Monday

Perseid in the Calendar Sky (Peak 11 & 12)

-Posted by D. Worth (US) | for- M. Barbay (France)

Dust streaks 132 thousand miles an hour cross the sky, from the constellation Perseus... As rainbow fireworks (Perseid) fall inward, toward our sun.
Image: Just (r) from the Milky Way.



When Perseid rises in the N. East, away from the lunar glare; it will be 2am August 12th... And precisely the best time to view the Perseid earth grazers. The fixed constellation, in the Zodiac, is Sagittarius...

VIDEO: Basic at first, but becomes interesting...
Photographic Guide to the Constellations: Here.


Under perfect conditions, observers can expect to see about 90 to 100 meteors an hour. Read: National Geographic. It was the ancient Chinese who first documented this shower in the year 36...

Note: The 'traditional' maximum timing would be best-viewed from places in and around the northern Pacific Ocean, including the extreme west of North America west as far as extreme eastern Japan and China, assuming it happens as expected. Read.
Chandra Animation of Black Hole in Perseus Cluster (Quicktime)
Low Res (1.1 MB)

Perseus
SN 2006gy (2007)Perseus Cluster (2005)
Perseus Cluster (2003)Perseus A (2000)


Peaks 11th and 12th:
Active: July 17 — August 24;

Maximum: August 12/11h30m — 14h00m UT (λsol = 140°0 — 140°1)
ZHR = 100
Radiant: α = 49° δ = +58°
Radiant drift:
vinf = 59 km/s; r = 2.6
TFC: α = 019° δ = +38° and α = 348° δ = +74° before 2h local time
α = 043° δ = +38° and α = 073° δ = +66° after 2h local time (β > 20° N)
IFC: α = 300° δ = +40° and α = 000° δ = +20° or
α = 240° δ = +70° (β > 20° N)


VIDEO: -Calendar Sky of Ancient History: Here.




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