nodical

Nodical month month month month 27.5546 29.5306 27.3216 27.2122 days days days days Number of months or years Number of solar days 7 6.5 7 7 192.88 191.95 191.25 190.49 15 14 15 15 413.32 413.43 409.82 408.18 60 56 60.5 61 1653.27 1653.71 1652.95 1659.95 112 104 113 113.5 3086.11 3085.95 3087.34 3088.59 172 160 173 174 4739.38 4739.66 4740.29 4734.93 239 223 241 242 6585.54 6585.32 6584.50 6585.36 299 279 301.5 303 8238.81 8239.03 8237.46 8245.30 351 327 354 355 9671.65 9671.27 9671.84 9673.94 Number of months or years Number of solar days Evection Gregor.

Halfway through its nodical cycle, 9.3 years later, the range of the Moon's declination is reduced from 18.307[degrees]N to 18.307[degrees]S.

The Doodson variables are defined through the lunar and solar ephemeris, there are six of them corresponding to periods of a lunar day (1.0035 days), nodical month (27.32 days), tropical year (365.2422 days), lunar perigee period (8.847 years), lunar node period (18.61 years) and solar perigee period (20940 years).