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) |
| 2026-05-12 00:00 |
15:54:23.34 |
-15:03:53.8 |
HIP 77872 |
6.35 |
| 2026-05-12 12:00 |
15:54:08.63 |
-15:03:02.1 |
HIP 77872 |
4.26 |
| 2026-05-13 00:00 |
15:53:53.88 |
-15:02:10.3 |
HIP 77872 |
4.77 |
| 2026-05-13 12:00 |
15:53:39.08 |
-15:01:18.6 |
HIP 77872 |
7.37 |
| 2026-05-14 00:00 |
15:53:24.25 |
-15:00:27.0 |
HIP 77872 |
10.64 |
| 2026-05-14 12:00 |
15:53:09.38 |
-14:59:35.4 |
HIP 77872 |
14.12 |
| 2026-05-15 00:00 |
15:52:54.47 |
-14:58:43.8 |
HIP 77809 |
16.70 |
| 2026-05-15 12:00 |
15:52:39.53 |
-14:57:52.3 |
HIP 77686 |
16.06 |
| 2026-05-16 00:00 |
15:52:24.56 |
-14:57:00.9 |
HIP 77686 |
12.40 |
| 2026-05-16 12:00 |
15:52:09.55 |
-14:56:09.6 |
HIP 77686 |
8.77 |
| 2026-05-17 00:00 |
15:51:54.52 |
-14:55:18.3 |
HIP 77686 |
5.27 |
| 2026-05-17 12:00 |
15:51:39.47 |
-14:54:27.1 |
HIP 77686 |
2.55 |
| 2026-05-18 00:00 |
15:51:24.39 |
-14:53:36.1 |
HIP 77686 |
3.63 |
| 2026-05-18 12:00 |
15:51:09.29 |
-14:52:45.1 |
HIP 77686 |
6.92 |
| 2026-05-19 00:00 |
15:50:54.17 |
-14:51:54.3 |
HIP 77686 |
10.53 |
| 2026-05-19 12:00 |
15:50:39.04 |
-14:51:03.5 |
HIP 77686 |
14.21 |
| 2026-05-20 00:00 |
15:50:23.89 |
-14:50:12.9 |
HIP 77686 |
17.93 |
| 2026-05-20 12:00 |
15:50:08.73 |
-14:49:22.4 |
HIP 77510 |
18.81 |
| 2026-05-21 00:00 |
15:49:53.56 |
-14:48:32.1 |
HIP 77510 |
16.72 |
| 2026-05-21 12:00 |
15:49:38.38 |
-14:47:41.9 |
HIP 77510 |
15.28 |
| 2026-05-22 00:00 |
15:49:23.20 |
-14:46:51.9 |
HIP 77510 |
14.69 |
| 2026-05-22 12:00 |
15:49:08.01 |
-14:46:02.0 |
HIP 77510 |
15.06 |
| 2026-05-23 00:00 |
15:48:52.82 |
-14:45:12.3 |
HIP 77510 |
16.31 |
| 2026-05-23 12:00 |
15:48:37.63 |
-14:44:22.8 |
HIP 77366 |
16.83 |
| 2026-05-24 00:00 |
15:48:22.45 |
-14:43:33.4 |
HIP 77366 |
13.16 |
| 2026-05-24 12:00 |
15:48:07.27 |
-14:42:44.3 |
HIP 77366 |
9.57 |
| 2026-05-25 00:00 |
15:47:52.09 |
-14:41:55.3 |
HIP 77366 |
6.17 |
| 2026-05-25 12:00 |
15:47:36.92 |
-14:41:06.5 |
HIP 77366 |
3.61 |
| 2026-05-26 00:00 |
15:47:21.77 |
-14:40:17.9 |
HIP 77366 |
4.02 |
| 2026-05-26 12:00 |
15:47:06.63 |
-14:39:29.6 |
HIP 77366 |
6.89 |
| 2026-05-27 00:00 |
15:46:51.50 |
-14:38:41.4 |
HIP 77366 |
10.34 |
| 2026-05-27 12:00 |
15:46:36.39 |
-14:37:53.5 |
HIP 77366 |
13.94 |
| 2026-05-28 00:00 |
15:46:21.29 |
-14:37:05.8 |
HIP 77366 |
17.59 |
| 2026-05-28 12:00 |
15:46:06.22 |
-14:36:18.4 |
HIP 77366 |
21.27 |
| 2026-05-29 00:00 |
15:45:51.17 |
-14:35:31.1 |
HIP 77154 |
20.75 |
| 2026-05-29 12:00 |
15:45:36.15 |
-14:34:44.2 |
HIP 77154 |
18.57 |
| 2026-05-30 00:00 |
15:45:21.15 |
-14:33:57.5 |
HIP 77154 |
16.95 |
| 2026-05-30 12:00 |
15:45:06.18 |
-14:33:11.0 |
HIP 77154 |
16.04 |
| 2026-05-31 00:00 |
15:44:51.23 |
-14:32:24.9 |
HIP 77154 |
15.96 |
| 2026-05-31 12:00 |
15:44:36.33 |
-14:31:39.0 |
HIP 77154 |
16.73 |
| 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 |