134 (0.6) | 10.186 (0.2) | 19.7 | ||||||
| Proper motion (declination) | [mas/yr] | 1.050845793 (0.2) | 2.065438736 (0.7) | 1.051 (0.2) | -1.1 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 16.49 (0.1) | ||||||||||
| H magnitude | 15.78 (0.1) | ||||||||||
| K magnitude | 15.88 (0.2) | ||||||||||
| u magnitude | 19.10 (0.02) | 19.07 | 19.05 (0.02) | 19.07 (0.03) | 19.07 | 19.07 (0.02) | |||||
| g magnitude | 19.09 (0.01) | 18.97 | 18.96 (0.009) | 18.97 (0.01) | 18.97 | 18.97 (0.01) | |||||
| r magnitude | 19.05 (0.01) | 18.86 | 18.84 (0.01) | 18.86 (0.02) | 18.86 | 18.85 (0.02) | |||||
| i magnitude | 18.41 (0.01) | 18.27 | 18.27 (0.009) | 18.27 (0.02) | 18.27 | 18.26 (0.02) | |||||
| z magnitude | 17.97 (0.02) | 17.72 | 17.71 (0.02) | 17.72 (0.02) | 17.72 | 17.75 (0.02) | |||||
| G magnitude | 18.65 (0.01) | 18.63 | 18.65 (0.004) | ||||||||
| BP magnitude | 18.95 (0.01) | 18.93 | |||||||||
| RP magnitude | 17.84 (0.01) | 17.85 | |||||||||
| Pan g magnitude | 18.95 (0.003) | ||||||||||
| Pan r magnitude | 18.86 (0.005) | ||||||||||
| Pan i magnitude | 18.25 (0.006) | ||||||||||
| Pan z magnitude | 17.87 (0.006) | ||||||||||
| Pan y magnitude | 17.66 (0.007) | ||||||||||
| E(B-V) | 0.035 | ||||||||||
* 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.