メタデータ

項目	値
Designation	241P/LINEAR
Type	P
Perihelion (tp_cal, UTC)	2010-07-17T08:34:46.513920Z
Orbit solution date (soln_date, UTC)	2022-05-06T00:43:04Z
Obs used	874
NEO	-
M1	14.300
K1	7.250
PC	-

オスキュレーティング軌道要素

項目	値
Epoch (epoch_cal, TDB)	2015-01-18.0000000
e	0.60991749
q (au)	1.932371
a (au)	4.953749
i (deg)	20.868312
Ω (om, deg)	305.806635
ω (w, deg)	110.525675
M (ma, deg)	147.108792

等級

散乱 + 全体線形

$$ M_a = (12.777 + 3.761\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目	値
H0	12.777
n	3.761
gf	1.000
gb	-0.932
k	1.000
δ90	10.000

パラメータ	記号	範囲	説明
太陽・地球距離が1 AUのときの絶対等級	H0	-5 to 20	彗星の固有の明るさ
測光スロープパラメータ	n	2 to 6	太陽距離に対する明るさ変化率
前方散乱非対称係数	gf	0.8 to 1	前方散乱の強さ
後方散乱非対称係数	gb	-1 to -0.5	後方散乱の強さ
分配係数	k	0.8 to 1	前方/後方散乱の寄与比
ダスト/ガス明るさ比	δ90	1 to 10	ダスト散乱とガス放射の相対寄与

参考: EPSC-DPS2025-160

天体暦

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-07-29 00:00	14:23:55.71	-36:17:10.0	HIP 70242	21.55
2026-07-29 12:00	14:23:59.16	-36:15:56.8	HIP 70242	21.71
2026-07-30 00:00	14:24:02.74	-36:14:44.3	HIP 70242	21.99
2026-07-30 12:00	14:24:06.47	-36:13:32.5	HIP 70242	22.38
2026-07-31 00:00	14:24:10.33	-36:12:21.5	HIP 70242	22.89
2026-07-31 12:00	14:24:14.34	-36:11:11.1	HIP 70242	23.50
2026-08-01 00:00	14:24:18.48	-36:10:01.3	HIP 70242	24.21
2026-08-01 12:00	14:24:22.76	-36:08:52.3	HIP 70242	25.00
2026-08-02 00:00	14:24:27.18	-36:07:44.0	HIP 70242	25.89
2026-08-02 12:00	14:24:31.74	-36:06:36.4	HIP 70242	26.85
2026-08-03 00:00	14:24:36.43	-36:05:29.6	HIP 70242	27.87
2026-08-03 12:00	14:24:41.27	-36:04:23.4	HIP 70242	28.97
2026-08-04 00:00	14:24:46.23	-36:03:17.9	HIP 70242	30.12
2026-08-04 12:00	14:24:51.34	-36:02:13.2	HIP 70242	31.32
2026-08-05 00:00	14:24:56.58	-36:01:09.1	HIP 70242	32.57
2026-08-05 12:00	14:25:01.95	-36:00:05.8	HIP 70380	32.96
2026-08-06 00:00	14:25:07.46	-35:59:03.3	HIP 70380	32.47
2026-08-06 12:00	14:25:13.10	-35:58:01.4	HIP 70380	32.08
2026-08-07 00:00	14:25:18.88	-35:57:00.3	HIP 70380	31.78
2026-08-07 12:00	14:25:24.79	-35:55:59.9	HIP 70380	31.58
2026-08-08 00:00	14:25:30.83	-35:55:00.2	HIP 70380	31.48
2026-08-08 12:00	14:25:37.01	-35:54:01.3	HIP 70380	31.49
2026-08-09 00:00	14:25:43.31	-35:53:03.1	HIP 70380	31.60
2026-08-09 12:00	14:25:49.75	-35:52:05.7	HIP 70380	31.83
2026-08-10 00:00	14:25:56.32	-35:51:09.0	HIP 70693	31.06
2026-08-10 12:00	14:26:03.02	-35:50:13.1	HIP 70693	29.49
2026-08-11 00:00	14:26:09.85	-35:49:17.9	HIP 70693	27.92
2026-08-11 12:00	14:26:16.80	-35:48:23.4	HIP 70693	26.36
2026-08-12 00:00	14:26:23.89	-35:47:29.8	HIP 70693	24.81
2026-08-12 12:00	14:26:31.11	-35:46:36.8	HIP 70693	23.28
2026-08-13 00:00	14:26:38.45	-35:45:44.6	HIP 70693	21.77
2026-08-13 12:00	14:26:45.92	-35:44:53.2	HIP 70693	20.29
2026-08-14 00:00	14:26:53.51	-35:44:02.6	HIP 70693	18.86
2026-08-14 12:00	14:27:01.24	-35:43:12.6	HIP 70693	17.50
2026-08-15 00:00	14:27:09.08	-35:42:23.5	HIP 70693	16.22
2026-08-15 12:00	14:27:17.05	-35:41:35.1	HIP 70693	15.05
2026-08-16 00:00	14:27:25.15	-35:40:47.5	HIP 70693	14.02
2026-08-16 12:00	14:27:33.36	-35:40:00.6	HIP 70693	13.19
2026-08-17 00:00	14:27:41.70	-35:39:14.5	HIP 70693	12.59
2026-08-17 12:00	14:27:50.16	-35:38:29.2	HIP 70693	12.27
2026-08-18 00:00	14:27:58.75	-35:37:44.6	HIP 70693	12.25
2026-08-18 12:00	14:28:07.45	-35:37:00.8	HIP 70693	12.55
2026-08-19 00:00	14:28:16.27	-35:36:17.7	HIP 70693	13.15