메타데이터

항목	값
Designation	15P/Finlay
Type	P
Perihelion (tp_cal, UTC)	2014-12-27T01:44:35.957760Z
Orbit solution date (soln_date, UTC)	2024-04-16T11:19:30Z
Obs used	1655
NEO	Yes
M1	14.900
K1	8.500
PC	-

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2015-11-01.0000000
e	0.72018544
q (au)	0.976687
a (au)	3.490479
i (deg)	6.800480
Ω (om, deg)	13.753875
ω (w, deg)	347.625750
M (ma, deg)	46.690962

밝기

산란 + 전체 선형

$$ M_a = (14.416 + 5.627\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	14.416
n	5.627
gf	1.000
gb	-0.643
k	0.800
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

잔차 (구간 선형)

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

시작일 (UTC)	끝 (UTC)	a	b
2021-04-10	2022-03-03	+4.0180	-1.591

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

천체력

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-09-20 00:00	13:30:48.30	-11:21:19.1	HIP 65849	15.58
2026-09-20 12:00	13:31:11.98	-11:23:42.8	HIP 66018	15.39
2026-09-21 00:00	13:31:35.73	-11:26:06.9	HIP 66018	12.88
2026-09-21 12:00	13:31:59.55	-11:28:31.4	HIP 66018	13.21
2026-09-22 00:00	13:32:23.45	-11:30:56.2	HIP 66018	16.23
2026-09-22 12:00	13:32:47.43	-11:33:21.4	HIP 66018	20.81
2026-09-23 00:00	13:33:11.47	-11:35:46.8	HIP 66216	16.65
2026-09-23 12:00	13:33:35.59	-11:38:12.6	HIP 66216	11.96
2026-09-24 00:00	13:33:59.78	-11:40:38.8	HIP 66216	9.51
2026-09-24 12:00	13:34:24.04	-11:43:05.2	HIP 66216	10.96
2026-09-25 00:00	13:34:48.37	-11:45:32.0	HIP 66216	15.25
2026-09-25 12:00	13:35:12.78	-11:47:59.1	HIP 66216	20.70
2026-09-26 00:00	13:35:37.25	-11:50:26.5	HIP 66216	26.63
2026-09-26 12:00	13:36:01.79	-11:52:54.2	HIP 66216	32.78
2026-09-27 00:00	13:36:26.40	-11:55:22.2	HIP 66453	27.96
2026-09-27 12:00	13:36:51.09	-11:57:50.6	HIP 66453	23.19
2026-09-28 00:00	13:37:15.83	-12:00:19.2	HIP 66453	19.46
2026-09-28 12:00	13:37:40.65	-12:02:48.1	HIP 66453	17.47
2026-09-29 00:00	13:38:05.53	-12:05:17.3	HIP 66617	17.67
2026-09-29 12:00	13:38:30.49	-12:07:46.7	HIP 66617	11.79
2026-09-30 00:00	13:38:55.50	-12:10:16.5	HIP 66617	7.24
2026-09-30 12:00	13:39:20.59	-12:12:46.5	HIP 66617	7.29
2026-10-01 00:00	13:39:45.74	-12:15:16.8	HIP 66617	11.91
2026-10-01 12:00	13:40:10.95	-12:17:47.4	HIP 66617	17.86
2026-10-02 00:00	13:40:36.23	-12:20:18.2	HIP 66617	24.20
2026-10-02 12:00	13:41:01.57	-12:22:49.3	HIP 66758	24.16
2026-10-03 00:00	13:41:26.98	-12:25:20.7	HIP 66758	22.63
2026-10-03 12:00	13:41:52.45	-12:27:52.3	HIP 66758	23.03
2026-10-04 00:00	13:42:17.99	-12:30:24.1	HIP 66758	25.29
2026-10-04 12:00	13:42:43.59	-12:32:56.2	HIP 66901	27.79
2026-10-05 00:00	13:43:09.25	-12:35:28.6	HIP 66901	31.35
2026-10-05 12:00	13:43:34.97	-12:38:01.1	HIP 67144	33.37
2026-10-06 00:00	13:44:00.75	-12:40:34.0	HIP 67144	29.33
2026-10-06 12:00	13:44:26.59	-12:43:07.0	HIP 67163	25.20
2026-10-07 00:00	13:44:52.49	-12:45:40.2	HIP 67163	18.66
2026-10-07 12:00	13:45:18.45	-12:48:13.7	HIP 67163	12.40
2026-10-08 00:00	13:45:44.47	-12:50:47.4	HIP 67163	7.23
2026-10-08 12:00	13:46:10.55	-12:53:21.3	HIP 67163	6.68
2026-10-09 00:00	13:46:36.69	-12:55:55.4	HIP 67163	11.45
2026-10-09 12:00	13:47:02.88	-12:58:29.7	HIP 67254	8.25
2026-10-10 00:00	13:47:29.13	-13:01:04.1	HIP 67254	8.24
2026-10-10 12:00	13:47:55.43	-13:03:38.8	HIP 67254	12.77
2026-10-11 00:00	13:48:21.79	-13:06:13.6	HIP 67254	18.81