All names: 2MASS J18420688-6818518, TIC 304862998, WDJ184207.00-681851.80, Gaia EDR3 6432981679284845696, WDJ18427.0-681851.79, WISEA J184206.89-681851.7, Gaia DR3 6432981679284845696, WISE J184206.89-681851.7, Gaia DR2 6432981674985955584, UCAC4 109-117694
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|
| Right ascension | 18 42 06.89 (0.4) | 18 42 06.89 | 18 42 07.00 (0.03) | 18 42 06.89 | ||
| Declination | -68 18 51.79 (0.7) | -68 18 51.84 | -68 18 51.80 (0.1) | -68 18 51.84 | ||
| Spectral type | CND | |||||
| 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] | 59.41 (0.2) | 59.41 (0.2) | 59.41 (0.2) | ||
| Distance | [pc] | 16.83 (0.06) | 16.83 (0.06) | 16.83 (0.06) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | -39.69803551 (0.2) | -39.698 (0.2) | -39.69803551 | ||
| Proper motion (declination) | [mas/yr] | -2.441122998 (0.3) | -2.441 (0.3) | -2.441122998 | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | 13.99 (0.01) | |||||
| V magnitude | 13.42 (0.02) | |||||
| R magnitude | 13.43 (0.08) | |||||
| I magnitude | ||||||
| J magnitude | 12.33 (0.02) | |||||
| H magnitude | 12.08 (0.02) | |||||
| K magnitude | 12.03 (0.03) | |||||
| u magnitude | ||||||
| g magnitude | 13.69 (0.03) | |||||
| r magnitude | 13.27 (0.04) | |||||
| i magnitude | 13.10 (0.04) | |||||
| z magnitude | ||||||
| G magnitude | 13.31 (0.0004) | 13.31 | 13.31 (0.003) | 13.31 | ||
| BP magnitude | 13.58 (0.0004) | 13.60 | 13.60 | |||
| RP magnitude | 12.84 (0.0004) | 12.85 | 12.85 | |||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.001 | |||||
* 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.