All names: SDSS J144239.69+401319.1, USNO-B1.0 1302-00245056, Gaia DR2 1488064949540111104, NLTT 38189, WD 1440+404, LP 221-303, SDSS J144239.68+401319.1, SDSS J144239.69+401319.2, LSPM J1442+4013
| Parameter | Unit | Simbad |
|---|---|---|
| Right ascension | 14 42 39.74 (0.1) | |
| Declination | 40 13 19.38 (0.2) | |
| Spectral type | DQp | |
| Effective temperature | [K] | |
| log(g) | [cgs] | |
| Mass | [M☉] | |
| log(Luminosity) | [L☉] | |
| Cooling age | [Gyr] | |
| log(H/He) | ||
| log(C/He) | ||
| log(Ca/He) | ||
| log(Ca/H) | ||
| Parallax | [mas] | 12.51 (0.2) |
| Distance | [pc] | 79.94 (1) |
| Composition | ||
| Proper motion (right ascension) | [mas/yr] | -201.989 (0.3) |
| Proper motion (declination) | [mas/yr] | -84.947 (0.3) |
| Variability | ||
| Magnetic | ||
| Bd | [MG] | |
| Infrared excess (disk) | ||
| Binarity | ||
| B magnitude | 20.00 | |
| V magnitude | ||
| R magnitude | 19.10 | |
| I magnitude | ||
| J magnitude | 18.15 (0.04) | |
| H magnitude | 18.24 (0.05) | |
| K magnitude | 18.20 (0.08) | |
| u magnitude | 20.19 (0.04) | |
| g magnitude | 19.45 (0.01) | |
| r magnitude | 18.81 (0.009) | |
| i magnitude | 18.65 (0.01) | |
| z magnitude | 18.61 (0.03) | |
| G magnitude | 18.91 (0.002) | |
| BP magnitude | ||
| RP magnitude | ||
| Pan g magnitude | ||
| Pan r magnitude | ||
| Pan i magnitude | ||
| Pan z magnitude | ||
| Pan y magnitude |
* 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 (LANL). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.