Rotation Period in 2021-22 Apparition(STJ13)

Object	STBn jetstream spot	ID	STJ13

Period	p1	Data Count	12
Rotation Period	9h54m43.5s±0.9s	Refernce Date	2021/08/20
Drift Rate (deg./day)	-1.394±0.022	Refernce Longitude	248.1±0.4
Limiting Date	2021/07/13－2021/08/16	Latitude	-24.1±0.3
Limiting Longitude	300.1－252.6	Wind Velocity (m/sec)	+14.7±0.3

Period	p2	Data Count	15
Rotation Period	9h54m18.5s±7.5s	Refernce Date	2021/08/20
Drift Rate (deg./day)	-2.003±0.184	Refernce Longitude	243.0±3.1
Limiting Date	2021/08/18－2021/09/21	Latitude	-24.6±0.4
Limiting Longitude	248.3－184.8	Wind Velocity (m/sec)	+22.6±2.4

No.	Date	Time	Longitude	Sys.	PCF	Object	Location	Latitude	Observer	Est. Longitude	Error
1	2021/07/13	17:58	300.1	2	C	D SPOT	STRB	-24.1	Miyazaki, Isao	300.1	0.0
2	2021/07/20	19:03	290.7	2	C	D SPOT	STRB	-24.2	Ishibashi, Tsutomu	290.2	+0.5
3	2021/07/23	16:23	285.8	2	C	D SPOT	STRB	-24.2	Suzuki, Kunihiko	286.2	-0.4
4	2021/07/30	16:20	276.4	2	C	D PROJ	STRB	-24.1	Miyazaki, Isao	276.5	-0.1
5	2021/07/30	15:17	276.4	2	C	D SPOT	STRB	-23.3	Ota, Satoshi	276.5	-0.1
6	2021/07/31	13:10	274.9	2	C	D SPOT	STRB	-23.7	Suzuki, Kunihiko	275.2	-0.3
7	2021/08/04	16:02	269.4	2	C	D SPOT	STRB	-24.0	Kumamori, Teruaki	269.5	-0.1
8	2021/08/06	16:33	267.1	2	C	D SPOT	STRB	-24.4	Suzuki, Kunihiko	266.7	+0.4
9	2021/08/11	15:19	260.2	2	C	D SPOT	STRB	-24.4	Go, Christopher	259.8	+0.4
10	2021/08/14	14:25	255.2	2	C	D SPOT	STRB	-23.9	Miyazaki, Isao	255.7	-0.5
11	2021/08/16	14:09	252.6	2	C	D SPOT	STRB	-24.2	Ota, Satoshi	252.9	-0.3
12	2021/08/16	16:06	253.2	2	C	D SPOT	STRB	-24.4	Miyazaki, Isao	252.8	+0.4
13	2021/08/18	16:58	248.3	2	C	D SPOT	STRB	-24.3	Suzuki, Kunihiko	245.6	+2.7
14	2021/08/19	13:05	246.8	2	C	D SPOT	STRB	-24.4	Ishibashi, Tsutomu	243.9	+2.9
15	2021/08/21	14:24	242.0	2	C	D SPOT	STRB	-24.9	Go, Christopher	239.8	+2.2
16	2021/08/23	15:11	236.4	2	C	D SPOT	STRB	-25.0	Ota, Satoshi	235.7	+0.7
17	2021/08/25	15:29	231.9	2	C	D SPOT	STRB	-24.8	Miyazaki, Isao	231.7	+0.2
18	2021/08/26	13:16	230.6	2	C	D SPOT	STRB	-25.2	Miyazaki, Isao	229.9	+0.7
19	2021/08/30	16:03	219.7	2	C	D SPOT	STRB	-25.2	Miyazaki, Isao	221.6	-1.9
20	2021/09/01	16:37	214.5	2	C	D SPOT	STRB	-24.8	Miyazaki, Isao	217.6	-3.1
21	2021/09/02	13:08	213.0	2	C	D SPOT	STRB	-24.9	Miyazaki, Isao	215.9	-2.9
22	2021/09/04	13:55	208.0	2	C	D SPOT	STRB	-24.7	Go, Christopher	211.8	-3.8
23	2021/09/06	15:29	204.1	2	C	D SPOT	STRB	-24.7	Miyazaki, Isao	207.6	-3.5
24	2021/09/09	13:44	198.7	2	C	D SPOT	STRZ	-24.9	Ito, Satoshi	201.8	-3.1
25	2021/09/16	13:10	188.3	2	C	D SPOT	STRB	-24.2	Miyazaki, Isao	187.8	+0.5
26	2021/09/18	15:27	185.7	2	C	D SPOT	STRZ	-23.9	Miyazaki, Isao	183.6	+2.1
27	2021/09/21	03:43	184.8	2	C	D SPOT	STRZ	-23.8	Lamy, George	178.6	+6.2