메타데이터

항목	값
Designation	272P/NEAT
Type	P
Perihelion (tp_cal, UTC)	2013-03-01T17:20:56.927040Z
Orbit solution date (soln_date, UTC)	2023-02-22T00:13:19Z
Obs used	189
NEO	-
M1	10.700
K1	18.500
PC	0.030

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2010-04-10.0000000
e	0.45652880
q (au)	2.416276
a (au)	4.446005
i (deg)	18.188178
Ω (om, deg)	111.515253
ω (w, deg)	26.202307
M (ma, deg)	248.900968

밝기

산란 + 전체 선형

$$ M_a = (16.618 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	16.618
n	2.000
gf	1.000
gb	-1.000
k	1.000
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)
2026-09-20 00:00	20:15:59.99	-26:25:01.5	HIP 99884	22.00
2026-09-20 12:00	20:15:54.38	-26:25:17.2	HIP 99884	21.72
2026-09-21 00:00	20:15:48.95	-26:25:32.2	HIP 99884	21.51
2026-09-21 12:00	20:15:43.68	-26:25:46.5	HIP 99884	21.38
2026-09-22 00:00	20:15:38.58	-26:26:00.1	HIP 99884	21.33
2026-09-22 12:00	20:15:33.66	-26:26:13.0	HIP 99884	21.34
2026-09-23 00:00	20:15:28.90	-26:26:25.3	HIP 99884	21.41
2026-09-23 12:00	20:15:24.31	-26:26:36.9	HIP 99884	21.53
2026-09-24 00:00	20:15:19.88	-26:26:47.8	HIP 99884	21.70
2026-09-24 12:00	20:15:15.63	-26:26:58.0	HIP 99884	21.90
2026-09-25 00:00	20:15:11.55	-26:27:07.6	HIP 99884	22.14
2026-09-25 12:00	20:15:07.64	-26:27:16.5	HIP 99884	22.41
2026-09-26 00:00	20:15:03.91	-26:27:24.8	HIP 99884	22.70
2026-09-26 12:00	20:15:00.34	-26:27:32.4	HIP 99884	23.01
2026-09-27 00:00	20:14:56.94	-26:27:39.4	HIP 99884	23.33
2026-09-27 12:00	20:14:53.71	-26:27:45.7	HIP 99884	23.65
2026-09-28 00:00	20:14:50.66	-26:27:51.3	HIP 99884	23.98
2026-09-28 12:00	20:14:47.78	-26:27:56.3	HIP 99884	24.31
2026-09-29 00:00	20:14:45.06	-26:28:00.7	HIP 99884	24.63
2026-09-29 12:00	20:14:42.52	-26:28:04.4	HIP 99884	24.95
2026-09-30 00:00	20:14:40.15	-26:28:07.5	HIP 99884	25.26
2026-09-30 12:00	20:14:37.96	-26:28:10.0	HIP 99884	25.56
2026-10-01 00:00	20:14:35.93	-26:28:11.8	HIP 99884	25.84
2026-10-01 12:00	20:14:34.08	-26:28:13.0	HIP 99884	26.11
2026-10-02 00:00	20:14:32.40	-26:28:13.6	HIP 99884	26.37
2026-10-02 12:00	20:14:30.89	-26:28:13.5	HIP 99884	26.61
2026-10-03 00:00	20:14:29.56	-26:28:12.9	HIP 99884	26.83
2026-10-03 12:00	20:14:28.39	-26:28:11.6	HIP 99613	26.63
2026-10-04 00:00	20:14:27.40	-26:28:09.7	HIP 99613	26.44
2026-10-04 12:00	20:14:26.59	-26:28:07.2	HIP 99613	26.27
2026-10-05 00:00	20:14:25.94	-26:28:04.1	HIP 99613	26.13
2026-10-05 12:00	20:14:25.47	-26:28:00.4	HIP 99613	26.01
2026-10-06 00:00	20:14:25.17	-26:27:56.1	HIP 99613	25.91
2026-10-06 12:00	20:14:25.04	-26:27:51.1	HIP 99613	25.84
2026-10-07 00:00	20:14:25.09	-26:27:45.6	HIP 99613	25.79
2026-10-07 12:00	20:14:25.31	-26:27:39.5	HIP 99613	25.76
2026-10-08 00:00	20:14:25.70	-26:27:32.8	HIP 99613	25.76
2026-10-08 12:00	20:14:26.26	-26:27:25.5	HIP 99613	25.78
2026-10-09 00:00	20:14:27.00	-26:27:17.6	HIP 99613	25.83
2026-10-09 12:00	20:14:27.91	-26:27:09.1	HIP 99613	25.91
2026-10-10 00:00	20:14:28.99	-26:27:00.1	HIP 99613	26.01
2026-10-10 12:00	20:14:30.24	-26:26:50.5	HIP 99613	26.14
2026-10-11 00:00	20:14:31.67	-26:26:40.3	HIP 99613	26.30