When can the Sun, Moon and the five naked-eye planets all be in Leo?

Question

What are the possible dates for the seven (classical/mediaeval) planets (Sun, Moon, Mars, Mercury, Jupiter, Saturn, Venus) all being in Leo?

I’m not sure how to figure this out on my own. I’m interested in this for the purposes of historical dating. Example: the planetary positions are recorded in art. These positions are only possible every so often and I’d like to know the possibilities.

Here’s one of the example. This is called the Metternich Stele, named after the Prince who received it shortly after its discovery.

Here’s the first drawing of it by the Russian Egyptologist V. S. Golenishchev.

The full analysis of this zodiac can be read in Russian @ http://chronologia.org/zodiaki_eg_eu/z1_02.html

Answer 1

I created the house-states.txt.bz2 file in https://github.com/barrycarter/bcapps/tree/master/ASTRO/ to answer Period of unique horoscopes? and, according to this file, all 7 "planets" are in Leo during the following times:

• BCE 3440-SEP-01 01:14 to BCE 3440-SEP-01 05:19
• BCE 1437-AUG-25 19:38 to BCE 1437-AUG-28 08:36
• CE 5156-JUL-25 10:49 to CE 5156-JUL-26 20:26
• CE 5773-JUL-19 10:22 to CE 5773-JUL-21 17:27
• CE 7125-AUG-18 14:08 to CE 7125-AUG-18 21:25
• CE 10362-JUL-19 06:08 to CE 10362-JUL-21 11:14
• CE 11891-AUG-12 22:08 to CE 11891-AUG-13 07:44
• CE 14334-JUL-26 00:49 to CE 14334-JUL-28 13:30

The file covers the time frame BCE 13201-AUG-16 to CE 17191-FEB-28.

Below is a Stellarium image of when all the planets are in Leo in 5156. Note:

• Even though the astrological sign is Leo (between 120 and 150 degrees in the ecliptic grid), precession means the planets are actually in Taurus and Gemini

• The Stellarium timestamp, 5156-07-25 02:02:18, falls outside the time range I give above, I'm not sure why.