All names: GALEX J170659.0+214211, Gaia DR3 4568071484530665728, Gaia EDR3 4568071484530665728, WD 1704+217, SDSS J170659.07+214211.6, [HHD2009] SDSS J1706+2142, WIRED J170659.07+214211.6, SDSS J170659.07+214211.7, Gaia DR2 4568071484530665728
| 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 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 06 59.06 (0.1) | 17 06 59.07 | 17 06 59.06 (0.1) | 17 06 59.07 | 17 06 59.07 (0.1) | 17 06 59.07 | 17 06 58.90 | 17 06 59.07 | ||||
| Declination | 21 42 11.80 (0.1) | 21 42 11.68 | 21 42 11.79 (0.2) | 21 42 11.59 | 21 42 11.66 (0.1) | 21 42 11.69 | 21 42 05.76 | 21 42 11.69 | ||||
| Spectral type | DA+M | DA+M | DA+M | DA d | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 14899.0 (745) | 10717.0 (114) | 10502.0 (109) | ||||||||
| log(g) | [cgs] | 7.61 (0.2) | 8.07 (0.1) | 8.06 (0.1) | ||||||||
| Mass | [M☉] | 0.42 (0.08) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| Parallax | [mas] | 1.55 (0.2) | 1.50 (0.2) | 1.55 (0.2) | ||||||||
| Distance | [pc] | 645.33 (82) | 668.08 (109) | 161.00 (31) | 645.33 (82) | |||||||
| Composition | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -13.55154308 (0.2) | -13.52121648 (0.3) | -13.552 (0.2) | -20.6 | |||||||
| Proper motion (declination) | [mas/yr] | 8.787629936 (0.2) | 8.938191558 (0.4) | 8.788 (0.2) | 10.1 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | WDMS | WDMS | WDMS | ||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 19.62 (0.03) | 19.60 | 19.61 (0.03) | 19.60 (0.03) | 19.60 | 19.61 (0.03) | ||||||
| g magnitude | 19.14 (0.01) | 19.16 | 19.14 (0.01) | 19.16 (0.01) | 19.16 | 19.15 (0.01) | ||||||
| r magnitude | 19.29 (0.01) | 19.26 | 19.26 (0.01) | 19.26 (0.01) | 19.26 | 19.26 (0.01) | ||||||
| i magnitude | 19.08 (0.01) | 19.02 | 19.03 (0.01) | 19.02 (0.02) | 19.02 | 19.02 (0.02) | ||||||
| z magnitude | 18.69 (0.03) | 18.65 | 18.65 (0.04) | 18.65 (0.04) | 18.65 | 18.64 (0.04) | ||||||
| G magnitude | 19.06 (0.03) | 19.08 | 19.06 (0.003) | |||||||||
| BP magnitude | 19.25 (0.03) | 19.22 | ||||||||||
| RP magnitude | 18.66 (0.02) | 18.62 | ||||||||||
| Pan g magnitude | 19.15 (0.008) | |||||||||||
| Pan r magnitude | 19.26 (0.005) | |||||||||||
| Pan i magnitude | 19.08 (0.009) | |||||||||||
| Pan z magnitude | 18.79 (0.02) | |||||||||||
| Pan y magnitude | 18.49 (0.03) | |||||||||||
| E(B-V) | 0.040 | |||||||||||
* 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.