メタデータ
| 項目 |
値 |
| Designation |
P/2010 UH55 (Spacewatch) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-05-10T08:39:59.212800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:46Z |
| Obs used |
164 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
18.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-04-26.0000000 |
| e |
0.57513428 |
| q (au) |
2.767968 |
| a (au) |
6.514923 |
| i (deg) |
8.662558 |
| Ω (om, deg) |
235.264395 |
| ω (w, deg) |
221.618059 |
| M (ma, deg) |
359.148807 |
等級
散乱 + 全体線形
$$
M_a = (14.633 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.633 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.563 |
| 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) |
| 2026-06-01 00:00 |
23:46:22.02 |
+06:02:22.0 |
HIP 117179 |
19.42 |
| 2026-06-01 12:00 |
23:46:35.44 |
+06:04:15.4 |
HIP 117179 |
23.15 |
| 2026-06-02 00:00 |
23:46:48.75 |
+06:06:08.2 |
HIP 117179 |
26.89 |
| 2026-06-02 12:00 |
23:47:01.95 |
+06:08:00.6 |
HIP 117179 |
30.62 |
| 2026-06-03 00:00 |
23:47:15.05 |
+06:09:52.3 |
HIP 117467 |
30.40 |
| 2026-06-03 12:00 |
23:47:28.05 |
+06:11:43.6 |
HIP 117467 |
26.68 |
| 2026-06-04 00:00 |
23:47:40.93 |
+06:13:34.3 |
HIP 117467 |
23.00 |
| 2026-06-04 12:00 |
23:47:53.71 |
+06:15:24.5 |
HIP 117467 |
19.36 |
| 2026-06-05 00:00 |
23:48:06.37 |
+06:17:14.1 |
HIP 117467 |
15.76 |
| 2026-06-05 12:00 |
23:48:18.93 |
+06:19:03.2 |
HIP 117467 |
12.20 |
| 2026-06-06 00:00 |
23:48:31.38 |
+06:20:51.6 |
HIP 117467 |
8.72 |
| 2026-06-06 12:00 |
23:48:43.71 |
+06:22:39.6 |
HIP 117467 |
5.41 |
| 2026-06-07 00:00 |
23:48:55.93 |
+06:24:26.9 |
HIP 117459 |
2.52 |
| 2026-06-07 12:00 |
23:49:08.04 |
+06:26:13.7 |
HIP 117459 |
2.48 |
| 2026-06-08 00:00 |
23:49:20.04 |
+06:27:59.8 |
HIP 117459 |
5.48 |
| 2026-06-08 12:00 |
23:49:31.92 |
+06:29:45.4 |
HIP 117459 |
8.80 |
| 2026-06-09 00:00 |
23:49:43.68 |
+06:31:30.4 |
HIP 117459 |
12.15 |
| 2026-06-09 12:00 |
23:49:55.33 |
+06:33:14.7 |
HIP 117459 |
15.50 |
| 2026-06-10 00:00 |
23:50:06.86 |
+06:34:58.5 |
HIP 117459 |
18.82 |
| 2026-06-10 12:00 |
23:50:18.27 |
+06:36:41.6 |
HIP 117459 |
22.12 |
| 2026-06-11 00:00 |
23:50:29.56 |
+06:38:24.1 |
HIP 117459 |
25.39 |
| 2026-06-11 12:00 |
23:50:40.74 |
+06:40:05.9 |
HIP 117459 |
28.64 |
| 2026-06-12 00:00 |
23:50:51.79 |
+06:41:47.1 |
HIP 117459 |
31.85 |
| 2026-06-12 12:00 |
23:51:02.72 |
+06:43:27.6 |
HIP 117781 |
31.18 |
| 2026-06-13 00:00 |
23:51:13.53 |
+06:45:07.5 |
HIP 117781 |
28.64 |
| 2026-06-13 12:00 |
23:51:24.21 |
+06:46:46.7 |
HIP 117781 |
26.26 |
| 2026-06-14 00:00 |
23:51:34.77 |
+06:48:25.3 |
HIP 117781 |
24.07 |
| 2026-06-14 12:00 |
23:51:45.20 |
+06:50:03.2 |
HIP 117781 |
22.13 |
| 2026-06-15 00:00 |
23:51:55.51 |
+06:51:40.3 |
HIP 117781 |
20.49 |
| 2026-06-15 12:00 |
23:52:05.69 |
+06:53:16.8 |
HIP 117781 |
19.21 |
| 2026-06-16 00:00 |
23:52:15.75 |
+06:54:52.6 |
HIP 117781 |
18.35 |
| 2026-06-16 12:00 |
23:52:25.67 |
+06:56:27.7 |
HIP 117781 |
17.95 |
| 2026-06-17 00:00 |
23:52:35.47 |
+06:58:02.0 |
HIP 117781 |
18.02 |
| 2026-06-17 12:00 |
23:52:45.14 |
+06:59:35.7 |
HIP 117781 |
18.56 |
| 2026-06-18 00:00 |
23:52:54.67 |
+07:01:08.6 |
HIP 117781 |
19.49 |
| 2026-06-18 12:00 |
23:53:04.08 |
+07:02:40.8 |
HIP 117781 |
20.76 |
| 2026-06-19 00:00 |
23:53:13.36 |
+07:04:12.2 |
HIP 117781 |
22.30 |
| 2026-06-19 12:00 |
23:53:22.50 |
+07:05:42.9 |
HIP 117781 |
24.04 |
| 2026-06-20 00:00 |
23:53:31.51 |
+07:07:12.9 |
HIP 117927 |
24.07 |
| 2026-06-20 12:00 |
23:53:40.38 |
+07:08:42.1 |
HIP 117927 |
22.13 |
| 2026-06-21 00:00 |
23:53:49.12 |
+07:10:10.5 |
HIP 117927 |
20.39 |
| 2026-06-21 12:00 |
23:53:57.73 |
+07:11:38.2 |
HIP 117927 |
18.88 |
| 2026-06-22 00:00 |
23:54:06.20 |
+07:13:05.1 |
HIP 117927 |
17.64 |