メタデータ
| 項目 |
値 |
| Designation |
C/1983 R1 (Shoemaker) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1983-11-23T19:05:28.720320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
117 |
| NEO |
- |
| M1 |
5.800 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1983-12-05.0000000 |
| e |
1.00019923 |
| q (au) |
3.344912 |
| a (au) |
-16789.101324 |
| i (deg) |
137.597258 |
| Ω (om, deg) |
164.683890 |
| ω (w, deg) |
176.039037 |
| M (ma, deg) |
0.000005 |
等級
散乱 + 全体線形
$$
M_a = (4.970 + 5.968\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.970 |
| n |
5.968 |
| gf |
1.000 |
| gb |
-0.719 |
| k |
0.800 |
| 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 |
11:55:53.10 |
-20:42:31.6 |
HIP 57986 |
38.12 |
| 2026-09-20 12:00 |
11:55:54.81 |
-20:42:40.4 |
HIP 57986 |
38.53 |
| 2026-09-21 00:00 |
11:55:56.51 |
-20:42:49.2 |
HIP 57986 |
38.94 |
| 2026-09-21 12:00 |
11:55:58.21 |
-20:42:58.2 |
HIP 57986 |
39.36 |
| 2026-09-22 00:00 |
11:55:59.92 |
-20:43:07.2 |
HIP 57986 |
39.77 |
| 2026-09-22 12:00 |
11:56:01.62 |
-20:43:16.3 |
HIP 57986 |
40.19 |
| 2026-09-23 00:00 |
11:56:03.33 |
-20:43:25.4 |
HIP 57986 |
40.61 |
| 2026-09-23 12:00 |
11:56:05.03 |
-20:43:34.7 |
HIP 57986 |
41.02 |
| 2026-09-24 00:00 |
11:56:06.73 |
-20:43:44.0 |
HIP 57986 |
41.44 |
| 2026-09-24 12:00 |
11:56:08.44 |
-20:43:53.4 |
HIP 58229 |
41.77 |
| 2026-09-25 00:00 |
11:56:10.14 |
-20:44:02.9 |
HIP 58229 |
41.55 |
| 2026-09-25 12:00 |
11:56:11.84 |
-20:44:12.5 |
HIP 58229 |
41.34 |
| 2026-09-26 00:00 |
11:56:13.54 |
-20:44:22.1 |
HIP 58229 |
41.13 |
| 2026-09-26 12:00 |
11:56:15.24 |
-20:44:31.8 |
HIP 58229 |
40.92 |
| 2026-09-27 00:00 |
11:56:16.94 |
-20:44:41.6 |
HIP 58229 |
40.71 |
| 2026-09-27 12:00 |
11:56:18.64 |
-20:44:51.4 |
HIP 58229 |
40.51 |
| 2026-09-28 00:00 |
11:56:20.33 |
-20:45:01.4 |
HIP 58229 |
40.30 |
| 2026-09-28 12:00 |
11:56:22.03 |
-20:45:11.4 |
HIP 58229 |
40.10 |
| 2026-09-29 00:00 |
11:56:23.72 |
-20:45:21.4 |
HIP 58229 |
39.90 |
| 2026-09-29 12:00 |
11:56:25.41 |
-20:45:31.6 |
HIP 58229 |
39.71 |
| 2026-09-30 00:00 |
11:56:27.10 |
-20:45:41.8 |
HIP 58229 |
39.52 |
| 2026-09-30 12:00 |
11:56:28.79 |
-20:45:52.1 |
HIP 58229 |
39.33 |
| 2026-10-01 00:00 |
11:56:30.47 |
-20:46:02.4 |
HIP 58229 |
39.14 |
| 2026-10-01 12:00 |
11:56:32.16 |
-20:46:12.8 |
HIP 58229 |
38.95 |
| 2026-10-02 00:00 |
11:56:33.84 |
-20:46:23.3 |
HIP 58229 |
38.77 |
| 2026-10-02 12:00 |
11:56:35.52 |
-20:46:33.9 |
HIP 58229 |
38.59 |
| 2026-10-03 00:00 |
11:56:37.19 |
-20:46:44.5 |
HIP 58229 |
38.41 |
| 2026-10-03 12:00 |
11:56:38.87 |
-20:46:55.2 |
HIP 58229 |
38.24 |
| 2026-10-04 00:00 |
11:56:40.54 |
-20:47:05.9 |
HIP 58229 |
38.07 |
| 2026-10-04 12:00 |
11:56:42.21 |
-20:47:16.7 |
HIP 58229 |
37.90 |
| 2026-10-05 00:00 |
11:56:43.87 |
-20:47:27.6 |
HIP 58229 |
37.74 |
| 2026-10-05 12:00 |
11:56:45.54 |
-20:47:38.5 |
HIP 58229 |
37.58 |
| 2026-10-06 00:00 |
11:56:47.19 |
-20:47:49.5 |
HIP 58229 |
37.42 |
| 2026-10-06 12:00 |
11:56:48.85 |
-20:48:00.6 |
HIP 58229 |
37.26 |
| 2026-10-07 00:00 |
11:56:50.50 |
-20:48:11.7 |
HIP 58229 |
37.11 |
| 2026-10-07 12:00 |
11:56:52.15 |
-20:48:22.9 |
HIP 58229 |
36.96 |
| 2026-10-08 00:00 |
11:56:53.80 |
-20:48:34.1 |
HIP 58229 |
36.82 |
| 2026-10-08 12:00 |
11:56:55.44 |
-20:48:45.4 |
HIP 58229 |
36.67 |
| 2026-10-09 00:00 |
11:56:57.07 |
-20:48:56.8 |
HIP 58229 |
36.54 |
| 2026-10-09 12:00 |
11:56:58.71 |
-20:49:08.2 |
HIP 58229 |
36.40 |
| 2026-10-10 00:00 |
11:57:00.34 |
-20:49:19.6 |
HIP 58229 |
36.27 |
| 2026-10-10 12:00 |
11:57:01.96 |
-20:49:31.1 |
HIP 58229 |
36.14 |
| 2026-10-11 00:00 |
11:57:03.58 |
-20:49:42.7 |
HIP 58229 |
36.02 |