メタデータ

項目	値
Designation	294P/LINEAR
Type	P
Perihelion (tp_cal, UTC)	2014-03-03T01:25:54.598080Z
Orbit solution date (soln_date, UTC)	2026-08-07T12:42:26Z
Obs used	275
NEO	Yes
M1	17.900
K1	4.500
PC	-

オスキュレーティング軌道要素

項目	値
Epoch (epoch_cal, TDB)	2012-10-28.0000000
e	0.59515147
q (au)	1.296873
a (au)	3.203352
i (deg)	18.214398
Ω (om, deg)	312.814467
ω (w, deg)	235.349279
M (ma, deg)	275.582741

等級

散乱 + 全体線形

$$ M_a = (16.285 + 2.939\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目	値
H0	16.285
n	2.939
gf	1.000
gb	-1.000
k	0.999
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

ファインディングチャート

天体暦

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-09-20 00:00	20:53:00.55	-11:40:32.5	HIP 103077	6.24
2026-09-20 12:00	20:52:48.76	-11:40:50.8	HIP 103077	7.63
2026-09-21 00:00	20:52:37.28	-11:41:08.4	HIP 103077	9.65
2026-09-21 12:00	20:52:26.11	-11:41:25.1	HIP 103077	11.93
2026-09-22 00:00	20:52:15.26	-11:41:41.1	HIP 103077	14.30
2026-09-22 12:00	20:52:04.71	-11:41:56.2	HIP 102994	15.60
2026-09-23 00:00	20:51:54.47	-11:42:10.6	HIP 102994	15.88
2026-09-23 12:00	20:51:44.54	-11:42:24.1	HIP 102994	16.51
2026-09-24 00:00	20:51:34.92	-11:42:36.9	HIP 102994	17.43
2026-09-24 12:00	20:51:25.61	-11:42:48.8	HIP 102994	18.56
2026-09-25 00:00	20:51:16.61	-11:43:00.0	HIP 102994	19.83
2026-09-25 12:00	20:51:07.92	-11:43:10.3	HIP 102994	21.20
2026-09-26 00:00	20:50:59.53	-11:43:19.8	HIP 102994	22.63
2026-09-26 12:00	20:50:51.45	-11:43:28.5	HIP 102994	24.09
2026-09-27 00:00	20:50:43.67	-11:43:36.4	HIP 102785	25.23
2026-09-27 12:00	20:50:36.21	-11:43:43.5	HIP 102785	23.94
2026-09-28 00:00	20:50:29.04	-11:43:49.7	HIP 102785	22.78
2026-09-28 12:00	20:50:22.18	-11:43:55.2	HIP 102785	21.72
2026-09-29 00:00	20:50:15.62	-11:43:59.8	HIP 102785	20.79
2026-09-29 12:00	20:50:09.37	-11:44:03.6	HIP 102785	19.97
2026-09-30 00:00	20:50:03.42	-11:44:06.5	HIP 102785	19.26
2026-09-30 12:00	20:49:57.77	-11:44:08.7	HIP 102785	18.65
2026-10-01 00:00	20:49:52.42	-11:44:10.0	HIP 102785	18.15
2026-10-01 12:00	20:49:47.37	-11:44:10.5	HIP 102785	17.74
2026-10-02 00:00	20:49:42.61	-11:44:10.1	HIP 102785	17.41
2026-10-02 12:00	20:49:38.16	-11:44:09.0	HIP 102785	17.16
2026-10-03 00:00	20:49:34.01	-11:44:07.0	HIP 102785	16.96
2026-10-03 12:00	20:49:30.15	-11:44:04.1	HIP 102785	16.82
2026-10-04 00:00	20:49:26.58	-11:44:00.4	HIP 102785	16.71
2026-10-04 12:00	20:49:23.32	-11:43:55.9	HIP 102785	16.64
2026-10-05 00:00	20:49:20.34	-11:43:50.5	HIP 102785	16.59
2026-10-05 12:00	20:49:17.66	-11:43:44.3	HIP 102785	16.54
2026-10-06 00:00	20:49:15.28	-11:43:37.2	HIP 102785	16.50
2026-10-06 12:00	20:49:13.18	-11:43:29.3	HIP 102785	16.45
2026-10-07 00:00	20:49:11.38	-11:43:20.5	HIP 102785	16.39
2026-10-07 12:00	20:49:09.86	-11:43:10.9	HIP 102785	16.32
2026-10-08 00:00	20:49:08.64	-11:43:00.4	HIP 102785	16.22
2026-10-08 12:00	20:49:07.70	-11:42:49.0	HIP 102785	16.09
2026-10-09 00:00	20:49:07.05	-11:42:36.8	HIP 102785	15.94
2026-10-09 12:00	20:49:06.68	-11:42:23.7	HIP 102785	15.76
2026-10-10 00:00	20:49:06.60	-11:42:09.8	HIP 102785	15.54
2026-10-10 12:00	20:49:06.80	-11:41:55.0	HIP 102785	15.29
2026-10-11 00:00	20:49:07.29	-11:41:39.3	HIP 102785	15.00