Roger W. Sinnott Oct 17 7:50 AM
Alessandro,
I don’t know what conventions are used by various online databases, but in standard chronological practice,
99 BC is the year -98 (not -99).
This is because there is no “0 BC”:
AD 3 year +3
AD 2 year +2
AD 1 year +1
1 BC year 0
2 BC year -1
3 BC year -2
. . . etc.
Roger
From: find_orb@yahoogroups.com [mailto:find_orb@yahoogroups.com] On Behalf Of alessandro odasso
Sent: Tuesday, October 15, 2013 4:19 PM
To: find_orb find_orb
Subject: [find_orb] Find_Orb - Before Christ MPCORB elements ?
. . .
1st test
I press the ephemeris button, and I choose a date 99 years B.C.
So I write 99 with a menus sign:
-99-Jan-01
I choose MPCORB elements and that's fine. After very little, I get the result.