p61 Herschel loop 2

p61 Herschel loop 2
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Pattern type	Oscillator
Number of cells	1596
Bounding box	381 × 70
Period	61 (mod: 61)
Heat	762.3
Volatility	0.92 | 0.92
Kinetic symmetry	Unspecified
Discovered by	Paul Callahan
Year of discovery	1997
Rules Outer-totalistic rules B3/S23 – B38/S23 # of rules 21 = 2 Isotropic rules B3/S23 – B38/S234c
Pattern files RLE p61herschelloop2.rle

p61 Herschel loop 2 is a period-61 Herschel loop oscillator found by Paul Callahan in February 1997, improving on David Buckingham's original p61 Herschel loop 1. It was the smallest oscillator of this period until the discovery of the Snark, and the smallest Herschel loop until the appearance of HRx65R.

It contains 40 Herschels travelling in a closed track composed of four copies of L112, six copies of Fx77 and ten copies of Fx153. It is an emu that makes heavy use of tub-with-tail eater to suppress all first natural gliders.

See also

• Period-61 glider gun