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)
2026-05-12 00:00	13:02:59.63	-08:17:54.3	HIP 63685	22.48
2026-05-12 12:00	13:02:43.59	-08:16:23.8	HIP 63685	21.54
2026-05-13 00:00	13:02:27.70	-08:14:54.1	HIP 63548	20.36
2026-05-13 12:00	13:02:11.96	-08:13:25.1	HIP 63548	18.31
2026-05-14 00:00	13:01:56.36	-08:11:57.0	HIP 63548	17.06
2026-05-14 12:00	13:01:40.92	-08:10:29.6	HIP 63548	16.75
2026-05-15 00:00	13:01:25.63	-08:09:03.1	HIP 63548	17.42
2026-05-15 12:00	13:01:10.50	-08:07:37.3	HIP 63548	18.92
2026-05-16 00:00	13:00:55.52	-08:06:12.4	HIP 63548	21.07
2026-05-16 12:00	13:00:40.70	-08:04:48.4	HIP 63548	23.66
2026-05-17 00:00	13:00:26.05	-08:03:25.2	HIP 63548	26.55
2026-05-17 12:00	13:00:11.56	-08:02:02.9	HIP 63548	29.63
2026-05-18 00:00	12:59:57.23	-08:00:41.5	HIP 63548	32.84
2026-05-18 12:00	12:59:43.07	-07:59:21.0	HIP 63548	36.12
2026-05-19 00:00	12:59:29.08	-07:58:01.5	HIP 63548	39.44
2026-05-19 12:00	12:59:15.25	-07:56:42.8	HIP 63548	42.79
2026-05-20 00:00	12:59:01.60	-07:55:25.1	HIP 63548	46.15
2026-05-20 12:00	12:58:48.12	-07:54:08.3	HIP 63270	47.54
2026-05-21 00:00	12:58:34.81	-07:52:52.5	HIP 63270	45.50
2026-05-21 12:00	12:58:21.68	-07:51:37.6	HIP 63270	43.67
2026-05-22 00:00	12:58:08.72	-07:50:23.7	HIP 63270	42.08
2026-05-22 12:00	12:57:55.94	-07:49:10.9	HIP 63270	40.72
2026-05-23 00:00	12:57:43.34	-07:47:59.0	HIP 63270	39.63
2026-05-23 12:00	12:57:30.92	-07:46:48.1	HIP 63270	38.81
2026-05-24 00:00	12:57:18.68	-07:45:38.2	HIP 63270	38.25
2026-05-24 12:00	12:57:06.62	-07:44:29.3	HIP 63270	37.97
2026-05-25 00:00	12:56:54.74	-07:43:21.5	HIP 62991	37.25
2026-05-25 12:00	12:56:43.05	-07:42:14.7	HIP 62991	34.20
2026-05-26 00:00	12:56:31.54	-07:41:08.9	HIP 62991	31.21
2026-05-26 12:00	12:56:20.21	-07:40:04.2	HIP 62991	28.29
2026-05-27 00:00	12:56:09.07	-07:39:00.5	HIP 62991	25.43
2026-05-27 12:00	12:55:58.12	-07:37:57.9	HIP 62991	22.64
2026-05-28 00:00	12:55:47.35	-07:36:56.4	HIP 62991	19.94
2026-05-28 12:00	12:55:36.77	-07:35:55.9	HIP 62991	17.33
2026-05-29 00:00	12:55:26.38	-07:34:56.5	HIP 62991	14.84
2026-05-29 12:00	12:55:16.18	-07:33:58.2	HIP 62991	12.50
2026-05-30 00:00	12:55:06.17	-07:33:01.0	HIP 62991	10.38
2026-05-30 12:00	12:54:56.35	-07:32:04.9	HIP 62991	8.60
2026-05-31 00:00	12:54:46.72	-07:31:09.9	HIP 62991	7.34
2026-05-31 12:00	12:54:37.28	-07:30:16.0	HIP 62991	6.86
2026-06-01 00:00	12:54:28.04	-07:29:23.2	HIP 62991	7.24
2026-06-01 12:00	12:54:18.99	-07:28:31.5	HIP 62991	8.33
2026-06-02 00:00	12:54:10.13	-07:27:41.0	HIP 62991	9.86