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) |
| 2026-09-20 00:00 |
15:38:01.01 |
-15:12:41.0 |
HIP 76458 |
24.26 |
| 2026-09-20 12:00 |
15:38:14.72 |
-15:13:44.0 |
HIP 76458 |
25.86 |
| 2026-09-21 00:00 |
15:38:28.55 |
-15:14:47.3 |
HIP 76458 |
27.83 |
| 2026-09-21 12:00 |
15:38:42.50 |
-15:15:50.8 |
HIP 76458 |
30.09 |
| 2026-09-22 00:00 |
15:38:56.55 |
-15:16:54.5 |
HIP 76527 |
31.26 |
| 2026-09-22 12:00 |
15:39:10.72 |
-15:17:58.4 |
HIP 76527 |
32.45 |
| 2026-09-23 00:00 |
15:39:25.00 |
-15:19:02.5 |
HIP 76527 |
33.99 |
| 2026-09-23 12:00 |
15:39:39.39 |
-15:20:06.8 |
HIP 76857 |
32.10 |
| 2026-09-24 00:00 |
15:39:53.89 |
-15:21:11.3 |
HIP 76857 |
28.48 |
| 2026-09-24 12:00 |
15:40:08.50 |
-15:22:16.0 |
HIP 76857 |
24.85 |
| 2026-09-25 00:00 |
15:40:23.22 |
-15:23:20.9 |
HIP 76857 |
21.21 |
| 2026-09-25 12:00 |
15:40:38.05 |
-15:24:26.0 |
HIP 76857 |
17.57 |
| 2026-09-26 00:00 |
15:40:52.98 |
-15:25:31.2 |
HIP 76857 |
13.96 |
| 2026-09-26 12:00 |
15:41:08.02 |
-15:26:36.7 |
HIP 76857 |
10.44 |
| 2026-09-27 00:00 |
15:41:23.17 |
-15:27:42.3 |
HIP 76857 |
7.17 |
| 2026-09-27 12:00 |
15:41:38.43 |
-15:28:48.0 |
HIP 76857 |
4.78 |
| 2026-09-28 00:00 |
15:41:53.79 |
-15:29:54.0 |
HIP 76895 |
4.55 |
| 2026-09-28 12:00 |
15:42:09.26 |
-15:31:00.1 |
HIP 76895 |
3.48 |
| 2026-09-29 00:00 |
15:42:24.83 |
-15:32:06.3 |
HIP 76895 |
5.83 |
| 2026-09-29 12:00 |
15:42:40.51 |
-15:33:12.7 |
HIP 76895 |
9.32 |
| 2026-09-30 00:00 |
15:42:56.29 |
-15:34:19.3 |
HIP 76895 |
13.09 |
| 2026-09-30 12:00 |
15:43:12.17 |
-15:35:26.0 |
HIP 77060 |
13.51 |
| 2026-10-01 00:00 |
15:43:28.15 |
-15:36:32.8 |
HIP 77060 |
9.53 |
| 2026-10-01 12:00 |
15:43:44.24 |
-15:37:39.8 |
HIP 77060 |
5.56 |
| 2026-10-02 00:00 |
15:44:00.43 |
-15:38:46.9 |
HIP 77060 |
1.85 |
| 2026-10-02 12:00 |
15:44:16.72 |
-15:39:54.1 |
HIP 77060 |
3.00 |
| 2026-10-03 00:00 |
15:44:33.11 |
-15:41:01.5 |
HIP 77060 |
6.94 |
| 2026-10-03 12:00 |
15:44:49.60 |
-15:42:09.0 |
HIP 77060 |
11.02 |
| 2026-10-04 00:00 |
15:45:06.19 |
-15:43:16.6 |
HIP 77060 |
15.15 |
| 2026-10-04 12:00 |
15:45:22.88 |
-15:44:24.3 |
HIP 77060 |
19.31 |
| 2026-10-05 00:00 |
15:45:39.67 |
-15:45:32.1 |
HIP 77060 |
23.50 |
| 2026-10-05 12:00 |
15:45:56.55 |
-15:46:40.1 |
HIP 77250 |
23.94 |
| 2026-10-06 00:00 |
15:46:13.53 |
-15:47:48.1 |
HIP 77250 |
22.03 |
| 2026-10-06 12:00 |
15:46:30.61 |
-15:48:56.2 |
HIP 77250 |
20.81 |
| 2026-10-07 00:00 |
15:46:47.79 |
-15:50:04.5 |
HIP 77250 |
20.42 |
| 2026-10-07 12:00 |
15:47:05.06 |
-15:51:12.8 |
HIP 77334 |
19.49 |
| 2026-10-08 00:00 |
15:47:22.42 |
-15:52:21.2 |
HIP 77334 |
18.17 |
| 2026-10-08 12:00 |
15:47:39.88 |
-15:53:29.6 |
HIP 77334 |
17.84 |
| 2026-10-09 00:00 |
15:47:57.43 |
-15:54:38.2 |
HIP 77334 |
18.56 |
| 2026-10-09 12:00 |
15:48:15.08 |
-15:55:46.8 |
HIP 77334 |
20.24 |
| 2026-10-10 00:00 |
15:48:32.81 |
-15:56:55.5 |
HIP 77334 |
22.67 |
| 2026-10-10 12:00 |
15:48:50.64 |
-15:58:04.2 |
HIP 77334 |
25.65 |
| 2026-10-11 00:00 |
15:49:08.56 |
-15:59:13.0 |
HIP 77471 |
27.09 |