Rotation Period in 2018 Apparition(STRD4)

Object	STrZ dark spot	ID	STRD4

Period	p1	Data Count	25
Rotation Period	9h55m27.4s±5.5s	Refernce Date	2018/05/09
Drift Rate (deg./day)	-0.323±0.134	Refernce Longitude	296.7±1.3
Limiting Date	2018/03/13－2018/04/02	Latitude	-23.7±1.1
Limiting Longitude	314.3－306.2	Wind Velocity (m/sec)	+0.7±1.8

Period	p2	Data Count	15
Rotation Period	9h55m54.6s±5.2s	Refernce Date	2018/05/09
Drift Rate (deg./day)	+0.341±0.126	Refernce Longitude	314.0±1.0
Limiting Date	2018/04/08－2018/04/24	Latitude	-22.5±1.2
Limiting Longitude	304.0－311.8	Wind Velocity (m/sec)	-8.0±1.7

No.	Date	Time	Longitude	Sys.	PCF	Object	Location	Latitude	Observer	Est. Longitude	Error
1	2018/03/13	19:17	313.0	2	C	D PROJ	SEB-S	-21.4	Horiuchi, Tadashi	314.8	-1.8
2	2018/03/13	19:42	313.1	2	C	D PROJ	SEB-S	-22.0	Go, Christopher	314.8	-1.7
3	2018/03/13	19:21	312.9	2	C	D PROJ	SEB-S	-22.6	Miyazaki, Isao	314.8	-1.9
4	2018/03/15	20:47	314.3	2	C	D PROJ	SEB-S	-21.7	Go, Christopher	314.2	+0.1
5	2018/03/16	18:35	314.2	2	C	D COL	STRZ	-22.9	Ohsugi, Tadao	313.9	+0.3
6	2018/03/18	18:22	313.5	2	C	D COL	STRZ	-23.0	Go, Christopher	313.2	+0.3
7	2018/03/18	19:48	313.4	2	C	D COL	STRZ	-22.8	Miyazaki, Isao	313.2	+0.2
8	2018/03/20	00:20	314.2	2	C	D SPOT	STRZ	-23.8	Foster, Clyde	312.8	+1.4
9	2018/03/20	20:04	314.3	2	C	D COL	STRZ	-23.5	Go, Christopher	312.6	+1.7
10	2018/03/23	07:12	312.9	2	C	D COL	STRZ	-22.8	Carvalho, Fabio	311.8	+1.1
11	2018/03/23	16:49	312.1	2	C	D COL	STRZ	-23.7	Einaga, Hideo	311.7	+0.4
12	2018/03/23	19:04	312.7	2	C	D COL	STRZ	-23.0	Miyazaki, Isao	311.6	+1.1
13	2018/03/25	19:09	312.4	2	C	D SPOT	STRZ	-24.5	Einaga, Hideo	311.0	+1.4
14	2018/03/25	19:50	312.3	2	C	D SPOT	STRZ	-24.5	Kumamori, Teruaki	311.0	+1.3
15	2018/03/26	15:43	309.1	2	C	D SPOT	STRZ		Horikawa, Kuniaki	310.7	-1.6
16	2018/03/27	20:16	312.2	2	C	D SPOT	STRZ	-25.7	Miyazaki, Isao	310.3	+1.9
17	2018/03/28	16:35	311.3	2	C	D SPOT	STRZ	-24.4	Yamazaki, Akihiro	310.0	+1.3
18	2018/03/28	17:25	310.2	2	C	D SPOT	STRZ	-24.9	Kumamori, Teruaki	310.0	+0.2
19	2018/03/28	17:51	310.9	2	C	D SPOT	STRZ	-24.0	Wesley, Anthony	310.0	+0.9
20	2018/03/30	18:50	309.1	2	C	D SPOT	STRZ	-24.8	Horiuchi, Tadashi	309.4	-0.3
21	2018/03/30	18:57	309.1	2	C	D SPOT	STRZ	-24.9	Olivetti, Tiziano	309.4	-0.3
22	2018/04/01	19:08	306.2	2	C	D SPOT	STRZ	-24.4	Go, Christopher	308.7	-2.5
23	2018/04/01	20:28	308.1	2	C	D SPOT	STRZ	-24.5	Miyazaki, Isao	308.7	-0.6
24	2018/04/02	16:50	307.0	2	C	D SPOT	STRZ	-24.4	Kumamori, Teruaki	308.4	-1.4
25	2018/04/02	17:21	307.1	2	C	D SPOT	STRZ	-24.5	Horiuchi, Tadashi	308.4	-1.3
26	2018/04/08	19:50	304.7	2	C	D SPOT	STRZ	-24.2	Olivetti, Tiziano	303.7	+1.0
27	2018/04/09	16:17	304.9	2	C	D SPOT	STRZ	-23.8	Go, Christopher	304.0	+0.9
28	2018/04/09	17:03	304.0	2	C	D SPOT	STRZ	-23.4	Einaga, Hideo	304.0	0.0
29	2018/04/11	18:25	304.5	2	C	D SPOT	STRZ	-23.6	Olivetti, Tiziano	304.7	-0.2
30	2018/04/14	15:46	305.2	2	C	D SPOT	STRZ	-23.3	Go, Christopher	305.7	-0.5
31	2018/04/16	17:02	305.5	2	C	D SPOT	STRZ	-22.3	Go, Christopher	306.4	-0.9
32	2018/04/18	18:36	307.4	2	C	D SPOT	STRZ	-23.5	Miyazaki, Isao	307.1	+0.3
33	2018/04/19	15:06	306.1	2	C	D SPOT	STRZ	-23.4	Suzuki, Takashi	307.4	-1.3
34	2018/04/20	01:02	306.7	2	C	D SPOT	STRZ	-21.6	Foster, Clyde	307.6	-0.9
35	2018/04/21	17:01	308.0	2	C	D SPOT	STRZ	-22.5	Horiuchi, Tadashi	308.1	-0.1
36	2018/04/21	16:29	307.7	2	C	D SPOT	STRZ	-22.2	Go, Christopher	308.1	-0.4
37	2018/04/22	13:47	307.4	2	C	D SPOT	STRZ	-22.4	Einaga, Hideo	308.4	-1.0
38	2018/04/22	22:21	308.9	2	C	D SPOT	STRZ	-21.3	Foster, Clyde	308.5	+0.4
39	2018/04/23	17:13	309.2	2	C	D SPOT	STRZ	-20.4	Go, Christopher	308.8	+0.4
40	2018/04/24	23:24	311.8	2	C	D SPOT	STRZ	-20.3	Foster, Clyde	309.2	+2.6