Small period-5 oscillators

All known period-5 oscillators (not counting stator variants) that have one phase of less than 29 "on" cells. It is confirmed that pseudo-barberpole is the smallest p5 oscillator.

Rank	Signature	Name apgcode	Image	Cells	Rotor size	Volat.	FC
1	15-17-17-25-17	Pseudo-barberpole xp5_y2g0k413zwo0a02z32		15	28	.82
2	16-24-16-24-24	Octagon 2 xp5_idiidiz01w1		16	32	.80	29.3
3	17-20-19-21-19	Silver's p5 xp5_wftsw6246z32		17	19	.63
4	18-22-18-22-22	Fumarole xp5_3pmwmp3zx11		18	26	.72	35.8
5	20-20-22-22-28	Pentoad xp5_y4ca23zwgg3226z6221		20	22	.64
6	20-21-22-26-21	Elkies' p5 xp5_2mq3sggozx346		20	16	.55	44.7
7	21-21-22-22-24	Hooks xp5_32aczxogf2c84c		21	11	.39
8	23-24-29-27-33	Pentoad 1H2 xp5_0jrz3210o88czy46a8o		23	38	.79
9	26-26-30-30-40	Pentoad with two hexominoes xp5_y8ca23zy0gx3226zw8o1113z311		26	38	.76
10	26-28-26-28-28	Heart xp5_giligz36asgv04a4		26	18	.50
11	26-28-36-32-38	Pentoad 2 xp5_0jrz3210o88czy5e53zy533		26	54	.87
12	28-28-29-29-32	Pentant xp5_g0giegmp3z11074x6a8o		28	10	.28
13	28-28-30-30-32	Hooks dimer xp5_0dbz65123fc48a6zy4db		28	16	.42
14	28-28-31-34-33	unnamed xp5_xc48oi13zy0ssz0n13z123		28	45	.79
15	28-30-44-34-34	Scot's p5 xp5_4j8qa606aq8j4zx26x62		28	62	.93
16	28-32-32-48-32	Nivasch's pseudo-barberpole xp5_03168gxg8a6z0gg8450dhz32y3346		28	52	.81
17	28-35-31-32-33	5blink xp5_6a8w7zwor3sn52z04a511		28	42	.76

Signatures are the population counts for the oscillator, sequenced so that the lowest numbers appear to the left. The first signature number has three digits to facilitate sorting when a table includes larger oscillators. Signature numbers are used to break ties in oscillators of nearly the same size.