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)
2026-07-29 00:00	20:35:25.20	-17:33:30.2	HIP 101596	13.79
2026-07-29 12:00	20:35:14.69	-17:34:14.2	HIP 101596	13.25
2026-07-30 00:00	20:35:04.18	-17:34:58.2	HIP 101596	13.22
2026-07-30 12:00	20:34:53.67	-17:35:42.1	HIP 101596	13.70
2026-07-31 00:00	20:34:43.16	-17:36:26.1	HIP 101596	14.63
2026-07-31 12:00	20:34:32.65	-17:37:10.0	HIP 101596	15.94
2026-08-01 00:00	20:34:22.14	-17:37:53.9	HIP 101596	17.54
2026-08-01 12:00	20:34:11.64	-17:38:37.8	HIP 101596	19.36
2026-08-02 00:00	20:34:01.15	-17:39:21.6	HIP 101596	21.34
2026-08-02 12:00	20:33:50.67	-17:40:05.4	HIP 101596	23.44
2026-08-03 00:00	20:33:40.19	-17:40:49.2	HIP 101596	25.63
2026-08-03 12:00	20:33:29.72	-17:41:32.9	HIP 101596	27.89
2026-08-04 00:00	20:33:19.26	-17:42:16.6	HIP 101596	30.20
2026-08-04 12:00	20:33:08.82	-17:43:00.3	HIP 101596	32.55
2026-08-05 00:00	20:32:58.39	-17:43:43.8	HIP 101249	30.78
2026-08-05 12:00	20:32:47.97	-17:44:27.3	HIP 101249	28.51
2026-08-06 00:00	20:32:37.58	-17:45:10.8	HIP 101249	26.30
2026-08-06 12:00	20:32:27.19	-17:45:54.2	HIP 101249	24.16
2026-08-07 00:00	20:32:16.83	-17:46:37.5	HIP 101249	22.12
2026-08-07 12:00	20:32:06.49	-17:47:20.7	HIP 101249	20.21
2026-08-08 00:00	20:31:56.17	-17:48:03.8	HIP 101249	18.45
2026-08-08 12:00	20:31:45.87	-17:48:46.9	HIP 101249	16.91
2026-08-09 00:00	20:31:35.59	-17:49:29.8	HIP 101249	15.64
2026-08-09 12:00	20:31:25.34	-17:50:12.7	HIP 101249	14.70
2026-08-10 00:00	20:31:15.12	-17:50:55.4	HIP 101249	14.16
2026-08-10 12:00	20:31:04.93	-17:51:38.1	HIP 101249	14.07
2026-08-11 00:00	20:30:54.76	-17:52:20.6	HIP 101249	14.42
2026-08-11 12:00	20:30:44.62	-17:53:03.0	HIP 101249	15.18
2026-08-12 00:00	20:30:34.52	-17:53:45.3	HIP 101249	16.30
2026-08-12 12:00	20:30:24.45	-17:54:27.5	HIP 101249	17.69
2026-08-13 00:00	20:30:14.42	-17:55:09.5	HIP 101040	17.74
2026-08-13 12:00	20:30:04.42	-17:55:51.4	HIP 101040	15.53
2026-08-14 00:00	20:29:54.46	-17:56:33.2	HIP 101040	13.42
2026-08-14 12:00	20:29:44.53	-17:57:14.8	HIP 101040	11.46
2026-08-15 00:00	20:29:34.65	-17:57:56.2	HIP 101040	9.74
2026-08-15 12:00	20:29:24.81	-17:58:37.5	HIP 101040	8.39
2026-08-16 00:00	20:29:15.01	-17:59:18.6	HIP 101040	7.61
2026-08-16 12:00	20:29:05.25	-17:59:59.6	HIP 101040	7.57
2026-08-17 00:00	20:28:55.54	-18:00:40.4	HIP 101040	8.26
2026-08-17 12:00	20:28:45.87	-18:01:21.1	HIP 101040	9.52
2026-08-18 00:00	20:28:36.26	-18:02:01.5	HIP 100931	10.77
2026-08-18 12:00	20:28:26.69	-18:02:41.8	HIP 100931	8.44
2026-08-19 00:00	20:28:17.16	-18:03:21.9	HIP 100931	6.16