Rotation Period in 2018 Apparition(NTCBD25)

Object	NTBn dark spot	ID	NTCBD25

Period		Data Count	29
Rotation Period	9h54m18.2s±1.5s	Refernce Date	2018/05/09
Drift Rate (deg./day)	-2.011±0.037	Refernce Longitude	276.9±1.2
Limiting Date	2018/07/07－2018/09/10	Latitude	+28.1±0.7
Limiting Longitude	156.0－25.4	Wind Velocity (m/sec)	+22.0±0.5

No.	Date	Time	Longitude	Sys.	PCF	Object	Location	Latitude	Observer	Est. Longitude	Error
1	2018/07/07	20:41	156.0	2	C	D SPOT	NTB-N	+29.9	Pellier, Christophe	156.5	-0.5
2	2018/07/09	02:55	154.2	2	C	D SPOT	NTB-N	+28.0	Lamy, George	154.0	+0.2
3	2018/07/14	03:07	143.8	2	C	D SPOT	NTB-N	+27.8	Lamy, George	143.9	-0.1
4	2018/07/14	12:03	142.8	2	C	D SPOT	NTB-N	+28.2	Suzuki, Kunihiko	143.2	-0.4
5	2018/07/16	12:37	137.8	2	C	D SPOT	NTB-N	+28.2	Kumamori, Teruaki	139.1	-1.3
6	2018/07/16	13:20	137.3	2	C	D SPOT	NTB-N	+28.1	Yamazaki, Akihiro	139.0	-1.7
7	2018/07/19	10:30	132.4	2	C	D SPOT	NTB-N	+28.1	Suzuki, Kunihiko	133.2	-0.8
8	2018/07/21	11:15	129.2	2	C	D SPOT	NTB-N	+27.5	Suzuki, Kunihiko	129.1	+0.1
9	2018/07/26	10:59	118.2	2	C	D SPOT	NTB-N	+28.5	Suzuki, Kunihiko	119.1	-0.9
10	2018/07/29	17:44	112.1	2	C	D SPOT	NTB-N	+27.9	Foster, Clyde	112.5	-0.4
11	2018/07/31	10:09	109.1	2	C	D SPOT	NTB-N	+28.3	Suzuki, Kunihiko	109.1	0.0
12	2018/07/31	10:52	109.4	2	C	D SPOT	NTB-N	+28.2	Miyazaki, Isao	109.1	+0.3
13	2018/08/01	17:05	106.1	2	C	D SPOT	NTB-N	+29.0	Foster, Clyde	106.5	-0.4
14	2018/08/04	02:50	104.4	2	C	D SPOT	NTB-N	+30.6	Maxson, Paul	101.7	+2.7
15	2018/08/05	09:59	100.2	2	C	D SPOT	NTB-N	+27.9	Suzuki, Kunihiko	99.1	+1.1
16	2018/08/07	10:50	96.7	2	C	D SPOT	NTB-N	+28.3	Miyazaki, Isao	95.0	+1.7
17	2018/08/14	10:39	82.5	2	C	D SPOT	NTB-N	+27.5	Suzuki, Kunihiko	80.9	+1.6
18	2018/08/14	10:20	82.4	2	C	D SPOT	NTB-N	+28.0	Einaga, Hideo	81.0	+1.4
19	2018/08/15	16:05	79.6	2	C	D SPOT	NTB-N	+27.4	Foster, Clyde	78.5	+1.1
20	2018/08/19	09:50	71.9	2	C	D SPOT	NTB-N	+27.7	Suzuki, Kunihiko	70.9	+1.0
21	2018/08/19	10:50	71.7	2	C	D SPOT	NTB-N	+27.7	Miyazaki, Isao	70.9	+0.8
22	2018/08/20	16:25	68.7	2	C	D SPOT	NTB-N	+28.0	Foster, Clyde	68.4	+0.3
23	2018/08/21	10:25	67.1	2	C	D SPOT	NTB-N	+27.4	Einaga, Hideo	66.9	+0.2
24	2018/08/21	11:12	67.9	2	C	D SPOT	NTB-N	+27.8	Yoshida, Tomoyuki	66.8	+1.1
25	2018/08/26	09:32	54.7	2	C	D SPOT	NTB-N	+28.2	Suzuki, Kunihiko	56.9	-2.2
26	2018/09/02	10:29	41.1	2	C	D SPOT	NTB-N	+28.0	Miyazaki, Isao	42.7	-1.6
27	2018/09/03	16:55	38.6	2	C	D SPOT	NTB-N	+27.6	Foster, Clyde	40.2	-1.6
28	2018/09/05	16:55	35.1	2	C	D SPOT	NTB-N	+28.2	Foster, Clyde	36.1	-1.0
29	2018/09/10	16:35	25.4	2	C	D SPOT	NTB-N	+27.8	Foster, Clyde	26.1	-0.7