메타데이터

항목	값
Designation	C/2022 T1 (Lemmon)
Type	C
Perihelion (tp_cal, UTC)	2024-02-17T12:18:13.901760Z
Orbit solution date (soln_date, UTC)	2024-07-22T18:42:14Z
Obs used	587
NEO	-
M1	13.100
K1	4.500
PC	-
Discovery observation (MPC, UTC)	2022-10-03T11:55:57.561600Z
Discovery magnitude (MPC)	21.24 G
Discovery observatory (MPC)	G96 · Mt. Lemmon Survey

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2023-10-10.0000000
e	0.99971338
q (au)	3.444855
a (au)	12018.953434
i (deg)	22.543649
Ω (om, deg)	236.919592
ω (w, deg)	324.316453
M (ma, deg)	359.999902

밝기

산란 + 전체 선형

$$ M_a = (11.928 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	11.928
n	2.000
gf	0.990
gb	-0.786
k	1.000
δ90	9.978

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

잔차 (구간 선형)

$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$

시작일 (UTC)	끝 (UTC)	a	b
2022-10-03	2023-01-17	+12.9255	-9.332
2023-01-17	2023-05-12	+7.4344	-5.338
2023-05-12	2024-02-14	-1.8399	+0.708

log10 r = log10(태양거리/AU), Δ = 지구거리(AU)

찾아보기

천체력

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-05-12 00:00	20:00:43.85	+00:15:54.5	HIP 98429	25.65
2026-05-12 12:00	20:00:42.28	+00:17:23.5	HIP 98429	24.15
2026-05-13 00:00	20:00:40.59	+00:18:51.9	HIP 98429	22.65
2026-05-13 12:00	20:00:38.77	+00:20:19.7	HIP 98429	21.15
2026-05-14 00:00	20:00:36.83	+00:21:47.1	HIP 98429	19.64
2026-05-14 12:00	20:00:34.76	+00:23:13.8	HIP 98429	18.13
2026-05-15 00:00	20:00:32.57	+00:24:40.0	HIP 98429	16.62
2026-05-15 12:00	20:00:30.26	+00:26:05.6	HIP 98429	15.11
2026-05-16 00:00	20:00:27.82	+00:27:30.6	HIP 98429	13.59
2026-05-16 12:00	20:00:25.25	+00:28:55.1	HIP 98429	12.06
2026-05-17 00:00	20:00:22.57	+00:30:18.9	HIP 98429	10.53
2026-05-17 12:00	20:00:19.76	+00:31:42.1	HIP 98429	9.00
2026-05-18 00:00	20:00:16.83	+00:33:04.8	HIP 98429	7.47
2026-05-18 12:00	20:00:13.77	+00:34:26.8	HIP 98429	5.94
2026-05-19 00:00	20:00:10.60	+00:35:48.2	HIP 98429	4.42
2026-05-19 12:00	20:00:07.31	+00:37:08.9	HIP 98429	2.93
2026-05-20 00:00	20:00:03.89	+00:38:29.0	HIP 98429	1.59
2026-05-20 12:00	20:00:00.36	+00:39:48.5	HIP 98429	1.20
2026-05-21 00:00	19:59:56.71	+00:41:07.4	HIP 98429	2.32
2026-05-21 12:00	19:59:52.93	+00:42:25.6	HIP 98429	3.80
2026-05-22 00:00	19:59:49.05	+00:43:43.2	HIP 98429	5.36
2026-05-22 12:00	19:59:45.04	+00:45:00.1	HIP 98429	6.94
2026-05-23 00:00	19:59:40.92	+00:46:16.3	HIP 98429	8.55
2026-05-23 12:00	19:59:36.68	+00:47:31.9	HIP 98429	10.17
2026-05-24 00:00	19:59:32.32	+00:48:46.7	HIP 98429	11.81
2026-05-24 12:00	19:59:27.86	+00:50:01.0	HIP 98429	13.45
2026-05-25 00:00	19:59:23.27	+00:51:14.5	HIP 98429	15.11
2026-05-25 12:00	19:59:18.58	+00:52:27.4	HIP 98429	16.78
2026-05-26 00:00	19:59:13.77	+00:53:39.5	HIP 98429	18.46
2026-05-26 12:00	19:59:08.85	+00:54:51.0	HIP 98429	20.15
2026-05-27 00:00	19:59:03.82	+00:56:01.8	HIP 98429	21.85
2026-05-27 12:00	19:58:58.67	+00:57:11.8	HIP 98429	23.57
2026-05-28 00:00	19:58:53.42	+00:58:21.2	HIP 98429	25.29
2026-05-28 12:00	19:58:48.06	+00:59:29.8	HIP 98385	24.71
2026-05-29 00:00	19:58:42.59	+01:00:37.8	HIP 98385	24.19
2026-05-29 12:00	19:58:37.01	+01:01:45.0	HIP 98385	23.81
2026-05-30 00:00	19:58:31.32	+01:02:51.4	HIP 98385	23.59
2026-05-30 12:00	19:58:25.53	+01:03:57.2	HIP 98385	23.52
2026-05-31 00:00	19:58:19.63	+01:05:02.2	HIP 98147	23.36
2026-05-31 12:00	19:58:13.62	+01:06:06.5	HIP 98147	21.83
2026-06-01 00:00	19:58:07.51	+01:07:10.0	HIP 98147	20.33
2026-06-01 12:00	19:58:01.30	+01:08:12.8	HIP 98147	18.87
2026-06-02 00:00	19:57:54.98	+01:09:14.8	HIP 98147	17.45