メタデータ
| 項目 |
値 |
| Designation |
C/1987 Q1 (Rudenko) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-10-09T12:40:34.371840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
10.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1987-09-27.0000000 |
| e |
1.00044313 |
| q (au) |
0.602602 |
| a (au) |
-1359.867867 |
| i (deg) |
114.875276 |
| Ω (om, deg) |
298.569684 |
| ω (w, deg) |
143.833532 |
| M (ma, deg) |
-0.000246 |
等級
散乱 + 全体線形
$$
M_a = (7.946 + 3.712\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.946 |
| n |
3.712 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-07-29 00:00 |
23:09:03.50 |
-52:31:05.0 |
HIP 114179 |
16.45 |
| 2026-07-29 12:00 |
23:09:01.32 |
-52:31:23.4 |
HIP 114179 |
16.04 |
| 2026-07-30 00:00 |
23:08:59.11 |
-52:31:41.6 |
HIP 114179 |
15.63 |
| 2026-07-30 12:00 |
23:08:56.89 |
-52:31:59.8 |
HIP 114179 |
15.22 |
| 2026-07-31 00:00 |
23:08:54.66 |
-52:32:17.9 |
HIP 114179 |
14.81 |
| 2026-07-31 12:00 |
23:08:52.41 |
-52:32:35.8 |
HIP 114179 |
14.40 |
| 2026-08-01 00:00 |
23:08:50.14 |
-52:32:53.7 |
HIP 114179 |
14.00 |
| 2026-08-01 12:00 |
23:08:47.86 |
-52:33:11.4 |
HIP 114179 |
13.59 |
| 2026-08-02 00:00 |
23:08:45.57 |
-52:33:29.1 |
HIP 114179 |
13.19 |
| 2026-08-02 12:00 |
23:08:43.26 |
-52:33:46.7 |
HIP 114179 |
12.79 |
| 2026-08-03 00:00 |
23:08:40.93 |
-52:34:04.1 |
HIP 114179 |
12.39 |
| 2026-08-03 12:00 |
23:08:38.60 |
-52:34:21.5 |
HIP 114179 |
11.99 |
| 2026-08-04 00:00 |
23:08:36.24 |
-52:34:38.7 |
HIP 114179 |
11.60 |
| 2026-08-04 12:00 |
23:08:33.88 |
-52:34:55.9 |
HIP 114179 |
11.20 |
| 2026-08-05 00:00 |
23:08:31.50 |
-52:35:12.9 |
HIP 114179 |
10.82 |
| 2026-08-05 12:00 |
23:08:29.10 |
-52:35:29.8 |
HIP 114179 |
10.43 |
| 2026-08-06 00:00 |
23:08:26.69 |
-52:35:46.6 |
HIP 114179 |
10.05 |
| 2026-08-06 12:00 |
23:08:24.27 |
-52:36:03.3 |
HIP 114179 |
9.68 |
| 2026-08-07 00:00 |
23:08:21.84 |
-52:36:19.9 |
HIP 114179 |
9.31 |
| 2026-08-07 12:00 |
23:08:19.39 |
-52:36:36.4 |
HIP 114179 |
8.95 |
| 2026-08-08 00:00 |
23:08:16.93 |
-52:36:52.7 |
HIP 114179 |
8.59 |
| 2026-08-08 12:00 |
23:08:14.46 |
-52:37:09.0 |
HIP 114179 |
8.24 |
| 2026-08-09 00:00 |
23:08:11.97 |
-52:37:25.1 |
HIP 114179 |
7.91 |
| 2026-08-09 12:00 |
23:08:09.47 |
-52:37:41.1 |
HIP 114179 |
7.58 |
| 2026-08-10 00:00 |
23:08:06.96 |
-52:37:56.9 |
HIP 114179 |
7.27 |
| 2026-08-10 12:00 |
23:08:04.44 |
-52:38:12.7 |
HIP 114179 |
6.97 |
| 2026-08-11 00:00 |
23:08:01.91 |
-52:38:28.3 |
HIP 114179 |
6.69 |
| 2026-08-11 12:00 |
23:07:59.36 |
-52:38:43.8 |
HIP 114179 |
6.43 |
| 2026-08-12 00:00 |
23:07:56.80 |
-52:38:59.2 |
HIP 114179 |
6.19 |
| 2026-08-12 12:00 |
23:07:54.23 |
-52:39:14.4 |
HIP 114179 |
5.97 |
| 2026-08-13 00:00 |
23:07:51.65 |
-52:39:29.5 |
HIP 114179 |
5.78 |
| 2026-08-13 12:00 |
23:07:49.06 |
-52:39:44.5 |
HIP 114179 |
5.62 |
| 2026-08-14 00:00 |
23:07:46.46 |
-52:39:59.3 |
HIP 114179 |
5.49 |
| 2026-08-14 12:00 |
23:07:43.85 |
-52:40:14.0 |
HIP 114179 |
5.39 |
| 2026-08-15 00:00 |
23:07:41.23 |
-52:40:28.6 |
HIP 114179 |
5.34 |
| 2026-08-15 12:00 |
23:07:38.60 |
-52:40:43.0 |
HIP 114179 |
5.32 |
| 2026-08-16 00:00 |
23:07:35.96 |
-52:40:57.3 |
HIP 114179 |
5.34 |
| 2026-08-16 12:00 |
23:07:33.30 |
-52:41:11.4 |
HIP 114179 |
5.39 |
| 2026-08-17 00:00 |
23:07:30.64 |
-52:41:25.4 |
HIP 114179 |
5.48 |
| 2026-08-17 12:00 |
23:07:27.97 |
-52:41:39.3 |
HIP 114179 |
5.61 |
| 2026-08-18 00:00 |
23:07:25.29 |
-52:41:53.0 |
HIP 114179 |
5.77 |
| 2026-08-18 12:00 |
23:07:22.61 |
-52:42:06.6 |
HIP 114179 |
5.96 |
| 2026-08-19 00:00 |
23:07:19.91 |
-52:42:20.0 |
HIP 114138 |
5.69 |