SunIn one signOne monthMoonIn one sign2 ¼ daysMarsIn one sign49 daysMercuryIn one signOne monthVenusIn one signOne monthJupiterIn one sign361 days (1 year)SaturnIn one sign2 ½ yearsRahuIn one sign1 ½ yearsKetuIn one sign1 ½ years
Although the average time taken by a planet in a Rashi is as above, changes are not ruled out.
The nature of planets:
Mercury, Jupiter, VenusBeneficsFull moonBeneficSun, Mars, Saturn, Rahu, KetuMalefic
(A waning Moon and Mercury associated with a malefic are malefics)