Retrograde periods for Mercury, Venus, Mars, Jupiter and Saturn. Rahu and Ketu are always retrograde by convention.
3 retrograde periods in 1972
23 days in मीन
24 days in कर्कट
20 days in वृश्चिक
1 retrograde period in 1972
122 days in धनु
1 retrograde period in 1972
43 days in मिथुन
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.
