Reread before you sign.
Not because a planet is watching, but because rereading is cheap and the cost of not rereading is not. If a three-week window is what makes you do it, the window earned its keep.
Geocentric tropical longitude · refined to the minute
No. Mercury is direct. The next retrograde runs from October 24, 2026 to November 13, 2026, beginning at 20°59' in Scorpio in 35 days.
Not the only one
Measured at the midpoint of the October 24 – November 13, 2026 retrograde. Mercury gets the headlines because its period is short and frequent; the slower planets are retrograde for months at a time and pass unnoticed.
Open the full trackerThe part the date lists leave out
Mercury does not stop and reverse. It slows, appears to travel backward against the zodiac for about three weeks, then slows again and resumes. What that leaves behind is an arc of sky it crosses three times: forward to the degree it will turn back from, backward across that arc, and forward over the same ground again.
That three-pass arc is the shadow. It is why the period readers describe rarely matches the dates they were given — the published three weeks sit in the middle of roughly eight.
57 days from shadow to shadow, of which 20 are retrograde. Mercury covers 15.9° of Scorpio in each direction.
Both shadow edges have to be solved for: the date Mercury first reaches the degree it will later station direct at, and the date it regains the degree it stationed retrograde at. Neither can be read from a table, which is why most sites do not publish them.
Every period, computed
Station instants in UTC, the zodiac degree each station falls at, and both shadow edges. A station at 07:07 UTC is the previous evening in the Americas — that difference is where most date disagreements between sites come from.
What to do with it
No study has found that Mercury's apparent direction affects contracts, devices, travel, or conversations. Nothing here needs to be postponed. What the period is genuinely useful for is the habit it suggests.
Not because a planet is watching, but because rereading is cheap and the cost of not rereading is not. If a three-week window is what makes you do it, the window earned its keep.
Times, places, who is bringing what. Most of what gets blamed on Mercury is an arrangement two people remembered differently and neither checked.
The traditional reading of a retrograde is review, not launch. Treat it as permission to close open work instead of a reason to delay something that is ready.
Mercury is retrograde roughly three weeks in nine. A rule that stops you acting for a fifth of your life is not caution, and no astrologer worth reading will tell you otherwise.
Check it yourself
Mercury's apparent geocentric tropical longitude is compared either side of a sample. Where the direction changes, the crossing is narrowed by binary search until it resolves to the minute, which is why a station here carries a timestamp rather than a whole-day label.
Shadow edges use the same method against a fixed target longitude: the pre-shadow is the instant Mercury first reaches the degree it will later station direct at, the post-shadow the instant it regains the degree it stationed retrograde at. The full model, sources and tolerances are on How we calculate; every planetary position for any date is in Today's sky.
Make it personal
Mercury turning back at 20°59' in Scorpio means nothing in the abstract. It means something when you know which house of your own chart that degree sits in, and what it touches there.
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