Retrograde periods for Mercury, Venus, Mars, Jupiter and Saturn. Rahu and Ketu are always retrograde by convention.
4 retrograde periods in 1971
20 days in धनु
24 days in मेष
24 days in सिंह
20 days in वृश्चिक
1 retrograde period in 1971
123 days in वृश्चिक
1 retrograde period in 1971
60 days in मकर
1 retrograde period in 1971
134 days in वृष
Rahu and Ketu are the lunar nodes and are always Vakri (retrograde). They move backwards through the zodiac at roughly 1.5° per month and change Rashi only once every ~18 months.
