mean sidereal time

mean sidereal time

See sidereal time.

mean sidereal time

[′mēn si′dir·ē·əl ′tīm]
(astronomy)
Sidereal time adjusted for nutation, to eliminate slight irregularities in the rate.
References in periodicals archive ?
I would love to see Voyager 4's Time panel simultaneously show Local Mean Solar Time, Local Apparent Solar Time, Zone Time, Universal Time, and Local Mean Sidereal Time. Clearly displaying these variations of time reckoning would help people understand why and how they are used, which is important to me as an astronomy teacher.
The celestial coordinate of right ascension (R.A.) is in fact "local mean sidereal time." Thus, if you know the sidereal time, you know what R.A.
MTT = RA - GMST at [0.sup.h] Next Day, where RA is the star's right ascension and GMST is the Greenwich Mean Sidereal Time at [0.sup.h] Universal Time on the next day.