메타데이터

항목	값
Designation	211P/Hill
Type	P
Perihelion (tp_cal, UTC)	2016-01-27T02:47:26.427840Z
Orbit solution date (soln_date, UTC)	2024-05-14T12:42:30Z
Obs used	854
NEO	-
M1	7.800
K1	24.250
PC	0.030

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2014-03-20.0000000
e	0.33923044
q (au)	2.351929
a (au)	3.559379
i (deg)	18.888227
Ω (om, deg)	117.272120
ω (w, deg)	4.337626
M (ma, deg)	260.471637

밝기

산란 + 전체 선형

$$ M_a = (11.022 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	11.022
n	6.000
gf	0.999
gb	-0.818
k	0.999
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)
2026-09-20 00:00	20:53:23.05	-26:02:19.7	HIP 103148	18.38
2026-09-20 12:00	20:53:13.46	-26:03:04.6	HIP 103148	18.69
2026-09-21 00:00	20:53:04.08	-26:03:48.2	HIP 103148	19.25
2026-09-21 12:00	20:52:54.93	-26:04:30.5	HIP 103148	20.03
2026-09-22 00:00	20:52:46.01	-26:05:11.5	HIP 103148	20.98
2026-09-22 12:00	20:52:37.30	-26:05:51.3	HIP 103148	22.07
2026-09-23 00:00	20:52:28.83	-26:06:29.8	HIP 103148	23.26
2026-09-23 12:00	20:52:20.57	-26:07:06.9	HIP 103148	24.52
2026-09-24 00:00	20:52:12.55	-26:07:42.9	HIP 103148	25.83
2026-09-24 12:00	20:52:04.75	-26:08:17.6	HIP 103148	27.17
2026-09-25 00:00	20:51:57.18	-26:08:51.0	HIP 103148	28.53
2026-09-25 12:00	20:51:49.85	-26:09:23.1	HIP 103148	29.89
2026-09-26 00:00	20:51:42.74	-26:09:54.1	HIP 103148	31.24
2026-09-26 12:00	20:51:35.86	-26:10:23.7	HIP 103148	32.58
2026-09-27 00:00	20:51:29.21	-26:10:52.2	HIP 102812	32.93
2026-09-27 12:00	20:51:22.79	-26:11:19.4	HIP 102812	32.22
2026-09-28 00:00	20:51:16.61	-26:11:45.4	HIP 102812	31.58
2026-09-28 12:00	20:51:10.66	-26:12:10.1	HIP 102812	31.01
2026-09-29 00:00	20:51:04.94	-26:12:33.7	HIP 102812	30.52
2026-09-29 12:00	20:50:59.46	-26:12:56.0	HIP 102812	30.09
2026-09-30 00:00	20:50:54.21	-26:13:17.2	HIP 102812	29.72
2026-09-30 12:00	20:50:49.19	-26:13:37.1	HIP 102812	29.41
2026-10-01 00:00	20:50:44.41	-26:13:55.9	HIP 102812	29.15
2026-10-01 12:00	20:50:39.87	-26:14:13.4	HIP 102812	28.94
2026-10-02 00:00	20:50:35.56	-26:14:29.8	HIP 102812	28.76
2026-10-02 12:00	20:50:31.49	-26:14:45.0	HIP 102812	28.63
2026-10-03 00:00	20:50:27.66	-26:14:59.0	HIP 102812	28.53
2026-10-03 12:00	20:50:24.06	-26:15:11.8	HIP 102812	28.45
2026-10-04 00:00	20:50:20.70	-26:15:23.5	HIP 102812	28.40
2026-10-04 12:00	20:50:17.58	-26:15:34.0	HIP 102812	28.36
2026-10-05 00:00	20:50:14.70	-26:15:43.4	HIP 102812	28.34
2026-10-05 12:00	20:50:12.06	-26:15:51.6	HIP 102812	28.32
2026-10-06 00:00	20:50:09.66	-26:15:58.7	HIP 102812	28.32
2026-10-06 12:00	20:50:07.49	-26:16:04.6	HIP 102812	28.31
2026-10-07 00:00	20:50:05.57	-26:16:09.4	HIP 102812	28.31
2026-10-07 12:00	20:50:03.88	-26:16:13.1	HIP 102812	28.30
2026-10-08 00:00	20:50:02.44	-26:16:15.6	HIP 102812	28.29
2026-10-08 12:00	20:50:01.23	-26:16:17.0	HIP 102812	28.27
2026-10-09 00:00	20:50:00.27	-26:16:17.3	HIP 102812	28.24
2026-10-09 12:00	20:49:59.54	-26:16:16.5	HIP 102812	28.21
2026-10-10 00:00	20:49:59.06	-26:16:14.6	HIP 102812	28.16
2026-10-10 12:00	20:49:58.81	-26:16:11.6	HIP 102812	28.10
2026-10-11 00:00	20:49:58.81	-26:16:07.5	HIP 102812	28.04