Rotation Period in 2012-13 Apparition(NNTD2)

Object	NNTZ dark spot	ID	NNTD2

Period	p1	Data Count	8
Rotation Period	9h56m18.2s±11.8s	Refernce Date	2012/12/03
Drift Rate (deg./day)	+0.914±0.288	Refernce Longitude	352.8±2.0
Limiting Date	2013/01/02－2013/01/16	Latitude	+39.8±0.7
Limiting Longitude	17.6－32.1	Wind Velocity (m/sec)	-12.8±3.1

Period	p2	Data Count	14
Rotation Period	9h55m21.4s±3.9s	Refernce Date	2012/12/03
Drift Rate (deg./day)	-0.469±0.095	Refernce Longitude	52.2±1.2
Limiting Date	2013/01/19－2013/02/14	Latitude	+40.5±0.8
Limiting Longitude	30.8－18.2	Wind Velocity (m/sec)	+2.2±1.0

Period	p3	Data Count	9
Rotation Period	9h55m54.9s±4.3s	Refernce Date	2012/12/03
Drift Rate (deg./day)	+0.348±0.104	Refernce Longitude	352.1±1.1
Limiting Date	2013/02/19－2013/03/13	Latitude	+39.9±0.6
Limiting Longitude	19.2－27.6	Wind Velocity (m/sec)	-6.6±1.1

No.	Date	Time	Longitude	Sys.	PCF	Object	Location	Latitude	Observer	Est. Longitude	Error
1	2013/01/02	10:41	17.6	2	C	D SPOT	NNTZ	+39.2	Miyazaki, Isao	20.6	-3.0
2	2013/01/04	13:05	22.6	2	C	D SPOT	NNTZ	+38.8	Einaga, Hideo	22.6	0.0
3	2013/01/05	10:27	23.2	2	C	D SPOT	NNTZ	+39.2	Iwamasa, Ryuichi	23.4	-0.2
4	2013/01/06	14:09	27.1	2	C	D SPOT	NNTZ	+40.3	Einaga, Hideo	24.4	+2.7
5	2013/01/09	13:05	29.2	2	C	D SPOT	NNTZ	+39.4	Einaga, Hideo	27.1	+2.1
6	2013/01/11	13:52	29.9	2	C	D SPOT	NNTZ	+40.2	Yoshida, Tomoyuki	29.0	+0.9
7	2013/01/15	08:36	31.4	2	C	D SPOT	NNTZ	+40.6	Einaga, Hideo	32.4	-1.0
8	2013/01/16	13:08	32.1	2	C	D SPOT	NNTZ	+40.5	Yoshida, Tomoyuki	33.5	-1.4
9	2013/01/19	11:49	30.8	2	C	D SPOT	NNTZ	+40.2	Kozawa, Tokujiro	29.9	+0.9
10	2013/01/19	12:13	29.2	2	C	D SPOT	NNTZ	+41.8	Iwamasa, Ryuichi	29.9	-0.7
11	2013/01/23	13:33	26.4	2	C	D SPOT	NNTZ	+40.5	Einaga, Hideo	28.0	-1.6
12	2013/01/29	08:58	24.9	2	C	D SPOT	NNTZ	+40.4	Kozawa, Tokujiro	25.3	-0.4
13	2013/01/31	10:57	25.4	2	C	D SPOT	NNTZ	+41.6	Go, Christopher	24.3	+1.1
14	2013/01/31	10:25	26.0	2	C	D SPOT	NNTZ	+41.0	Kozawa, Tokujiro	24.3	+1.7
15	2013/01/31	09:57	25.4	2	C	D SPOT	NNTZ	+40.8	Yoneyama, Seiichi	24.3	+1.1
16	2013/02/02	12:33	23.9	2	C	D SPOT	NNTZ	+40.4	Einaga, Hideo	23.3	+0.6
17	2013/02/03	08:35	22.6	2	C	D SPOT	NNTZ	+41.3	Einaga, Hideo	22.9	-0.3
18	2013/02/07	10:16	18.4	2	C	D SPOT	NNTZ	+39.1	Einaga, Hideo	21.0	-2.6
19	2013/02/09	11:47	19.9	2	C	D SPOT	NNTZ	+39.8	Yamazaki, Akihiro	20.1	-0.2
20	2013/02/10	09:03	18.7	2	C	D SPOT	NNTZ	+40.2	Einaga, Hideo	19.6	-0.9
21	2013/02/14	11:29	18.5	2	C	D SPOT	NNTZ	+39.3	Kozawa, Tokujiro	17.7	+0.8
22	2013/02/14	12:09	18.2	2	C	D SPOT	NNTZ	+40.3	Miyazaki, Isao	17.7	+0.5
23	2013/02/19	20:49	19.6	2	C	D SPOT	NNTZ	+40.6	Delcroix, Marc	19.6	0.0
24	2013/02/19	11:24	20.1	2	C	D SPOT	NNTZ	+40.2	Einaga, Hideo	19.4	+0.7
25	2013/02/21	12:25	19.2	2	C	D SPOT	NNTZ	+41.1	Einaga, Hideo	20.1	-0.9
26	2013/02/21	12:32	21.0	2	C	D SPOT	NNTZ	+40.0	Miyazaki, Isao	20.1	+0.9
27	2013/02/27	09:02	20.4	2	C	D SPOT	NNTZ	+39.7	Einaga, Hideo	22.2	-1.8
28	2013/03/03	10:57	25.1	2	C	D SPOT	NNTZ	+39.0	Einaga, Hideo	23.6	+1.5
29	2013/03/08	10:23	24.2	2	C	D SPOT	NNTZ	+39.8	Ota, Satoshi	25.3	-1.1
30	2013/03/10	11:57	26.2	2	C	D SPOT	NNTZ	+39.6	Miyazaki, Isao	26.0	+0.2
31	2013/03/13	10:09	27.6	2	C	D SPOT	NNTZ	+39.5	Ota, Satoshi	27.1	+0.5