tropical month

tropical month

The time of 27.321 58 days, on average, taken by the Moon to complete one revolution around the Earth, measured with respect to the vernal equinox.

Tropical Month

 

the period of revolution of the moon around the earth, with respect to the vernal equinox. The tropical month is equal to 27.321582 mean solar days.

tropical month

[′träp·ə·kəl ′mənth] (astronomy) The average period of the revolution of the moon about the earth with respect to the vernal equinox, a period of 27 days 7 hours 43 minutes 4.7 seconds, or approximately 27⅓ days.

tropical month

tropical monthThe average period of the revolution of the moon about the earth with respect to the vernal equinox, a period of 27 days 7 h 43 min 4.7 s, or approximately 27⅓ days.