Rotation Period in 2018 Apparition(NTCBD26)

Object	NTBn dark spot	ID	NTCBD26

Period		Data Count	28
Rotation Period	9h54m16.9s±1.6s	Refernce Date	2018/05/09
Drift Rate (deg./day)	-2.044±0.040	Refernce Longitude	287.0±1.3
Limiting Date	2018/07/07－2018/09/10	Latitude	+27.9±0.4
Limiting Longitude	164.8－30.2	Wind Velocity (m/sec)	+22.4±0.5

No.	Date	Time	Longitude	Sys.	PCF	Object	Location	Latitude	Observer	Est. Longitude	Error
1	2018/07/07	20:41	164.8	2	C	D SPOT	NTB-N	+28.6	Pellier, Christophe	164.6	+0.2
2	2018/07/09	02:55	163.2	2	C	D SPOT	NTB-N	+28.2	Lamy, George	162.0	+1.2
3	2018/07/14	03:07	151.4	2	C	D SPOT	NTB-N	+27.7	Lamy, George	151.8	-0.4
4	2018/07/16	12:37	146.8	2	C	D SPOT	NTB-N	+27.6	Kumamori, Teruaki	146.9	-0.1
5	2018/07/16	13:20	145.9	2	C	D SPOT	NTB-N	+28.0	Yamazaki, Akihiro	146.8	-0.9
6	2018/07/17	10:36	145.0	2	C	D SPOT	NTB-N	+27.9	Einaga, Hideo	145.0	0.0
7	2018/07/19	10:30	138.6	2	C	D SPOT	NTB-N	+27.8	Suzuki, Kunihiko	140.9	-2.3
8	2018/07/21	11:15	136.0	2	C	D SPOT	NTB-N	+28.3	Suzuki, Kunihiko	136.8	-0.8
9	2018/07/26	10:59	126.1	2	C	D SPOT	NTB-N	+28.3	Suzuki, Kunihiko	126.6	-0.5
10	2018/07/29	17:44	119.2	2	C	D SPOT	NTB-N	+28.1	Foster, Clyde	119.9	-0.7
11	2018/07/31	10:09	116.0	2	C	D SPOT	NTB-N	+28.2	Suzuki, Kunihiko	116.4	-0.4
12	2018/07/31	10:52	116.2	2	C	D SPOT	NTB-N	+28.3	Miyazaki, Isao	116.4	-0.2
13	2018/08/01	17:05	112.8	2	C	D SPOT	NTB-N	+27.6	Foster, Clyde	113.8	-1.0
14	2018/08/05	09:59	106.4	2	C	D SPOT	NTB-N	+28.0	Suzuki, Kunihiko	106.2	+0.2
15	2018/08/07	10:50	103.2	2	C	D SPOT	NTB-N	+28.3	Miyazaki, Isao	102.1	+1.1
16	2018/08/14	10:39	89.7	2	C	D SPOT	NTB-N	+27.6	Suzuki, Kunihiko	87.8	+1.9
17	2018/08/14	10:20	88.9	2	C	D SPOT	NTB-N	+27.7	Einaga, Hideo	87.8	+1.1
18	2018/08/15	16:05	86.6	2	C	D SPOT	NTB-N	+27.8	Foster, Clyde	85.3	+1.3
19	2018/08/19	09:50	79.6	2	C	D SPOT	NTB-N	+27.6	Suzuki, Kunihiko	77.6	+2.0
20	2018/08/19	10:50	79.0	2	C	D SPOT	NTB-N	+27.8	Miyazaki, Isao	77.6	+1.4
21	2018/08/20	16:25	76.0	2	C	D SPOT	NTB-N	+28.2	Foster, Clyde	75.0	+1.0
22	2018/08/21	10:25	74.1	2	C	D SPOT	NTB-N	+27.0	Einaga, Hideo	73.5	+0.6
23	2018/08/21	11:12	75.8	2	C	D SPOT	NTB-N	+28.2	Yoshida, Tomoyuki	73.4	+2.4
24	2018/08/26	09:32	63.2	2	C	D SPOT	NTB-N	+28.4	Suzuki, Kunihiko	63.4	-0.2
25	2018/09/02	10:29	47.4	2	C	D SPOT	NTB-N	+27.4	Miyazaki, Isao	49.0	-1.6
26	2018/09/03	16:55	44.2	2	C	D SPOT	NTB-N	+27.8	Foster, Clyde	46.4	-2.2
27	2018/09/05	16:55	41.2	2	C	D SPOT	NTB-N	+27.7	Foster, Clyde	42.3	-1.1
28	2018/09/10	16:35	30.2	2	C	D SPOT	NTB-N	+27.4	Foster, Clyde	32.1	-1.9