One such code is Lode Star Pro, copyrighted by Wayne C Annala in1994.
The Lodestar Pro was checked for historical eclipses of 1000-2500 BC from clay tablet records of Mesopotamia area presently available with British Museum. Lodestar Pro provided excellent match with this data.
Then there is this clear reference to pair of eclipses occurring on 13th day.
This reference to Thirteen day eclipse pair appears to be a unique astronomical observation.(A synodic month is the period from one new Moon to the next.
Mahabharata war is said to have occurred before the transition of Dwapara Yuga to Kali Yuga.
Different scholars have expressed opinions varying between the stories of Mahabharata being total fiction.
Hence, it is usual to look for Puranic and Vedic (written and oral recitation) astronomical evidence to substantiate the time periods.
Mahabharata has been verified by astronomical dating.
Amongst these, nearly 32 pairs would be occurring for period less than 14 days.
Six eclipse pairs visible at Kurukshethra occurring in less than or near 14 days Year BC Eclipse Julian Day Initial Con Max End Sunrise Sunset End/Strt Dt3129 Solar Aug 11 13d20h20m3129 Lunar Aug 25 2529 Solar Jul 11 13d20h8m2529 Lunar Jun 27 2056 Solar Nov 25 13d21h40m2056 Lunar Dec 09 1853 Solar Dec 30 13d22h14m1853 Lunar Jan 13 1708 Solar Mar 27 13d20h18m1708 Lunar Apr 10 1397 Solar Jul 04 13d21h30m1397 Lunar Jul 18 On Julian August 11 afternoon, a solar eclipse begins 20 minutes before sunset and it is still on going at sunset.
Fourteen days later (On Julian August 25) in the evening at sunset a lunar eclipse is already occurring.
If it was a man made story more than one events happened before 5000 years can't match interdependently. The Bhishma Parva and Udyoga Parva (specific chapters of Mahabharata) provide considerable astronomical/astrological descriptions and omens as the Mahabharata war was approaching.
It describes a period of draught, with many planetary positions.