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)
2026-03-26 00:00	20:42:02.68	-17:00:10.7	HIP 102178	5.17
2026-03-26 12:00	20:42:12.74	-16:59:33.4	HIP 102178	5.16
2026-03-27 00:00	20:42:22.72	-16:58:56.4	HIP 102178	6.23
2026-03-27 12:00	20:42:32.62	-16:58:19.6	HIP 102178	7.93
2026-03-28 00:00	20:42:42.44	-16:57:43.0	HIP 102178	9.93
2026-03-28 12:00	20:42:52.19	-16:57:06.7	HIP 102178	12.07
2026-03-29 00:00	20:43:01.86	-16:56:30.7	HIP 102178	14.27
2026-03-29 12:00	20:43:11.44	-16:55:54.9	HIP 102178	16.51
2026-03-30 00:00	20:43:20.95	-16:55:19.4	HIP 102178	18.76
2026-03-30 12:00	20:43:30.37	-16:54:44.2	HIP 102178	21.02
2026-03-31 00:00	20:43:39.72	-16:54:09.2	HIP 102178	23.27
2026-03-31 12:00	20:43:48.98	-16:53:34.5	HIP 102178	25.51
2026-04-01 00:00	20:43:58.16	-16:53:00.1	HIP 102178	27.74
2026-04-01 12:00	20:44:07.26	-16:52:25.9	HIP 102178	29.95
2026-04-02 00:00	20:44:16.27	-16:51:52.1	HIP 102178	32.15
2026-04-02 12:00	20:44:25.20	-16:51:18.5	HIP 102515	31.59
2026-04-03 00:00	20:44:34.05	-16:50:45.2	HIP 102515	29.40
2026-04-03 12:00	20:44:42.82	-16:50:12.2	HIP 102515	27.24
2026-04-04 00:00	20:44:51.50	-16:49:39.4	HIP 102515	25.09
2026-04-04 12:00	20:45:00.09	-16:49:07.0	HIP 102515	22.97
2026-04-05 00:00	20:45:08.60	-16:48:34.8	HIP 102515	20.87
2026-04-05 12:00	20:45:17.03	-16:48:03.0	HIP 102515	18.79
2026-04-06 00:00	20:45:25.36	-16:47:31.5	HIP 102515	16.73
2026-04-06 12:00	20:45:33.61	-16:47:00.2	HIP 102515	14.70
2026-04-07 00:00	20:45:41.78	-16:46:29.3	HIP 102515	12.69
2026-04-07 12:00	20:45:49.85	-16:45:58.6	HIP 102515	10.71
2026-04-08 00:00	20:45:57.84	-16:45:28.3	HIP 102515	8.75
2026-04-08 12:00	20:46:05.74	-16:44:58.3	HIP 102515	6.83
2026-04-09 00:00	20:46:13.55	-16:44:28.6	HIP 102515	4.95
2026-04-09 12:00	20:46:21.27	-16:43:59.3	HIP 102515	3.17
2026-04-10 00:00	20:46:28.90	-16:43:30.2	HIP 102515	1.72
2026-04-10 12:00	20:46:36.44	-16:43:01.5	HIP 102515	1.71
2026-04-11 00:00	20:46:43.89	-16:42:33.1	HIP 102515	3.12
2026-04-11 12:00	20:46:51.25	-16:42:05.0	HIP 102515	4.82
2026-04-12 00:00	20:46:58.52	-16:41:37.3	HIP 102515	6.56
2026-04-12 12:00	20:47:05.69	-16:41:09.9	HIP 102600	7.39
2026-04-13 00:00	20:47:12.78	-16:40:42.8	HIP 102600	6.09
2026-04-13 12:00	20:47:19.76	-16:40:16.1	HIP 102600	5.07
2026-04-14 00:00	20:47:26.66	-16:39:49.8	HIP 102600	4.51
2026-04-14 12:00	20:47:33.46	-16:39:23.7	HIP 102600	4.56
2026-04-15 00:00	20:47:40.17	-16:38:58.1	HIP 102600	5.18
2026-04-15 12:00	20:47:46.78	-16:38:32.7	HIP 102600	6.18
2026-04-16 00:00	20:47:53.30	-16:38:07.8	HIP 102600	7.39