jwposter:
In my astronomy program however, it doesn't have a year zero, so I
researched year 511 BC. And seen enough to know that it was a match to
the Tablet VAT4956.
The solstice in 512 BCE was on 29 June (Julian calendar). This solidly identifies where the other observations must fit on the Julian calendar, irrespective of the date on which the Neo-Babylonian calendar might have begun for that year (since the person who started this thread obviously does not recognise the dates assigned by scholars for the Neo-Babylonian calendar). Line 16 on the front of VAT 4956 identifies the solstice on 9 Simanu. The same line says early in the next night, the moon was visible 3.5 cubits above α scorpii. It wasn't. The moon was below the horizon (in Cancer) and nowhere near Scorpio.
Lines 12-14 on the front indicate observations including the moon being in Cancer, along with specific descriptions about the positions of Mercury, Mars, Venus and Jupiter (in Scorpio) during Simanu, prior to the 5th evening of that month. There is no possible match for those observations in 512 BCE. During the required interval, the moon was nowhere near Cancer; Mercury and Jupiter were never both observable together in the required period, Jupiter was always below the horizon when Mercury was observable at night, and Jupiter was in Leo.
Well that was easy. I'm not convinced this person has verified anything about VAT 4956 in an astronomy program, and it is not worth expending the effort to continue checking the other observations in the tablet.