메타데이터

항목	값
Designation	375P/Hill
Type	P
Perihelion (tp_cal, UTC)	2018-12-20T18:39:30.548160Z
Orbit solution date (soln_date, UTC)	2021-04-15T23:28:37Z
Obs used	313
NEO	-
M1	16.700
K1	6.000
PC	-

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2015-07-29.0000000
e	0.66003940
q (au)	1.892519
a (au)	5.566878
i (deg)	17.369839
Ω (om, deg)	359.974029
ω (w, deg)	119.434290
M (ma, deg)	266.893415

밝기

산란 + 전체 선형

$$ M_a = (18.115 + 2.060\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	18.115
n	2.060
gf	1.000
gb	-0.603
k	0.800
δ90	10.000

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)
2026-06-01 00:00	21:22:35.35	-30:52:10.0	HIP 105580	7.47
2026-06-01 12:00	21:22:32.54	-30:53:02.3	HIP 105580	8.42
2026-06-02 00:00	21:22:29.60	-30:53:55.0	HIP 105580	9.42
2026-06-02 12:00	21:22:26.54	-30:54:48.0	HIP 105580	10.46
2026-06-03 00:00	21:22:23.36	-30:55:41.5	HIP 105580	11.54
2026-06-03 12:00	21:22:20.05	-30:56:35.3	HIP 105580	12.65
2026-06-04 00:00	21:22:16.62	-30:57:29.5	HIP 105580	13.79
2026-06-04 12:00	21:22:13.07	-30:58:24.0	HIP 105580	14.95
2026-06-05 00:00	21:22:09.39	-30:59:18.9	HIP 105580	16.15
2026-06-05 12:00	21:22:05.59	-31:00:14.1	HIP 105395	15.82
2026-06-06 00:00	21:22:01.67	-31:01:09.7	HIP 105395	15.20
2026-06-06 12:00	21:21:57.63	-31:02:05.6	HIP 105395	14.64
2026-06-07 00:00	21:21:53.46	-31:03:01.8	HIP 105395	14.15
2026-06-07 12:00	21:21:49.17	-31:03:58.4	HIP 105395	13.74
2026-06-08 00:00	21:21:44.76	-31:04:55.3	HIP 105395	13.43
2026-06-08 12:00	21:21:40.22	-31:05:52.5	HIP 105395	13.24
2026-06-09 00:00	21:21:35.57	-31:06:50.0	HIP 105395	13.17
2026-06-09 12:00	21:21:30.79	-31:07:47.8	HIP 105395	13.23
2026-06-10 00:00	21:21:25.89	-31:08:45.9	HIP 105395	13.43
2026-06-10 12:00	21:21:20.87	-31:09:44.3	HIP 105395	13.77
2026-06-11 00:00	21:21:15.72	-31:10:42.9	HIP 105395	14.25
2026-06-11 12:00	21:21:10.46	-31:11:41.9	HIP 105395	14.85
2026-06-12 00:00	21:21:05.07	-31:12:41.1	HIP 105395	15.58
2026-06-12 12:00	21:20:59.57	-31:13:40.5	HIP 105395	16.42
2026-06-13 00:00	21:20:53.94	-31:14:40.3	HIP 105395	17.35
2026-06-13 12:00	21:20:48.19	-31:15:40.2	HIP 105395	18.38
2026-06-14 00:00	21:20:42.33	-31:16:40.4	HIP 105395	19.49
2026-06-14 12:00	21:20:36.34	-31:17:40.9	HIP 105395	20.68
2026-06-15 00:00	21:20:30.24	-31:18:41.5	HIP 105395	21.93
2026-06-15 12:00	21:20:24.01	-31:19:42.4	HIP 105395	23.24
2026-06-16 00:00	21:20:17.67	-31:20:43.5	HIP 105395	24.60
2026-06-16 12:00	21:20:11.21	-31:21:44.8	HIP 105395	26.02
2026-06-17 00:00	21:20:04.64	-31:22:46.3	HIP 105395	27.48
2026-06-17 12:00	21:19:57.95	-31:23:47.9	HIP 105395	28.99
2026-06-18 00:00	21:19:51.14	-31:24:49.8	HIP 105395	30.53
2026-06-18 12:00	21:19:44.22	-31:25:51.8	HIP 105395	32.12
2026-06-19 00:00	21:19:37.18	-31:26:53.9	HIP 105340	33.57
2026-06-19 12:00	21:19:30.03	-31:27:56.2	HIP 105340	32.95
2026-06-20 00:00	21:19:22.77	-31:28:58.7	HIP 105340	32.43
2026-06-20 12:00	21:19:15.39	-31:30:01.3	HIP 105340	32.02
2026-06-21 00:00	21:19:07.90	-31:31:04.0	HIP 105340	31.72
2026-06-21 12:00	21:19:00.30	-31:32:06.8	HIP 105085	30.45
2026-06-22 00:00	21:18:52.59	-31:33:09.8	HIP 105085	28.54