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) |
| 2026-05-12 00:00 |
04:57:23.05 |
+67:04:01.2 |
HIP 23124 |
22.26 |
| 2026-05-12 12:00 |
04:57:26.98 |
+67:03:54.8 |
HIP 23124 |
22.25 |
| 2026-05-13 00:00 |
04:57:30.91 |
+67:03:48.6 |
HIP 23124 |
22.24 |
| 2026-05-13 12:00 |
04:57:34.86 |
+67:03:42.6 |
HIP 23124 |
22.24 |
| 2026-05-14 00:00 |
04:57:38.83 |
+67:03:36.6 |
HIP 23124 |
22.24 |
| 2026-05-14 12:00 |
04:57:42.80 |
+67:03:30.8 |
HIP 23124 |
22.25 |
| 2026-05-15 00:00 |
04:57:46.79 |
+67:03:25.2 |
HIP 23124 |
22.26 |
| 2026-05-15 12:00 |
04:57:50.80 |
+67:03:19.7 |
HIP 23124 |
22.28 |
| 2026-05-16 00:00 |
04:57:54.81 |
+67:03:14.3 |
HIP 23124 |
22.30 |
| 2026-05-16 12:00 |
04:57:58.84 |
+67:03:09.1 |
HIP 23124 |
22.32 |
| 2026-05-17 00:00 |
04:58:02.88 |
+67:03:04.0 |
HIP 23124 |
22.35 |
| 2026-05-17 12:00 |
04:58:06.92 |
+67:02:59.0 |
HIP 23124 |
22.39 |
| 2026-05-18 00:00 |
04:58:10.99 |
+67:02:54.2 |
HIP 23124 |
22.42 |
| 2026-05-18 12:00 |
04:58:15.06 |
+67:02:49.5 |
HIP 23124 |
22.47 |
| 2026-05-19 00:00 |
04:58:19.14 |
+67:02:45.0 |
HIP 23124 |
22.52 |
| 2026-05-19 12:00 |
04:58:23.23 |
+67:02:40.6 |
HIP 23124 |
22.57 |
| 2026-05-20 00:00 |
04:58:27.33 |
+67:02:36.3 |
HIP 23124 |
22.63 |
| 2026-05-20 12:00 |
04:58:31.45 |
+67:02:32.2 |
HIP 23124 |
22.69 |
| 2026-05-21 00:00 |
04:58:35.57 |
+67:02:28.2 |
HIP 23124 |
22.76 |
| 2026-05-21 12:00 |
04:58:39.70 |
+67:02:24.4 |
HIP 23124 |
22.83 |
| 2026-05-22 00:00 |
04:58:43.84 |
+67:02:20.7 |
HIP 23124 |
22.90 |
| 2026-05-22 12:00 |
04:58:47.99 |
+67:02:17.1 |
HIP 23124 |
22.98 |
| 2026-05-23 00:00 |
04:58:52.14 |
+67:02:13.7 |
HIP 23124 |
23.07 |
| 2026-05-23 12:00 |
04:58:56.31 |
+67:02:10.4 |
HIP 23124 |
23.16 |
| 2026-05-24 00:00 |
04:59:00.48 |
+67:02:07.3 |
HIP 23124 |
23.25 |
| 2026-05-24 12:00 |
04:59:04.66 |
+67:02:04.3 |
HIP 23124 |
23.35 |
| 2026-05-25 00:00 |
04:59:08.84 |
+67:02:01.5 |
HIP 23124 |
23.46 |
| 2026-05-25 12:00 |
04:59:13.04 |
+67:01:58.8 |
HIP 23124 |
23.56 |
| 2026-05-26 00:00 |
04:59:17.24 |
+67:01:56.2 |
HIP 23124 |
23.67 |
| 2026-05-26 12:00 |
04:59:21.44 |
+67:01:53.8 |
HIP 23124 |
23.79 |
| 2026-05-27 00:00 |
04:59:25.66 |
+67:01:51.5 |
HIP 23484 |
23.59 |
| 2026-05-27 12:00 |
04:59:29.87 |
+67:01:49.3 |
HIP 23484 |
23.22 |
| 2026-05-28 00:00 |
04:59:34.10 |
+67:01:47.3 |
HIP 23484 |
22.86 |
| 2026-05-28 12:00 |
04:59:38.33 |
+67:01:45.4 |
HIP 23484 |
22.49 |
| 2026-05-29 00:00 |
04:59:42.56 |
+67:01:43.7 |
HIP 23484 |
22.13 |
| 2026-05-29 12:00 |
04:59:46.80 |
+67:01:42.1 |
HIP 23484 |
21.77 |
| 2026-05-30 00:00 |
04:59:51.05 |
+67:01:40.7 |
HIP 23484 |
21.42 |
| 2026-05-30 12:00 |
04:59:55.29 |
+67:01:39.4 |
HIP 23484 |
21.06 |
| 2026-05-31 00:00 |
04:59:59.55 |
+67:01:38.2 |
HIP 23484 |
20.71 |
| 2026-05-31 12:00 |
05:00:03.80 |
+67:01:37.2 |
HIP 23484 |
20.37 |
| 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 |