On the decrease of sunspot activity and absence of severe space weather conditions during the multiple planetary conjunction periods of 1850-2000 AD

TL;DR

This study analyzes solar activity and space weather during planetary conjunctions from 1850 to 2000, finding decreased sunspot activity and fewer severe space weather events, which has implications for space mission planning.

Contribution

It presents evidence of reduced solar activity during planetary conjunctions and suggests planetary influences on sunspot organization, with applications in space mission planning and solar-terrestrial predictions.

Findings

Decreased sunspot activity during MPC periods

Fewer severe space weather events during MPC

Successful space missions coincided with MPC periods

Abstract

We have studied solar activity and space weather conditions during multiple planetary conjunction periods ( MPC) as observed from Earth during the years 1850-2000 AD. Significant decreases in sunspot activity and solar 10.7 cm radio flux and absence of severe space weather conditions is found during most of these MPC . Possible planetary influences in longitudinal organisation of sunspot activity is suggested by these results. The success of major space missions ( lunar and human) during MPC is also noticed during 1957-2000 AD. The applications of the above results include: short term space mission planning and inference/prediction of solar-terrestrial conditions during multiple planetary conjunction periods.