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) |
| 2026-03-26 00:00 |
04:52:50.56 |
+67:23:03.3 |
HIP 22768 |
8.54 |
| 2026-03-26 12:00 |
04:52:52.13 |
+67:22:46.4 |
HIP 22768 |
8.65 |
| 2026-03-27 00:00 |
04:52:53.74 |
+67:22:29.6 |
HIP 22768 |
8.76 |
| 2026-03-27 12:00 |
04:52:55.39 |
+67:22:12.9 |
HIP 22768 |
8.88 |
| 2026-03-28 00:00 |
04:52:57.07 |
+67:21:56.3 |
HIP 22768 |
9.01 |
| 2026-03-28 12:00 |
04:52:58.78 |
+67:21:39.7 |
HIP 22768 |
9.14 |
| 2026-03-29 00:00 |
04:53:00.53 |
+67:21:23.2 |
HIP 22768 |
9.28 |
| 2026-03-29 12:00 |
04:53:02.31 |
+67:21:06.9 |
HIP 22768 |
9.43 |
| 2026-03-30 00:00 |
04:53:04.12 |
+67:20:50.5 |
HIP 22768 |
9.58 |
| 2026-03-30 12:00 |
04:53:05.96 |
+67:20:34.3 |
HIP 22768 |
9.74 |
| 2026-03-31 00:00 |
04:53:07.84 |
+67:20:18.1 |
HIP 22768 |
9.90 |
| 2026-03-31 12:00 |
04:53:09.75 |
+67:20:02.1 |
HIP 22768 |
10.07 |
| 2026-04-01 00:00 |
04:53:11.70 |
+67:19:46.1 |
HIP 22768 |
10.24 |
| 2026-04-01 12:00 |
04:53:13.67 |
+67:19:30.2 |
HIP 22768 |
10.42 |
| 2026-04-02 00:00 |
04:53:15.68 |
+67:19:14.4 |
HIP 22768 |
10.60 |
| 2026-04-02 12:00 |
04:53:17.72 |
+67:18:58.7 |
HIP 22768 |
10.79 |
| 2026-04-03 00:00 |
04:53:19.79 |
+67:18:43.0 |
HIP 22768 |
10.98 |
| 2026-04-03 12:00 |
04:53:21.90 |
+67:18:27.5 |
HIP 22768 |
11.17 |
| 2026-04-04 00:00 |
04:53:24.03 |
+67:18:12.0 |
HIP 22768 |
11.37 |
| 2026-04-04 12:00 |
04:53:26.20 |
+67:17:56.7 |
HIP 22768 |
11.57 |
| 2026-04-05 00:00 |
04:53:28.40 |
+67:17:41.4 |
HIP 22768 |
11.78 |
| 2026-04-05 12:00 |
04:53:30.62 |
+67:17:26.2 |
HIP 22768 |
11.99 |
| 2026-04-06 00:00 |
04:53:32.88 |
+67:17:11.1 |
HIP 22768 |
12.20 |
| 2026-04-06 12:00 |
04:53:35.17 |
+67:16:56.1 |
HIP 22768 |
12.42 |
| 2026-04-07 00:00 |
04:53:37.49 |
+67:16:41.3 |
HIP 22768 |
12.64 |
| 2026-04-07 12:00 |
04:53:39.85 |
+67:16:26.5 |
HIP 22768 |
12.86 |
| 2026-04-08 00:00 |
04:53:42.23 |
+67:16:11.8 |
HIP 22768 |
13.09 |
| 2026-04-08 12:00 |
04:53:44.64 |
+67:15:57.1 |
HIP 22768 |
13.32 |
| 2026-04-09 00:00 |
04:53:47.08 |
+67:15:42.6 |
HIP 22768 |
13.55 |
| 2026-04-09 12:00 |
04:53:49.55 |
+67:15:28.2 |
HIP 22768 |
13.78 |
| 2026-04-10 00:00 |
04:53:52.05 |
+67:15:13.9 |
HIP 22768 |
14.02 |
| 2026-04-10 12:00 |
04:53:54.58 |
+67:14:59.7 |
HIP 22768 |
14.26 |
| 2026-04-11 00:00 |
04:53:57.14 |
+67:14:45.6 |
HIP 22768 |
14.50 |
| 2026-04-11 12:00 |
04:53:59.72 |
+67:14:31.6 |
HIP 22768 |
14.75 |
| 2026-04-12 00:00 |
04:54:02.34 |
+67:14:17.8 |
HIP 22768 |
14.99 |
| 2026-04-12 12:00 |
04:54:04.98 |
+67:14:04.0 |
HIP 22768 |
15.24 |
| 2026-04-13 00:00 |
04:54:07.66 |
+67:13:50.3 |
HIP 22768 |
15.49 |
| 2026-04-13 12:00 |
04:54:10.36 |
+67:13:36.7 |
HIP 22768 |
15.74 |
| 2026-04-14 00:00 |
04:54:13.09 |
+67:13:23.2 |
HIP 22768 |
16.00 |
| 2026-04-14 12:00 |
04:54:15.84 |
+67:13:09.9 |
HIP 22768 |
16.25 |
| 2026-04-15 00:00 |
04:54:18.63 |
+67:12:56.6 |
HIP 22768 |
16.51 |
| 2026-04-15 12:00 |
04:54:21.44 |
+67:12:43.5 |
HIP 22768 |
16.77 |
| 2026-04-16 00:00 |
04:54:24.28 |
+67:12:30.5 |
HIP 22768 |
17.03 |