Lunar month circular, the speed of Earth's progression around the Sun varies during the year. Thus, the angular rate is faster nearer periapsis and slower near apoapsis. The same is so for the Moon's orbit around the Earth. Because of these variations in angular rate, the actual time between lunations may vary from about 29.18 to about 29.93 days. The long-term average duration is days (29 d 12 h 44 min 2.8016 s). The synodic month is used to calculate eclipse cycles. It is customary to specify positions of celestial bodies with respect to the vernal equinox. Because of Earth's precession of
Charles Jarrott (racing driver) 4 minutes and 12 seconds. He later entered the "Paris–Vienna Trail" (sometimes described as the VII Grand Prix de l'A.C.F.) where he finished 23rd in the Panhard et Levassor number 8, completing the 990 km in 20 hours, 44 minutes and 12 seconds. Jarrott's greatest success was winning the 1902 "Circuit des Ardennes" in the Panhard et Levassor, completing the 6 lap, 512 km race at Bastogne in car number 8, taking 5 hours, 53 minutes 39 seconds. Jarrott had inherited the lead on lap 3 after Baron Pierre de Crawhez retired in his Mors Z. In 1903 he finished