All names: GALEX J234257.1+144956, WD 2340+145, SDSS J234257.10+144955.4, Gaia DR2 2771289370997112704, Gaia EDR3 2771289370997112704, Gaia DR3 2771289370997112704, SDSS J234257.12+144955.6
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 42 57.10 (0.4) | 23 42 57.10 | 23 42 57.10 (0.5) | 23 42 57.10 | 23 42 57.11 (0.4) | 23 42 57.36 | 23 42 57.10 | ||
| Declination | 14 49 55.31 (0.4) | 14 49 55.49 | 14 49 55.31 (0.4) | 14 49 55.42 | 14 49 55.43 (0.4) | 14 49 50.88 | 14 49 55.43 | ||
| Spectral type | DA+M | DA | DA dM | DA+M | |||||
| Effective temperature | [K] | 21045.0 (1320) | 49509.0 (2578) | ||||||
| log(g) | [cgs] | 7.84 (0.2) | 6.57 (0.1) | ||||||
| Mass | [M☉] | 0.54 (0.1) | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.18 (0.6) | 0.22 (0.8) | 0.18 (0.6) | |||||
| Distance | [pc] | 5588.33 (18472) | 4513.52 (15855) | 196.00 (50) | 5589.71 (18481) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -4.543466861 (0.6) | -4.873499573 (1) | -4.543 (0.6) | |||||
| Proper motion (declination) | [mas/yr] | -7.600186761 (0.5) | -8.581896817 (0.9) | -7.6 (0.5) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | WDMS | WDMS | |||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 20.06 (0.05) | 20.14 | 20.06 (0.05) | 20.14 | 20.12 (0.05) | ||||
| g magnitude | 19.82 (0.02) | 20.14 | 19.82 (0.02) | 20.14 | 20.12 (0.2) | ||||
| r magnitude | 20.53 (0.04) | 20.67 | 20.53 (0.04) | 20.67 | 20.65 (0.9) | ||||
| i magnitude | 24.36 (1) | 21.89 | 24.36 (1) | 21.89 | 21.87 (2) | ||||
| z magnitude | 20.65 (0.3) | 22.54 | 22.54 (0.9) | 22.55 | 22.52 (2) | ||||
| G magnitude | 20.19 (0.6) | 20.22 | 20.19 (0.006) | ||||||
| BP magnitude | 20.01 (0.6) | 19.79 | |||||||
| RP magnitude | 20.30 (0.3) | 19.50 | |||||||
| Pan g magnitude | |||||||||
| Pan r magnitude | |||||||||
| Pan i magnitude | |||||||||
| Pan z magnitude | |||||||||
| Pan y magnitude | |||||||||
| E(B-V) | 0.052 | ||||||||
* 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.