C/1983 R1 (Shoemaker)
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) |
| 2026-02-03 00:00 |
11:58:44.22 |
-21:37:02.4 |
HIP 58562 |
29.07 |
| 2026-02-03 12:00 |
11:58:42.91 |
-21:37:01.7 |
HIP 58562 |
29.33 |
| 2026-02-04 00:00 |
11:58:41.58 |
-21:37:00.9 |
HIP 58562 |
29.60 |
| 2026-02-04 12:00 |
11:58:40.24 |
-21:36:59.9 |
HIP 58562 |
29.87 |
| 2026-02-05 00:00 |
11:58:38.90 |
-21:36:58.8 |
HIP 58562 |
30.15 |
| 2026-02-05 12:00 |
11:58:37.53 |
-21:36:57.6 |
HIP 58562 |
30.43 |
| 2026-02-06 00:00 |
11:58:36.16 |
-21:36:56.2 |
HIP 58229 |
30.29 |
| 2026-02-06 12:00 |
11:58:34.78 |
-21:36:54.7 |
HIP 58229 |
29.99 |
| 2026-02-07 00:00 |
11:58:33.39 |
-21:36:53.1 |
HIP 58229 |
29.68 |
| 2026-02-07 12:00 |
11:58:31.98 |
-21:36:51.4 |
HIP 58229 |
29.37 |
| 2026-02-08 00:00 |
11:58:30.57 |
-21:36:49.5 |
HIP 58229 |
29.05 |
| 2026-02-08 12:00 |
11:58:29.14 |
-21:36:47.5 |
HIP 58229 |
28.74 |
| 2026-02-09 00:00 |
11:58:27.70 |
-21:36:45.4 |
HIP 58229 |
28.42 |
| 2026-02-09 12:00 |
11:58:26.26 |
-21:36:43.1 |
HIP 58229 |
28.09 |
| 2026-02-10 00:00 |
11:58:24.80 |
-21:36:40.7 |
HIP 58229 |
27.77 |
| 2026-02-10 12:00 |
11:58:23.33 |
-21:36:38.2 |
HIP 58229 |
27.44 |
| 2026-02-11 00:00 |
11:58:21.85 |
-21:36:35.6 |
HIP 58229 |
27.11 |
| 2026-02-11 12:00 |
11:58:20.36 |
-21:36:32.8 |
HIP 58229 |
26.78 |
| 2026-02-12 00:00 |
11:58:18.86 |
-21:36:29.9 |
HIP 58229 |
26.44 |
| 2026-02-12 12:00 |
11:58:17.36 |
-21:36:26.9 |
HIP 58229 |
26.10 |
| 2026-02-13 00:00 |
11:58:15.84 |
-21:36:23.8 |
HIP 58229 |
25.76 |
| 2026-02-13 12:00 |
11:58:14.31 |
-21:36:20.5 |
HIP 58229 |
25.42 |
| 2026-02-14 00:00 |
11:58:12.77 |
-21:36:17.1 |
HIP 58229 |
25.07 |
| 2026-02-14 12:00 |
11:58:11.23 |
-21:36:13.5 |
HIP 58229 |
24.73 |
| 2026-02-15 00:00 |
11:58:09.67 |
-21:36:09.9 |
HIP 58229 |
24.37 |
| 2026-02-15 12:00 |
11:58:08.11 |
-21:36:06.1 |
HIP 58229 |
24.02 |
| 2026-02-16 00:00 |
11:58:06.53 |
-21:36:02.2 |
HIP 58229 |
23.67 |
| 2026-02-16 12:00 |
11:58:04.95 |
-21:35:58.1 |
HIP 58229 |
23.31 |
| 2026-02-17 00:00 |
11:58:03.36 |
-21:35:54.0 |
HIP 58229 |
22.95 |
| 2026-02-17 12:00 |
11:58:01.76 |
-21:35:49.7 |
HIP 58229 |
22.59 |
| 2026-02-18 00:00 |
11:58:00.15 |
-21:35:45.3 |
HIP 58229 |
22.22 |
| 2026-02-18 12:00 |
11:57:58.54 |
-21:35:40.7 |
HIP 58229 |
21.86 |
| 2026-02-19 00:00 |
11:57:56.91 |
-21:35:36.0 |
HIP 58229 |
21.49 |
| 2026-02-19 12:00 |
11:57:55.28 |
-21:35:31.2 |
HIP 58229 |
21.12 |
| 2026-02-20 00:00 |
11:57:53.64 |
-21:35:26.3 |
HIP 58229 |
20.75 |
| 2026-02-20 12:00 |
11:57:51.99 |
-21:35:21.3 |
HIP 58229 |
20.37 |
| 2026-02-21 00:00 |
11:57:50.33 |
-21:35:16.1 |
HIP 58229 |
20.00 |
| 2026-02-21 12:00 |
11:57:48.67 |
-21:35:10.8 |
HIP 58229 |
19.62 |
| 2026-02-22 00:00 |
11:57:47.00 |
-21:35:05.4 |
HIP 58229 |
19.24 |
| 2026-02-22 12:00 |
11:57:45.32 |
-21:34:59.9 |
HIP 58229 |
18.86 |
| 2026-02-23 00:00 |
11:57:43.64 |
-21:34:54.2 |
HIP 58229 |
18.47 |
| 2026-02-23 12:00 |
11:57:41.94 |
-21:34:48.4 |
HIP 58229 |
18.09 |
| 2026-02-24 00:00 |
11:57:40.25 |
-21:34:42.5 |
HIP 58229 |
17.70 |