メタデータ
| 項目 |
値 |
| Designation |
307P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-12-20T02:14:44.448000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:19Z |
| Obs used |
220 |
| NEO |
- |
| M1 |
13.100 |
| K1 |
15.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-03-15.0000000 |
| e |
0.67474337 |
| q (au) |
1.888711 |
| a (au) |
5.806833 |
| i (deg) |
4.424845 |
| Ω (om, deg) |
158.120857 |
| ω (w, deg) |
222.112616 |
| M (ma, deg) |
314.562147 |
等級
散乱 + 全体線形
$$
M_a = (12.505 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.505 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.912 |
| 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) |
| 2026-06-01 00:00 |
15:44:21.45 |
-14:30:53.3 |
HIP 77154 |
18.22 |
| 2026-06-01 12:00 |
15:44:06.61 |
-14:30:08.0 |
HIP 77154 |
20.27 |
| 2026-06-02 00:00 |
15:43:51.81 |
-14:29:23.0 |
HIP 77154 |
22.73 |
| 2026-06-02 12:00 |
15:43:37.05 |
-14:28:38.2 |
HIP 77154 |
25.48 |
| 2026-06-03 00:00 |
15:43:22.33 |
-14:27:53.8 |
HIP 77154 |
28.42 |
| 2026-06-03 12:00 |
15:43:07.65 |
-14:27:09.6 |
HIP 77154 |
31.50 |
| 2026-06-04 00:00 |
15:42:53.02 |
-14:26:25.8 |
HIP 77154 |
34.68 |
| 2026-06-04 12:00 |
15:42:38.43 |
-14:25:42.4 |
HIP 76816 |
33.26 |
| 2026-06-05 00:00 |
15:42:23.90 |
-14:24:59.2 |
HIP 76743 |
31.36 |
| 2026-06-05 12:00 |
15:42:09.41 |
-14:24:16.4 |
HIP 76743 |
28.12 |
| 2026-06-06 00:00 |
15:41:54.98 |
-14:23:33.9 |
HIP 76743 |
24.99 |
| 2026-06-06 12:00 |
15:41:40.60 |
-14:22:51.8 |
HIP 76743 |
22.00 |
| 2026-06-07 00:00 |
15:41:26.28 |
-14:22:10.0 |
HIP 76743 |
19.21 |
| 2026-06-07 12:00 |
15:41:12.02 |
-14:21:28.6 |
HIP 76743 |
16.71 |
| 2026-06-08 00:00 |
15:40:57.82 |
-14:20:47.6 |
HIP 76743 |
14.64 |
| 2026-06-08 12:00 |
15:40:43.67 |
-14:20:06.9 |
HIP 76743 |
13.20 |
| 2026-06-09 00:00 |
15:40:29.60 |
-14:19:26.7 |
HIP 76743 |
12.58 |
| 2026-06-09 12:00 |
15:40:15.59 |
-14:18:46.8 |
HIP 76743 |
12.90 |
| 2026-06-10 00:00 |
15:40:01.64 |
-14:18:07.3 |
HIP 76743 |
14.07 |
| 2026-06-10 12:00 |
15:39:47.77 |
-14:17:28.2 |
HIP 76708 |
14.13 |
| 2026-06-11 00:00 |
15:39:33.96 |
-14:16:49.5 |
HIP 76708 |
13.98 |
| 2026-06-11 12:00 |
15:39:20.23 |
-14:16:11.2 |
HIP 76708 |
14.64 |
| 2026-06-12 00:00 |
15:39:06.58 |
-14:15:33.4 |
HIP 76708 |
16.01 |
| 2026-06-12 12:00 |
15:38:53.00 |
-14:14:55.9 |
HIP 76562 |
13.32 |
| 2026-06-13 00:00 |
15:38:39.50 |
-14:14:18.9 |
HIP 76562 |
10.61 |
| 2026-06-13 12:00 |
15:38:26.08 |
-14:13:42.4 |
HIP 76562 |
8.37 |
| 2026-06-14 00:00 |
15:38:12.74 |
-14:13:06.2 |
HIP 76562 |
7.04 |
| 2026-06-14 12:00 |
15:37:59.49 |
-14:12:30.6 |
HIP 76562 |
7.12 |
| 2026-06-15 00:00 |
15:37:46.32 |
-14:11:55.4 |
HIP 76562 |
8.54 |
| 2026-06-15 12:00 |
15:37:33.24 |
-14:11:20.6 |
HIP 76562 |
10.77 |
| 2026-06-16 00:00 |
15:37:20.25 |
-14:10:46.3 |
HIP 76562 |
13.39 |
| 2026-06-16 12:00 |
15:37:07.35 |
-14:10:12.5 |
HIP 76562 |
16.21 |
| 2026-06-17 00:00 |
15:36:54.54 |
-14:09:39.2 |
HIP 76562 |
19.11 |
| 2026-06-17 12:00 |
15:36:41.83 |
-14:09:06.3 |
HIP 76562 |
22.07 |
| 2026-06-18 00:00 |
15:36:29.22 |
-14:08:34.0 |
HIP 76562 |
25.04 |
| 2026-06-18 12:00 |
15:36:16.70 |
-14:08:02.1 |
HIP 76562 |
28.02 |
| 2026-06-19 00:00 |
15:36:04.28 |
-14:07:30.7 |
HIP 76209 |
29.94 |
| 2026-06-19 12:00 |
15:35:51.96 |
-14:06:59.8 |
HIP 76209 |
27.16 |
| 2026-06-20 00:00 |
15:35:39.74 |
-14:06:29.4 |
HIP 76209 |
24.45 |
| 2026-06-20 12:00 |
15:35:27.63 |
-14:05:59.6 |
HIP 76209 |
21.83 |
| 2026-06-21 00:00 |
15:35:15.62 |
-14:05:30.2 |
HIP 76209 |
19.35 |
| 2026-06-21 12:00 |
15:35:03.72 |
-14:05:01.4 |
HIP 76209 |
17.03 |
| 2026-06-22 00:00 |
15:34:51.93 |
-14:04:33.0 |
HIP 76209 |
14.93 |