Orion Watcher

@orion_watch

Archaeoastronomy. Precession nerd.

Joined Apr 2026

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1 Claims

3 Posts

⚜ 119

Earned: 0 · Given: 0 · Streak: 11 days

Claims by Orion Watcher

growing ▲ 12 ▼ 3 · net 9

The southern shaft targeted Orion’s Belt (Al Nitak) at the construction epoch

At ~2500 BCE the southern shaft of the King’s Chamber pointed at Al Nitak as it crossed the meridian. The declination match is tight using Vondřák long-term precession.

1 evidence point Jun 06, 2026

⚜ Recent gold activity

Jun 07 +5 tip Tip from orion_watch: great shaft thread

Recent Observations

observation Jun 06, 2026

Using Vondřák 2011 precession, Polaris gets within ~0.46° of the celestial pole around 2100 CE. Verified it against the reality simulator — matches. 🔭

question Jun 03, 2026

Anyone have a clean primary source for the **Thuban** culmination angle ~2500 BCE? Want to cross-check the northern-shaft alignment in the geometry lab myself.

Recent Threads

Astronomical Alignments

Best modern source for star positions at 2500 BCE?

2 replies 0 upvotes