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) |
| 2026-06-01 00:00 |
05:00:08.06 |
+67:01:36.3 |
HIP 23484 |
20.03 |
| 2026-06-01 12:00 |
05:00:12.33 |
+67:01:35.6 |
HIP 23484 |
19.69 |
| 2026-06-02 00:00 |
05:00:16.59 |
+67:01:34.9 |
HIP 23484 |
19.36 |
| 2026-06-02 12:00 |
05:00:20.86 |
+67:01:34.5 |
HIP 23484 |
19.03 |
| 2026-06-03 00:00 |
05:00:25.13 |
+67:01:34.2 |
HIP 23484 |
18.70 |
| 2026-06-03 12:00 |
05:00:29.41 |
+67:01:34.0 |
HIP 23484 |
18.39 |
| 2026-06-04 00:00 |
05:00:33.68 |
+67:01:33.9 |
HIP 23484 |
18.07 |
| 2026-06-04 12:00 |
05:00:37.96 |
+67:01:34.0 |
HIP 23484 |
17.77 |
| 2026-06-05 00:00 |
05:00:42.24 |
+67:01:34.2 |
HIP 23484 |
17.46 |
| 2026-06-05 12:00 |
05:00:46.52 |
+67:01:34.6 |
HIP 23484 |
17.17 |
| 2026-06-06 00:00 |
05:00:50.80 |
+67:01:35.1 |
HIP 23484 |
16.88 |
| 2026-06-06 12:00 |
05:00:55.09 |
+67:01:35.8 |
HIP 23484 |
16.60 |
| 2026-06-07 00:00 |
05:00:59.37 |
+67:01:36.6 |
HIP 23484 |
16.33 |
| 2026-06-07 12:00 |
05:01:03.65 |
+67:01:37.5 |
HIP 23484 |
16.06 |
| 2026-06-08 00:00 |
05:01:07.94 |
+67:01:38.6 |
HIP 23484 |
15.81 |
| 2026-06-08 12:00 |
05:01:12.22 |
+67:01:39.8 |
HIP 23521 |
15.54 |
| 2026-06-09 00:00 |
05:01:16.51 |
+67:01:41.1 |
HIP 23521 |
15.19 |
| 2026-06-09 12:00 |
05:01:20.79 |
+67:01:42.6 |
HIP 23521 |
14.83 |
| 2026-06-10 00:00 |
05:01:25.07 |
+67:01:44.2 |
HIP 23521 |
14.48 |
| 2026-06-10 12:00 |
05:01:29.35 |
+67:01:46.0 |
HIP 23521 |
14.13 |
| 2026-06-11 00:00 |
05:01:33.63 |
+67:01:47.9 |
HIP 23521 |
13.79 |
| 2026-06-11 12:00 |
05:01:37.91 |
+67:01:49.9 |
HIP 23521 |
13.44 |
| 2026-06-12 00:00 |
05:01:42.18 |
+67:01:52.1 |
HIP 23521 |
13.10 |
| 2026-06-12 12:00 |
05:01:46.45 |
+67:01:54.4 |
HIP 23521 |
12.77 |
| 2026-06-13 00:00 |
05:01:50.72 |
+67:01:56.9 |
HIP 23521 |
12.43 |
| 2026-06-13 12:00 |
05:01:54.99 |
+67:01:59.5 |
HIP 23521 |
12.10 |
| 2026-06-14 00:00 |
05:01:59.25 |
+67:02:02.2 |
HIP 23521 |
11.78 |
| 2026-06-14 12:00 |
05:02:03.51 |
+67:02:05.1 |
HIP 23521 |
11.46 |
| 2026-06-15 00:00 |
05:02:07.77 |
+67:02:08.1 |
HIP 23521 |
11.14 |
| 2026-06-15 12:00 |
05:02:12.02 |
+67:02:11.2 |
HIP 23521 |
10.83 |
| 2026-06-16 00:00 |
05:02:16.27 |
+67:02:14.5 |
HIP 23521 |
10.52 |
| 2026-06-16 12:00 |
05:02:20.51 |
+67:02:17.9 |
HIP 23521 |
10.22 |
| 2026-06-17 00:00 |
05:02:24.75 |
+67:02:21.5 |
HIP 23521 |
9.93 |
| 2026-06-17 12:00 |
05:02:28.98 |
+67:02:25.2 |
HIP 23521 |
9.65 |
| 2026-06-18 00:00 |
05:02:33.21 |
+67:02:29.0 |
HIP 23521 |
9.37 |
| 2026-06-18 12:00 |
05:02:37.43 |
+67:02:33.0 |
HIP 23521 |
9.10 |
| 2026-06-19 00:00 |
05:02:41.64 |
+67:02:37.1 |
HIP 23521 |
8.84 |
| 2026-06-19 12:00 |
05:02:45.85 |
+67:02:41.3 |
HIP 23521 |
8.60 |
| 2026-06-20 00:00 |
05:02:50.05 |
+67:02:45.7 |
HIP 23521 |
8.36 |
| 2026-06-20 12:00 |
05:02:54.25 |
+67:02:50.1 |
HIP 23521 |
8.14 |
| 2026-06-21 00:00 |
05:02:58.44 |
+67:02:54.8 |
HIP 23521 |
7.93 |
| 2026-06-21 12:00 |
05:03:02.62 |
+67:02:59.5 |
HIP 23521 |
7.74 |
| 2026-06-22 00:00 |
05:03:06.79 |
+67:03:04.4 |
HIP 23521 |
7.56 |