All names: 2MASS J18420281+4531590, Gaia DR2 2117713997018899584, TIC 123127763, Gaia DR3 2117713997018899584, O11J184203+453159, GALEX J184202.9+453159, WISEA J184202.80+453158.9, UCAC4 678-066024, WISE J184202.80+453158.9
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 18 42 03.00 | 18 42 02.81 (0.02) | ||
| Declination | 45 31 59.00 | 45 31 59.08 (0.02) | ||
| Spectral type | sd | |||
| 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] | 0.04 (0.03) | 0.09 (0.02) | |
| Distance | [pc] | 22988.51 (16964) | 10940.92 (2083) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -2.373 (0.06) | -2.331 (0.02) | |
| Proper motion (declination) | [mas/yr] | -4.624 (0.06) | -4.615 (0.02) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.10 (0.05) | |||
| V magnitude | 14.39 (0.03) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.56 (0.03) | 14.56 (0.03) | ||
| H magnitude | 14.62 (0.05) | 14.62 (0.05) | ||
| K magnitude | 14.55 (0.07) | 14.55 (0.07) | ||
| u magnitude | ||||
| g magnitude | 14.13 (0.05) | |||
| r magnitude | 14.60 (0.08) | |||
| i magnitude | 14.80 (0.01) | |||
| z magnitude | ||||
| G magnitude | 14.35 (0.0005) | 14.33 (0.003) | ||
| BP magnitude | 14.26 (0.004) | |||
| RP magnitude | 14.42 (0.002) | |||
| Pan g magnitude | 14.23 (0.005) | |||
| Pan r magnitude | 14.51 (0.002) | |||
| Pan i magnitude | 14.76 (0.002) | |||
| Pan z magnitude | 14.95 (0.002) | |||
| Pan y magnitude | 15.05 (0.004) | |||
| E(B-V) | 0.034 | |||
* 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.