List of slow rotators (minor planets)
# Minor planet designation Rotation period ( hours ) Δ mag Quality ( U ) Orbit or family Spectral type Diameter ( km ) Abs . mag ( H ) Refs
107 ( 223665 ) 2004 PH 37 397.2 0.58 2 Eunomia S 1.59 16.30 LCDB · List
108 21432 Polingloh 393 0.73 2 Flora S 1.52 16.25 LCDB · List
109 ( 76800 ) 2000 OQ 35 392 1.40 3 Hungaria E 2.54 14.90 LCDB · List
110 22905 Liciniotoso 389.6 0.42 2 Flora S 2.50 15.18 LCDB · List
111 ( 172537 ) 2003 UH 27 386.9 0.62 2 Flora S 0.98 17.20 LCDB · List
112 ( 108163 ) 2001 HA 6 383.5 0.71 2 Eunomia S 3.01 14.92 LCDB · List
113 ( 192309 ) 1993 TK 26 383.3 0.80 2 MBA ( outer ) C 3.38 16.08 LCDB · List
114 ( 31182 ) 1997 YZ 3 380 0.90 2 Hungaria E 2.30 14.80 LCDB · List
115 10331 Peterbluhm 379 1.10 2 Hilda C 23.21 11.90 LCDB · List
116 ( 252079 ) 2000 SY 306 376 0.74 2 Flora S 0.94 17.31 LCDB · List
117 ( 184616 ) 2005 RE 11 375.4 0.86 2 Eos S 2.88 15.46 LCDB · List
118 ( 13331 ) 1998 SU 52 375 0.80 3− Jupiter trojan C 29.21 11.40 LCDB · List
119 ( 15529 ) 2000 AA 80 375 0.59 2 Jupiter trojan C 29.21 11.40 LCDB · List
120 1750 Eckert 375 0.87 3− Hungaria S 6.97 13.15 LCDB · List
121 ( 18058 ) 1999 XY 129 374.8 0.58 2 Jupiter trojan C 18.30 12.42 LCDB · List
122 5075 Goryachev 373 1.00 2 Nysa S 5.28 13.70 LCDB · List
123 8026 Johnmckay 372 1.00 3 Hungaria E 2.54 14.90 LCDB · List
124 ( 106723 ) 2000 WE 179 368.5 0.74 2 MBA ( outer ) C 4.29 15.57 LCDB · List
125 5851 Inagawa 367.5 0.90 3 Eunomia S 9.60 12.40 LCDB · List
126 ( 14920 ) 1994 PE 33 367.1 0.54 2 Flora S 3.53 14.43 LCDB · List
Periods of 300+ hours
This is a list of slow rotators - minor planets that have an exceptionally long rotation period. This period, typically given in hours, and sometimes called rotation rate or spin rate, is a fundamental standard physical property for minor planets. In recent years, the periods of many thousands of bodies have been obtained from photometric and, to a lesser extent, radiometric observations. The periods given in this list are sourced from the Light Curve Data Base (LCDB), which contains lightcurve data for more than 15,000 bodies. Most minor planets have rotation periods between 2 and 20 hours. , a group of approximately 650 bodies, typically measuring 1-20 kilometers in diameter, have periods of more than 100 hours or 4 days. Among the , there are currently 15 bodies with a period longer than 1000 hours. According to the Minor Planet Center, the sharp lower limit of approximately 2.2 hours is due to the fact that most smaller bodies are thought to be rubble piles - conglomerations of smaller pieces, loosely coalesced under the influence of gravity - that fly apart if the period is shorter than this limit. The few minor planets rotating faster than 2.2 hours, therefore, can not be merely held together by self-gravity, but must be formed of a contiguous solid. As with orbital periods, a rotational period can be sidereal or synodic to describe a full rotation with respect to the fixed stars (sidereal) and Sun (synodic), respectively. In most cases, the periods given in this list are synodic, not sidereal. However, in most cases the difference between these two different measures is not significant.