메타데이터

항목	값
Designation	285P/LINEAR
Type	P
Perihelion (tp_cal, UTC)	2023-01-12T20:28:47.072640Z
Orbit solution date (soln_date, UTC)	2024-06-06T23:12:48Z
Obs used	933
NEO	-
M1	13.600
K1	4.500
PC	-

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2020-02-29.0000000
e	0.61787770
q (au)	1.723017
a (au)	4.509072
i (deg)	25.023386
Ω (om, deg)	185.483345
ω (w, deg)	178.401291
M (ma, deg)	252.033734

밝기

산란 + 전체 선형

$$ M_a = (15.549 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	15.549
n	2.000
gf	1.000
gb	-1.000
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
2022-06-28	2022-08-13	+85.0046	-30.978
2022-08-13	2023-01-09	-1.4071	+0.571

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

찾아보기

천체력

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-06-01 00:00	10:36:09.04	+00:34:46.2	HIP 51895	6.39
2026-06-01 12:00	10:36:14.23	+00:35:18.5	HIP 51895	5.98
2026-06-02 00:00	10:36:19.54	+00:35:50.0	HIP 51895	5.92
2026-06-02 12:00	10:36:24.98	+00:36:20.6	HIP 51895	6.23
2026-06-03 00:00	10:36:30.53	+00:36:50.2	HIP 51895	6.87
2026-06-03 12:00	10:36:36.20	+00:37:19.0	HIP 51895	7.77
2026-06-04 00:00	10:36:42.00	+00:37:46.9	HIP 51895	8.87
2026-06-04 12:00	10:36:47.90	+00:38:13.9	HIP 51895	10.11
2026-06-05 00:00	10:36:53.93	+00:38:40.0	HIP 51895	11.46
2026-06-05 12:00	10:37:00.07	+00:39:05.2	HIP 51895	12.89
2026-06-06 00:00	10:37:06.33	+00:39:29.5	HIP 51895	14.38
2026-06-06 12:00	10:37:12.70	+00:39:52.9	HIP 51895	15.93
2026-06-07 00:00	10:37:19.19	+00:40:15.4	HIP 51895	17.52
2026-06-07 12:00	10:37:25.80	+00:40:37.1	HIP 51895	19.16
2026-06-08 00:00	10:37:32.52	+00:40:57.9	HIP 51895	20.83
2026-06-08 12:00	10:37:39.35	+00:41:17.8	HIP 51895	22.54
2026-06-09 00:00	10:37:46.29	+00:41:36.8	HIP 51895	24.28
2026-06-09 12:00	10:37:53.35	+00:41:54.9	HIP 51895	26.05
2026-06-10 00:00	10:38:00.52	+00:42:12.2	HIP 51895	27.85
2026-06-10 12:00	10:38:07.80	+00:42:28.6	HIP 51895	29.68
2026-06-11 00:00	10:38:15.19	+00:42:44.1	HIP 51895	31.54
2026-06-11 12:00	10:38:22.69	+00:42:58.7	HIP 52058	31.69
2026-06-12 00:00	10:38:30.30	+00:43:12.5	HIP 52058	31.60
2026-06-12 12:00	10:38:38.02	+00:43:25.4	HIP 52058	31.65
2026-06-13 00:00	10:38:45.85	+00:43:37.4	HIP 52058	31.83
2026-06-13 12:00	10:38:53.79	+00:43:48.6	HIP 52267	31.39
2026-06-14 00:00	10:39:01.83	+00:43:58.9	HIP 52267	29.65
2026-06-14 12:00	10:39:09.98	+00:44:08.4	HIP 52267	27.92
2026-06-15 00:00	10:39:18.24	+00:44:17.0	HIP 52267	26.21
2026-06-15 12:00	10:39:26.60	+00:44:24.7	HIP 52267	24.52
2026-06-16 00:00	10:39:35.07	+00:44:31.6	HIP 52267	22.88
2026-06-16 12:00	10:39:43.64	+00:44:37.6	HIP 52267	21.28
2026-06-17 00:00	10:39:52.32	+00:44:42.8	HIP 52267	19.76
2026-06-17 12:00	10:40:01.10	+00:44:47.2	HIP 52267	18.35
2026-06-18 00:00	10:40:09.97	+00:44:50.7	HIP 52267	17.08
2026-06-18 12:00	10:40:18.95	+00:44:53.4	HIP 52267	15.99
2026-06-19 00:00	10:40:28.04	+00:44:55.2	HIP 52267	15.13
2026-06-19 12:00	10:40:37.22	+00:44:56.3	HIP 52267	14.57
2026-06-20 00:00	10:40:46.50	+00:44:56.5	HIP 52267	14.34
2026-06-20 12:00	10:40:55.87	+00:44:55.8	HIP 52267	14.47
2026-06-21 00:00	10:41:05.35	+00:44:54.4	HIP 52267	14.97
2026-06-21 12:00	10:41:14.92	+00:44:52.2	HIP 52267	15.80
2026-06-22 00:00	10:41:24.59	+00:44:49.1	HIP 52377	15.89