// Generate spectral type
SpectralType spectralType = new SpectralType( spType );
// Generate photometry
Photometry photometry = new Photometry(magMv, distance, vMinusI, absV);
// Generate astrometry
StellarAstrometry stellarAstrometry = new StellarAstrometry(
new AstrometricParam(ra, dec, parallax, muRa, muDec, vRad));