All names: [HHD2009] SDSS J1242+4506, WISEA J124254.57+450659.4, GALEX J124254.6+450658, SDSS J124254.62+450658.6, SDSS J124254.62+450658.5, WISE J124254.59+450659.6, LAMOST J124254.62+450658.5, WD 1240+453, Gaia DR2 1541033101871032704, WIRED J124254.62+450658.5, Gaia EDR3 1541033101871032704
| 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 | 12 42 54.60 (0.2) | 12 42 54.62 | 12 42 54.60 (0.2) | 12 42 54.62 | 12 42 54.62 | 12 42 54.62 | 12 42 54.55 | 12 42 54.62 | |||
| Declination | 45 06 58.55 (0.2) | 45 06 58.58 | 45 06 58.54 (0.2) | 45 06 58.50 | 45 06 58.58 | 45 06 58.58 | 45 06 52.56 | 45 06 58.55 | |||
| Spectral type | DA+M | DA+M | DA+M | DA d | DA+M | ||||||
| Effective temperature | [K] | 16717.0 (758) | 9389.0 (94) | 9249.0 (93) | |||||||
| log(g) | [cgs] | 7.99 (0.2) | 8.10 (0.1) | 8.06 (0.1) | |||||||
| Mass | [M☉] | 0.61 (0.1) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 2.46 (0.3) | 2.15 (0.4) | ||||||||
| Distance | [pc] | 407.31 (52) | 465.31 (86) | 594.00 (98) | |||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -17.40168719 (0.2) | -21.1785551 (0.5) | -16.0 (4) | -14.0 | ||||||
| Proper motion (declination) | [mas/yr] | 14.1493603 (0.3) | 11.75085323 (0.5) | 8.0 (4) | 8.3 | ||||||
| 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 | 19.57 (0.03) | 19.66 | 19.57 (0.03) | 19.66 (0.04) | 19.66 | 19.65 (0.04) | |||||
| g magnitude | 19.23 (0.01) | 19.30 | 19.23 (0.01) | 19.30 (0.02) | 19.30 | 19.29 (0.02) | |||||
| r magnitude | 19.27 (0.01) | 19.44 | 19.27 (0.01) | 19.44 (0.02) | 19.44 | 19.43 (0.02) | |||||
| i magnitude | 18.71 (0.01) | 18.95 | 18.71 (0.01) | 18.95 (0.03) | 18.95 | 18.93 (0.02) | |||||
| z magnitude | 18.11 (0.03) | 18.27 | 18.11 (0.03) | 18.27 (0.03) | 18.27 | 18.25 (0.03) | |||||
| G magnitude | 19.53 (0.02) | 19.56 | |||||||||
| BP magnitude | 19.38 (0.02) | 19.35 | |||||||||
| RP magnitude | 18.40 (0.04) | 18.44 | |||||||||
| Pan g magnitude | 19.31 (0.01) | ||||||||||
| Pan r magnitude | 19.46 (0.02) | ||||||||||
| Pan i magnitude | 18.86 (0.02) | ||||||||||
| Pan z magnitude | 18.41 (0.009) | ||||||||||
| Pan y magnitude | 18.15 (0.008) | ||||||||||
| E(B-V) | 0.018 | ||||||||||
* 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.