Period-10 sparkers

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This is a list of known period-10 sparkers. Most were found with dr, which doesn't care about the period, and you get whatever you get.

x = 21, y = 9, rule = B3/S23 3b2o11b2o$b3ob2ob2ob2ob2ob3o$o8bobo8bo$b5obobobobob5o$6b2obobob2o$3b2o 5bo5b2o$3bo13bo$4bo11bo$3b2o11b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
55P10. By far the most useful dot sparker. It is a double middleweight sparker. It can be reduced by two rows (height 8 instead of 10) if bounding box is a concern, or the two halves can be skewed by two cells if clearance is a concern.
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RLE: here Plaintext: here
x = 34, y = 17, rule = B3/S23 16b2o2$13bo6bo$12bo8bo$13b8o3$8b2o14b2o$2b2o4b6o6b6o4b2o$2b3o5b5o4b5o 5b3o$b2o2b2o2bo3bobo2bobo3bo2b2o2b2o$o2b2obob3obo2b4o2bob3obob2o2bo$2o bo2bobo2bobo6bobo2bobo2bob2o$3bob2ob2obob8obob2ob2obo$3bo2bo2bobo10bob o2bo2bo$4bobo2bobob4o2b2obobo2bobo$5bo4b2obo2bo2b2ob2o4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
p10 domino fountain. By far the most useful domino sparker. It has extremely good clearance and decent fallback, although the oscillator itself is much larger than 55P10. (click above to open LifeViewer)
RLE: here Plaintext: here
x = 16, y = 12, rule = B3/S23 11b2ob2o$7bobo2bobo$9bo2bobo$4bo5bob2o$4bo3b3o$11b3o$2obobob2obo2bo$ob 2obobo3b2o$5b2o2b2o$b4o5bo$bo2bo4bo$9b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
p10 filter, named because it can double the period of a period 10N+5 stream, deleting every second glider. This is not its only use.
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RLE: here Plaintext: here
x = 14, y = 12, rule = B3/S23 2b2o$2bo$3b4obo$5b2o2bo$b4o$o4b2o$b3o2bobobo$3b2o3bob3o$7b2o4bo$8bob3o $8bobo$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
p10 duoplet sparker
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RLE: here Plaintext: here
x = 19, y = 19, rule = B3/S23 11bo$11bobo$10bobo$12bo2$10bo6bo$6b2obobo3b2o$6b2o2bobo4b2o$11bobo2bo$ 12bo$bo4b2o$bobo2bobo2b2o$obo4b2o2b2o$2bo2$7bo$5b2o$7b2o$6bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
46P10, used as a corner dot sparker.
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RLE: here Plaintext: here
#O Matthias Merzenich, November 12, 2010 #C The smallest known non-trivial period-10 oscillator. x = 13, y = 9, rule = B3/S23 7b2o4b$7bo2bo2b$3bo4bo3bo$4b2o3bob2o2$2obo3b2o4b$o3bo4bo3b$2bo2bo7b$4b 2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
24P10. Only useful in LCM oscillators. See 24P10 on 30P25 for the correct spot to use for interaction.
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RLE: here Plaintext: here
x = 15, y = 12, rule = B3/S23 2b2o3bo3b2o$2bobo5bobo$obo9bobo$2obo7bob2o$3bob2ob2obo$2obobo3bobob2o$ o2bob5obo2bo$2bo9bo$3b9o2$5b2ob2o$5b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
p10 lone dot sparker, found by Matthias Merzenich on February 19, 2022. Much less clearance than 55P10, but the lack of side sparks could allow it to work in a situation that 55P10 doesn't. No uses have been found yet, though.
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RLE: here Plaintext: here
x = 40, y = 31, rule = B3/S23 12bo7bo6bo$11bobo8bo3bobo$b2o4b3obo5bo4bo5bob3o4b2o$bo2bo10b2o6b2o10bo 2bo$2b4o4b2o3b2o6b2o3b2o4b4o$5bobob3o5bo4bo5b3obobo$2b5obo8bo13bob5o$ 2bo3bo4b2o6bo7b2o4bo3bo$5b2obob3o14b3obob2o$5bobobobo16bobobobo$6bo2bo 20bo2bo$2o7b2o18b2o7b2o$o2bobo2b2o20b2o2bobo2bo$b2ob2o3bo20bo3b2ob2o$ 2bo3b2o24b2o3bo$o2b4o26b4o2bo$2obo3bobo20bobo3bob2o$bobo2b2o24b2o2bobo $o2b2ob2o24b2ob2o2bo$obo2bo3bo20bo3bo2bobo$bobob4obo18bob4obobo$3bo6bo 18bo6bo$3bo3b2ob2o16b2ob2o3bo$b2ob2obobo20bobob2ob2o$2bobo2bobo20bobo 2bobo$2bo4bob2o18b2obo4bo$obo2bo2bo2bo16bo2bo2bo2bobo$2ob2ob2o2b2o16b 2o2b2ob2ob2o$3bobo28bobo$3bobo28bobo$4bo30bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 5 THUMBSIZE 2 ]]
p10 sandwich hassler and half-middleweight sparker
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RLE: here Plaintext: here

See also