All names: 2MASS J21423480+0127446, Gaia DR3 2693553005559022848, SDSSJ214234.80+012744.3, GALEX J214234.8+012744, UCAC4 458-124207, LAMOST J214234.79+012744.3, WISE J214234.83+012743.7, Gaia DR2 2693553005559022848, Gaia EDR3 2693553005559022848, SDSS J214234.80+012744.3
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 42 34.80 (0.04) | 21 42 34.80 | 21 42 34.80 (0.04) | ||
| Declination | 01 27 44.18 (0.03) | 01 27 44.40 | 01 27 44.71 (0.03) | ||
| Spectral type | sdB | sdB/sdO | |||
| Effective temperature | [K] | 32101.0 (294) | |||
| log(g) | [cgs] | 5.93 (0.06) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.57 (0.05) | 0.55 (0.1) | 0.57 (0.05) | |
| Distance | [pc] | 1760.87 (159) | 1831.84 (407) | 1760.87 (159) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.178 (0.05) | -4.321 (0.1) | -4.178 (0.05) | |
| Proper motion (declination) | [mas/yr] | -33.35 (0.04) | -33.568 (0.1) | -33.35 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.54 (0.1) | ||||
| V magnitude | 15.56 (0.04) | ||||
| R magnitude | 15.95 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 16.13 (0.09) | 16.13 (0.09) | |||
| H magnitude | 16.29 | ||||
| K magnitude | 16.15 | ||||
| u magnitude | 15.34 (0.004) | 15.34 (0.004) | |||
| g magnitude | 15.50 (0.003) | 15.50 (0.003) | |||
| r magnitude | 15.99 (0.004) | 15.74 (0.03) | |||
| i magnitude | 16.31 (0.004) | 16.31 (0.004) | |||
| z magnitude | 16.60 (0.009) | 16.60 (0.009) | |||
| G magnitude | 15.77 (0.003) | 15.79 (0.002) | 15.77 (0.003) | ||
| BP magnitude | 15.65 (0.003) | 15.61 (0.01) | |||
| RP magnitude | 16.02 (0.005) | 16.02 (0.005) | |||
| Pan g magnitude | 15.62 (0.004) | ||||
| Pan r magnitude | 16.01 (0.002) | ||||
| Pan i magnitude | 16.35 (0.002) | ||||
| Pan z magnitude | 16.61 (0.003) | ||||
| Pan y magnitude | 16.76 (0.002) | ||||
| E(B-V) | 0.055 | ||||
* 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.