メタデータ
| 項目 |
値 |
| Designation |
C/1980 L1 (Torres) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1980-04-19T20:41:49.355520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
58 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
18.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1980-07-25.0000000 |
| e |
1.00017950 |
| q (au) |
2.583907 |
| a (au) |
-14395.126523 |
| i (deg) |
73.148059 |
| Ω (om, deg) |
279.523106 |
| ω (w, deg) |
334.966178 |
| M (ma, deg) |
0.000055 |
等級
散乱 + 全体線形
$$
M_a = (9.586 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.586 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.529 |
| 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 |
05:09:49.14 |
+67:42:51.8 |
HIP 24255 |
14.76 |
| 2026-09-20 12:00 |
05:09:48.48 |
+67:43:08.3 |
HIP 24255 |
14.86 |
| 2026-09-21 00:00 |
05:09:47.78 |
+67:43:24.8 |
HIP 24255 |
14.97 |
| 2026-09-21 12:00 |
05:09:47.05 |
+67:43:41.3 |
HIP 24255 |
15.09 |
| 2026-09-22 00:00 |
05:09:46.28 |
+67:43:57.7 |
HIP 24255 |
15.22 |
| 2026-09-22 12:00 |
05:09:45.47 |
+67:44:14.1 |
HIP 24255 |
15.35 |
| 2026-09-23 00:00 |
05:09:44.62 |
+67:44:30.5 |
HIP 24255 |
15.49 |
| 2026-09-23 12:00 |
05:09:43.74 |
+67:44:46.8 |
HIP 24255 |
15.64 |
| 2026-09-24 00:00 |
05:09:42.82 |
+67:45:03.1 |
HIP 24255 |
15.79 |
| 2026-09-24 12:00 |
05:09:41.86 |
+67:45:19.3 |
HIP 24255 |
15.95 |
| 2026-09-25 00:00 |
05:09:40.86 |
+67:45:35.5 |
HIP 24255 |
16.12 |
| 2026-09-25 12:00 |
05:09:39.83 |
+67:45:51.6 |
HIP 24255 |
16.29 |
| 2026-09-26 00:00 |
05:09:38.76 |
+67:46:07.7 |
HIP 24255 |
16.47 |
| 2026-09-26 12:00 |
05:09:37.65 |
+67:46:23.7 |
HIP 24255 |
16.66 |
| 2026-09-27 00:00 |
05:09:36.51 |
+67:46:39.7 |
HIP 24255 |
16.85 |
| 2026-09-27 12:00 |
05:09:35.33 |
+67:46:55.7 |
HIP 24255 |
17.05 |
| 2026-09-28 00:00 |
05:09:34.11 |
+67:47:11.5 |
HIP 24255 |
17.25 |
| 2026-09-28 12:00 |
05:09:32.85 |
+67:47:27.4 |
HIP 24255 |
17.46 |
| 2026-09-29 00:00 |
05:09:31.56 |
+67:47:43.2 |
HIP 24255 |
17.67 |
| 2026-09-29 12:00 |
05:09:30.23 |
+67:47:58.9 |
HIP 24255 |
17.89 |
| 2026-09-30 00:00 |
05:09:28.86 |
+67:48:14.5 |
HIP 24255 |
18.12 |
| 2026-09-30 12:00 |
05:09:27.46 |
+67:48:30.2 |
HIP 24255 |
18.34 |
| 2026-10-01 00:00 |
05:09:26.02 |
+67:48:45.7 |
HIP 24255 |
18.58 |
| 2026-10-01 12:00 |
05:09:24.54 |
+67:49:01.2 |
HIP 24255 |
18.81 |
| 2026-10-02 00:00 |
05:09:23.02 |
+67:49:16.6 |
HIP 24255 |
19.05 |
| 2026-10-02 12:00 |
05:09:21.47 |
+67:49:32.0 |
HIP 24255 |
19.30 |
| 2026-10-03 00:00 |
05:09:19.89 |
+67:49:47.3 |
HIP 24255 |
19.55 |
| 2026-10-03 12:00 |
05:09:18.26 |
+67:50:02.5 |
HIP 24255 |
19.80 |
| 2026-10-04 00:00 |
05:09:16.60 |
+67:50:17.7 |
HIP 24255 |
20.06 |
| 2026-10-04 12:00 |
05:09:14.90 |
+67:50:32.8 |
HIP 24255 |
20.32 |
| 2026-10-05 00:00 |
05:09:13.17 |
+67:50:47.8 |
HIP 24255 |
20.58 |
| 2026-10-05 12:00 |
05:09:11.40 |
+67:51:02.7 |
HIP 24255 |
20.85 |
| 2026-10-06 00:00 |
05:09:09.59 |
+67:51:17.6 |
HIP 24255 |
21.12 |
| 2026-10-06 12:00 |
05:09:07.75 |
+67:51:32.4 |
HIP 24255 |
21.39 |
| 2026-10-07 00:00 |
05:09:05.87 |
+67:51:47.2 |
HIP 24255 |
21.67 |
| 2026-10-07 12:00 |
05:09:03.96 |
+67:52:01.8 |
HIP 24255 |
21.95 |
| 2026-10-08 00:00 |
05:09:02.01 |
+67:52:16.4 |
HIP 24255 |
22.23 |
| 2026-10-08 12:00 |
05:09:00.02 |
+67:52:30.9 |
HIP 24255 |
22.51 |
| 2026-10-09 00:00 |
05:08:58.00 |
+67:52:45.3 |
HIP 24255 |
22.80 |
| 2026-10-09 12:00 |
05:08:55.94 |
+67:52:59.6 |
HIP 24255 |
23.09 |
| 2026-10-10 00:00 |
05:08:53.85 |
+67:53:13.9 |
HIP 24255 |
23.38 |
| 2026-10-10 12:00 |
05:08:51.73 |
+67:53:28.0 |
HIP 24044 |
23.44 |
| 2026-10-11 00:00 |
05:08:49.56 |
+67:53:42.1 |
HIP 24044 |
23.28 |