All names: [HHD2009] SDSS J1655+1956, SDSS J165516.50+195640.2, SDSS J165516.51+195640.2, Gaia DR3 4561439062891579392, Gaia EDR3 4561439062891579392, Gaia DR2 4561439058593104384, WD 1653+200
| 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 55 16.50 (0.7) | 16 55 16.51 | 16 55 16.50 (0.9) | 16 55 16.51 | 16 55 16.50 (0.7) | 16 55 16.51 | 16 55 16.49 | 16 55 16.51 | |||
| Declination | 19 56 40.10 (0.6) | 19 56 40.23 | 19 56 40.11 (1) | 19 56 40.20 | 19 56 40.31 (0.6) | 19 56 40.24 | 19 56 34.08 | 19 56 40.24 | |||
| Spectral type | DA+M | DA+M | DA+M: | DA dM | DA+M | ||||||
| Effective temperature | [K] | 17912.0 (2188) | 9282.0 (229) | 9304.0 (235) | |||||||
| log(g) | [cgs] | 7.51 (0.5) | 8.18 (0.4) | 8.13 (0.3) | |||||||
| Mass | [M☉] | 0.39 (0.2) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.07 (1) | 1.50 (1) | 2.07 (1) | |||||||
| Distance | [pc] | 483.19 (243) | 666.56 (634) | 1173.00 (169) | 483.19 (243) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.351735374 (0.8) | 3.874369833 (2) | 1.352 (0.8) | 5.3 | ||||||
| Proper motion (declination) | [mas/yr] | -13.06918914 (0.9) | -8.772586847 (3) | -13.069 (0.9) | -4.0 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.59 (0.05) | 20.66 | 20.66 (0.08) | 20.66 (0.07) | 20.66 | 20.67 (0.07) | |||||
| g magnitude | 20.37 (0.02) | 20.41 | 20.37 (0.02) | 20.41 (0.02) | 20.41 | 20.38 (0.02) | |||||
| r magnitude | 20.49 (0.03) | 20.56 | 20.53 (0.03) | 20.56 (0.03) | 20.56 | 20.56 (0.03) | |||||
| i magnitude | 20.14 (0.03) | 20.23 | 20.16 (0.04) | 20.23 (0.04) | 20.23 | 20.22 (0.04) | |||||
| z magnitude | 19.68 (0.08) | 19.86 | 19.79 (0.1) | 19.86 (0.1) | 19.86 | 19.84 (0.1) | |||||
| G magnitude | 20.57 (0.09) | 20.56 | 20.57 (0.01) | ||||||||
| BP magnitude | 20.43 (0.09) | 20.18 | |||||||||
| RP magnitude | 19.82 (0.07) | 19.78 | |||||||||
| Pan g magnitude | 20.43 (0.02) | ||||||||||
| Pan r magnitude | 20.59 (0.04) | ||||||||||
| Pan i magnitude | 20.28 (0.02) | ||||||||||
| Pan z magnitude | 19.83 (0.06) | ||||||||||
| Pan y magnitude | 19.58 (0.07) | ||||||||||
| E(B-V) | 0.049 | ||||||||||
* 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.