▁years . ▁When ▁viewed ▁in ▁this ▁time ▁frame ▁the ▁so - called ▁" pre cess ion ▁of ▁the ▁equ ino xes " ▁can ▁appear ▁to ▁m im ic ▁a ▁sec ular ▁phenomen on ▁since ▁the ▁ax ial ▁pre cess ion ▁takes ▁ 2 5 , 7 7 1 . 5 ▁years ▁and ▁monitoring ▁it ▁over ▁a ▁much ▁smaller ▁time frame ▁appears ▁to ▁simply ▁result ▁in ▁a ▁" d rift " ▁of ▁the ▁position ▁of ▁the ▁equ ino x ▁in ▁the ▁plane ▁of ▁the ▁e cli ptic ▁of ▁approximately ▁one ▁degree ▁every ▁ 7 1 . 6 ▁years , ▁influen cing ▁the ▁Mil ank ov itch ▁cycles . ▁ ▁The ▁plan ets ▁ ▁Sec ular ▁variation ▁also ▁refers ▁to ▁long - term ▁tr ends ▁in ▁the ▁or bits ▁of ▁the ▁plan ets ▁Mercur y ▁to ▁Ne pt une . ▁Several ▁attempts ▁have ▁from ▁time ▁to ▁time ▁been ▁undert aken ▁to ▁analyze ▁and ▁predict ▁such ▁gravit ational ▁devi ations ▁from ▁ordinary ▁satellite ▁or bits . ▁O thers ▁are ▁often ▁referred ▁to ▁as ▁post ▁ke pler ian ▁effects . ▁ ▁Vari ations ▁Sé cul aires ▁des ▁Or bit es ▁Plan éta ires ▁( VS OP ) ▁is ▁a ▁modern ▁numerical ▁model ▁that ▁tries ▁to ▁address ▁the ▁problem . ▁ ▁Market ▁tr ends ▁Market ▁tr ends ▁are ▁class ified ▁as ▁sec ular , ▁primary ▁and ▁secondary ▁for ▁long , ▁medium ▁and ▁short ▁time ▁frames . ▁Some ▁trad ers ▁identify ▁market ▁tr ends ▁using ▁technical ▁analysis . ▁ ▁Ge om agnet ic ▁sec ular ▁variation ▁Ge om agnet