メタデータ
| 項目 |
値 |
| Designation |
C/1983 H1 (IRAS-Araki-Alcock) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1983-05-21T06:06:31.124160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
347 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1983-05-13.0000000 |
| e |
0.98988782 |
| q (au) |
0.991341 |
| a (au) |
98.034357 |
| i (deg) |
73.251379 |
| Ω (om, deg) |
49.102458 |
| ω (w, deg) |
192.850689 |
| M (ma, deg) |
359.991618 |
等級
散乱 + 全体線形
$$
M_a = (9.784 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.784 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.513 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
03:08:11.21 |
+18:37:30.3 |
HIP 14586 |
10.47 |
| 2026-06-01 12:00 |
03:08:12.95 |
+18:37:38.0 |
HIP 14586 |
10.25 |
| 2026-06-02 00:00 |
03:08:14.69 |
+18:37:45.8 |
HIP 14586 |
10.06 |
| 2026-06-02 12:00 |
03:08:16.42 |
+18:37:53.5 |
HIP 14586 |
9.88 |
| 2026-06-03 00:00 |
03:08:18.15 |
+18:38:01.2 |
HIP 14586 |
9.71 |
| 2026-06-03 12:00 |
03:08:19.87 |
+18:38:08.9 |
HIP 14586 |
9.56 |
| 2026-06-04 00:00 |
03:08:21.58 |
+18:38:16.6 |
HIP 14586 |
9.43 |
| 2026-06-04 12:00 |
03:08:23.29 |
+18:38:24.2 |
HIP 14586 |
9.32 |
| 2026-06-05 00:00 |
03:08:24.99 |
+18:38:31.8 |
HIP 14586 |
9.22 |
| 2026-06-05 12:00 |
03:08:26.69 |
+18:38:39.4 |
HIP 14586 |
9.14 |
| 2026-06-06 00:00 |
03:08:28.38 |
+18:38:47.0 |
HIP 14586 |
9.09 |
| 2026-06-06 12:00 |
03:08:30.06 |
+18:38:54.6 |
HIP 14586 |
9.05 |
| 2026-06-07 00:00 |
03:08:31.74 |
+18:39:02.1 |
HIP 14586 |
9.03 |
| 2026-06-07 12:00 |
03:08:33.41 |
+18:39:09.6 |
HIP 14586 |
9.03 |
| 2026-06-08 00:00 |
03:08:35.07 |
+18:39:17.1 |
HIP 14586 |
9.05 |
| 2026-06-08 12:00 |
03:08:36.72 |
+18:39:24.5 |
HIP 14586 |
9.09 |
| 2026-06-09 00:00 |
03:08:38.37 |
+18:39:32.0 |
HIP 14586 |
9.14 |
| 2026-06-09 12:00 |
03:08:40.01 |
+18:39:39.4 |
HIP 14586 |
9.21 |
| 2026-06-10 00:00 |
03:08:41.65 |
+18:39:46.8 |
HIP 14586 |
9.30 |
| 2026-06-10 12:00 |
03:08:43.27 |
+18:39:54.1 |
HIP 14586 |
9.41 |
| 2026-06-11 00:00 |
03:08:44.89 |
+18:40:01.4 |
HIP 14586 |
9.53 |
| 2026-06-11 12:00 |
03:08:46.51 |
+18:40:08.7 |
HIP 14586 |
9.66 |
| 2026-06-12 00:00 |
03:08:48.11 |
+18:40:16.0 |
HIP 14586 |
9.81 |
| 2026-06-12 12:00 |
03:08:49.70 |
+18:40:23.2 |
HIP 14586 |
9.97 |
| 2026-06-13 00:00 |
03:08:51.29 |
+18:40:30.4 |
HIP 14586 |
10.15 |
| 2026-06-13 12:00 |
03:08:52.87 |
+18:40:37.6 |
HIP 14586 |
10.33 |
| 2026-06-14 00:00 |
03:08:54.44 |
+18:40:44.8 |
HIP 14586 |
10.53 |
| 2026-06-14 12:00 |
03:08:56.01 |
+18:40:51.9 |
HIP 14586 |
10.73 |
| 2026-06-15 00:00 |
03:08:57.56 |
+18:40:59.0 |
HIP 14586 |
10.94 |
| 2026-06-15 12:00 |
03:08:59.10 |
+18:41:06.0 |
HIP 14586 |
11.16 |
| 2026-06-16 00:00 |
03:09:00.64 |
+18:41:13.0 |
HIP 14586 |
11.39 |
| 2026-06-16 12:00 |
03:09:02.17 |
+18:41:20.0 |
HIP 14586 |
11.63 |
| 2026-06-17 00:00 |
03:09:03.69 |
+18:41:27.0 |
HIP 14586 |
11.87 |
| 2026-06-17 12:00 |
03:09:05.20 |
+18:41:33.9 |
HIP 14586 |
12.11 |
| 2026-06-18 00:00 |
03:09:06.70 |
+18:41:40.8 |
HIP 14586 |
12.37 |
| 2026-06-18 12:00 |
03:09:08.19 |
+18:41:47.6 |
HIP 14586 |
12.62 |
| 2026-06-19 00:00 |
03:09:09.67 |
+18:41:54.5 |
HIP 14586 |
12.88 |
| 2026-06-19 12:00 |
03:09:11.14 |
+18:42:01.2 |
HIP 14586 |
13.14 |
| 2026-06-20 00:00 |
03:09:12.61 |
+18:42:08.0 |
HIP 14586 |
13.41 |
| 2026-06-20 12:00 |
03:09:14.06 |
+18:42:14.7 |
HIP 14586 |
13.68 |
| 2026-06-21 00:00 |
03:09:15.50 |
+18:42:21.4 |
HIP 14586 |
13.95 |
| 2026-06-21 12:00 |
03:09:16.94 |
+18:42:28.0 |
HIP 14586 |
14.22 |
| 2026-06-22 00:00 |
03:09:18.36 |
+18:42:34.6 |
HIP 14586 |
14.50 |