메타데이터

항목	값
Designation	396P/Leonard
Type	P
Perihelion (tp_cal, UTC)	2019-08-29T03:15:14.060160Z
Orbit solution date (soln_date, UTC)	2023-04-24T23:29:36Z
Obs used	115
NEO	-
M1	15.700
K1	4.500
PC	-

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2018-05-09.0000000
e	0.41780395
q (au)	3.983116
a (au)	6.841537
i (deg)	5.434040
Ω (om, deg)	136.663398
ω (w, deg)	8.678978
M (ma, deg)	333.720604

밝기

산란 + 전체 선형

$$ M_a = (9.411 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	9.411
n	6.000
gf	1.000
gb	-0.855
k	0.998
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	20:50:33.12	-16:28:59.0	HIP 102922	8.84
2026-06-01 12:00	20:50:29.93	-16:29:13.3	HIP 102922	9.63
2026-06-02 00:00	20:50:26.64	-16:29:28.0	HIP 102922	10.44
2026-06-02 12:00	20:50:23.25	-16:29:43.2	HIP 102922	11.29
2026-06-03 00:00	20:50:19.76	-16:29:58.8	HIP 102922	12.15
2026-06-03 12:00	20:50:16.16	-16:30:14.8	HIP 102922	13.05
2026-06-04 00:00	20:50:12.46	-16:30:31.2	HIP 102922	13.97
2026-06-04 12:00	20:50:08.66	-16:30:48.1	HIP 102922	14.92
2026-06-05 00:00	20:50:04.75	-16:31:05.4	HIP 102922	15.89
2026-06-05 12:00	20:50:00.75	-16:31:23.1	HIP 102922	16.89
2026-06-06 00:00	20:49:56.64	-16:31:41.3	HIP 102922	17.92
2026-06-06 12:00	20:49:52.44	-16:31:59.8	HIP 102922	18.97
2026-06-07 00:00	20:49:48.13	-16:32:18.8	HIP 102922	20.04
2026-06-07 12:00	20:49:43.73	-16:32:38.2	HIP 102922	21.14
2026-06-08 00:00	20:49:39.22	-16:32:58.0	HIP 102658	20.75
2026-06-08 12:00	20:49:34.62	-16:33:18.2	HIP 102658	19.68
2026-06-09 00:00	20:49:29.91	-16:33:38.9	HIP 102658	18.60
2026-06-09 12:00	20:49:25.11	-16:34:00.0	HIP 102658	17.51
2026-06-10 00:00	20:49:20.21	-16:34:21.4	HIP 102658	16.41
2026-06-10 12:00	20:49:15.21	-16:34:43.3	HIP 102658	15.32
2026-06-11 00:00	20:49:10.12	-16:35:05.5	HIP 102658	14.22
2026-06-11 12:00	20:49:04.93	-16:35:28.2	HIP 102658	13.15
2026-06-12 00:00	20:48:59.64	-16:35:51.3	HIP 102658	12.09
2026-06-12 12:00	20:48:54.26	-16:36:14.8	HIP 102658	11.08
2026-06-13 00:00	20:48:48.78	-16:36:38.6	HIP 102658	10.13
2026-06-13 12:00	20:48:43.20	-16:37:02.9	HIP 102658	9.27
2026-06-14 00:00	20:48:37.54	-16:37:27.6	HIP 102658	8.54
2026-06-14 12:00	20:48:31.77	-16:37:52.6	HIP 102659	7.84
2026-06-15 00:00	20:48:25.92	-16:38:18.0	HIP 102659	6.75
2026-06-15 12:00	20:48:19.97	-16:38:43.9	HIP 102659	5.83
2026-06-16 00:00	20:48:13.93	-16:39:10.1	HIP 102659	5.16
2026-06-16 12:00	20:48:07.80	-16:39:36.6	HIP 102659	4.89
2026-06-17 00:00	20:48:01.59	-16:40:03.6	HIP 102659	5.09
2026-06-17 12:00	20:47:55.28	-16:40:30.9	HIP 102659	5.73
2026-06-18 00:00	20:47:48.88	-16:40:58.6	HIP 102600	4.59
2026-06-18 12:00	20:47:42.39	-16:41:26.7	HIP 102600	3.17
2026-06-19 00:00	20:47:35.82	-16:41:55.1	HIP 102600	2.07
2026-06-19 12:00	20:47:29.16	-16:42:23.9	HIP 102600	1.98
2026-06-20 00:00	20:47:22.41	-16:42:53.0	HIP 102600	3.04
2026-06-20 12:00	20:47:15.58	-16:43:22.5	HIP 102600	4.52
2026-06-21 00:00	20:47:08.67	-16:43:52.3	HIP 102600	6.14
2026-06-21 12:00	20:47:01.67	-16:44:22.4	HIP 102515	7.72
2026-06-22 00:00	20:46:54.59	-16:44:53.0	HIP 102515	6.36