v_sun

Astronomy.v_sun(mjd, ra_source, dec_source)

LSR velocity of the sun

Notes

The velocity of the Sun with respect to the Local Standard of Rest is the conventional value of 20.0 km/s toward RA, dec = 18h03m50.29s, +30d00’16.8 (J2000)

:param mjdint

mean Julian day

:param ra_sourcefloat

Right ascension in decimal hours

:param dec_sourcefloat

Declination in decimal degrees

Returns

float the projection onto the line of sight of the velocity of the Sun with respect to the Local Standard of Rest on the date given by mjd at UT = 0h.