pynrc.simul.skyvec2ins.lb2ad

pynrc.simul.skyvec2ins.lb2ad(lambda_rad, beta_rad)[source]

Convert ecliptic coordinates (lambda, beta) to equatorial coordinates (RA, Dec, i.e. alpha, delta) according to Eq 4 in Leinert et al. 1998.

Parameters

  • lambda_rad (ndarray) – Ecliptic longitude in radians.

  • beta_rad (numpy.ndarray) – Ecliptic latitude in radians.

Returns

  • alpha (ndarray) – Equatorial Right Ascension in radians.

  • delta (ndarray) – Equatorial Declination in radians.