pynrc.simul.skyvec2ins.ad2lb

pynrc.simul.skyvec2ins.ad2lb(alpha_rad, delta_rad)[source]

Convert equatorial coordinates (RA, Dec, i.e. alpha, delta) to ecliptic coordinates (lambda, beta) according to Eq 3 in Leinert et al. 1998.

Parameters

  • alpha_rad (ndarray) – Right ascension in radians.

  • delta_rad (ndarray) – Declination in radians.

  • lambda_rad (ndarray) – Ecliptic longitude in radians.

  • beta_rad – Ecliptic latitude in radians.