메타데이터

항목	값
Designation	70P/Kojima
Type	P
Perihelion (tp_cal, UTC)	2014-10-20T16:00:34.519680Z
Orbit solution date (soln_date, UTC)	2026-05-06T05:40:47Z
Obs used	2097
NEO	-
M1	12.500
K1	11.000
PC	0.030

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2015-05-14.0000000
e	0.45391285
q (au)	2.006566
a (au)	3.674443
i (deg)	6.600119
Ω (om, deg)	119.270141
ω (w, deg)	1.953402
M (ma, deg)	28.732632

밝기

산란 + 전체 선형

$$ M_a = (15.474 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	15.474
n	2.000
gf	0.999
gb	-0.501
k	1.000
δ90	9.842

파라미터	기호	범위	설명
태양·지구거리 1 AU에서의 절대등급	H0	-5 to 20	혜성의 고유 밝기
광도 기울기 파라미터	n	2 to 6	태양거리 변화에 따른 밝기 변화율
전방 산란 비대칭 계수	gf	0.8 to 1	전방 산란의 강도
후방 산란 비대칭 계수	gb	-1 to -0.5	후방 산란의 강도
분할 계수	k	0.8 to 1	전·후방 산란 기여도 비율
먼지/가스 밝기 비	δ90	1 to 10	코마에서 먼지 산란 대비 가스 방출의 상대 기여

참고: EPSC-DPS2025-160

천체력

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-09-20 00:00	21:59:34.17	-16:59:54.9	HIP 108560	18.83
2026-09-20 12:00	21:59:18.99	-17:01:14.3	HIP 108560	17.47
2026-09-21 00:00	21:59:03.96	-17:02:32.6	HIP 108560	16.92
2026-09-21 12:00	21:58:49.07	-17:03:49.8	HIP 108560	17.21
2026-09-22 00:00	21:58:34.33	-17:05:05.8	HIP 108560	18.29
2026-09-22 12:00	21:58:19.74	-17:06:20.7	HIP 108560	20.00
2026-09-23 00:00	21:58:05.31	-17:07:34.4	HIP 108560	22.18
2026-09-23 12:00	21:57:51.04	-17:08:47.0	HIP 108560	24.68
2026-09-24 00:00	21:57:36.92	-17:09:58.4	HIP 108560	27.41
2026-09-24 12:00	21:57:22.97	-17:11:08.6	HIP 108560	30.27
2026-09-25 00:00	21:57:09.17	-17:12:17.7	HIP 108560	33.23
2026-09-25 12:00	21:56:55.55	-17:13:25.6	HIP 108419	36.11
2026-09-26 00:00	21:56:42.09	-17:14:32.2	HIP 108419	36.40
2026-09-26 12:00	21:56:28.79	-17:15:37.7	HIP 108095	35.13
2026-09-27 00:00	21:56:15.67	-17:16:42.0	HIP 108095	32.26
2026-09-27 12:00	21:56:02.72	-17:17:45.1	HIP 108095	29.52
2026-09-28 00:00	21:55:49.95	-17:18:47.0	HIP 108095	26.93
2026-09-28 12:00	21:55:37.35	-17:19:47.7	HIP 108095	24.52
2026-09-29 00:00	21:55:24.93	-17:20:47.2	HIP 108108	22.22
2026-09-29 12:00	21:55:12.68	-17:21:45.4	HIP 108108	19.36
2026-09-30 00:00	21:55:00.62	-17:22:42.5	HIP 108108	16.64
2026-09-30 12:00	21:54:48.74	-17:23:38.3	HIP 108108	14.07
2026-10-01 00:00	21:54:37.05	-17:24:32.9	HIP 108108	11.75
2026-10-01 12:00	21:54:25.54	-17:25:26.2	HIP 108108	9.80
2026-10-02 00:00	21:54:14.22	-17:26:18.3	HIP 108108	8.43
2026-10-02 12:00	21:54:03.09	-17:27:09.2	HIP 108108	7.88
2026-10-03 00:00	21:53:52.15	-17:27:58.8	HIP 108108	8.29
2026-10-03 12:00	21:53:41.40	-17:28:47.2	HIP 108108	9.47
2026-10-04 00:00	21:53:30.85	-17:29:34.4	HIP 108108	11.16
2026-10-04 12:00	21:53:20.49	-17:30:20.3	HIP 108108	13.12
2026-10-05 00:00	21:53:10.33	-17:31:04.9	HIP 108108	15.23
2026-10-05 12:00	21:53:00.36	-17:31:48.3	HIP 108108	17.41
2026-10-06 00:00	21:52:50.60	-17:32:30.4	HIP 108108	19.61
2026-10-06 12:00	21:52:41.04	-17:33:11.2	HIP 108108	21.82
2026-10-07 00:00	21:52:31.69	-17:33:50.8	HIP 108108	24.01
2026-10-07 12:00	21:52:22.53	-17:34:29.2	HIP 108108	26.18
2026-10-08 00:00	21:52:13.59	-17:35:06.2	HIP 108108	28.31
2026-10-08 12:00	21:52:04.85	-17:35:42.0	HIP 108108	30.40
2026-10-09 00:00	21:51:56.32	-17:36:16.5	HIP 107824	30.65
2026-10-09 12:00	21:51:47.99	-17:36:49.7	HIP 107824	29.05
2026-10-10 00:00	21:51:39.88	-17:37:21.7	HIP 107824	27.55
2026-10-10 12:00	21:51:31.98	-17:37:52.4	HIP 107824	26.17
2026-10-11 00:00	21:51:24.29	-17:38:21.8	HIP 107824	24.89