55P9H3V0

	55P9H3V0
	<a href="/wiki/File:55p9h3v0.png" class="image" title="55P9H3V0 image"><img alt="55P9H3V0 image" src="/w/images/2/23/55p9h3v0.png" decoding="async" width="256" height="256" /></a>
	<a href="/wiki/File:55p9h3v0.png" class="image" title="55P9H3V0 image"><img alt="55P9H3V0 image" src="/w/images/2/23/55p9h3v0.png" decoding="async" width="256" height="256" /></a>
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Pattern type	Spaceship
Number of cells	55
Bounding box	21 × 13
Direction	Orthogonal
Period	9
Mod	9
Speed	c/3
Speed (unsimplified)	3c/9
Heat	40.4
Discovered by	Paul Tooke
Year of discovery	2001
Rules
Outer-totalistic rules	B3/S23 – B38/S23678
Important rules	Conway Life
# of rules	24 = 16
Isotropic rules	B3/S23-k – B2n34ez5ej6aek7c8/S234acw5-ejy678
Glider synthesis
Fewest gliders	231†
Catagolue-generated RLE	55p9h3v0_synth.rle
	†Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files
Plaintext	55p9h3v0.cells
RLE	55p9h3v0.rle
Identifiers
apgcode	xq9_8k64a2151u0u1512a46k8zy43gbg3zy24b3x3b4

55P9H3V0 is a c/3 orthogonal spaceship discovered by Paul Tooke in June 2001. It is the smallest known spaceship with an unsimplified speed of 3c/9. On September 19, 2020, Goldtiger997 found a 271-glider synthesis for this spaceship, making it the first period-9 spaceship to be synthesized.^[1]

References

↑ Goldtiger997 (September 19, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums