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) |
| 2026-09-20 00:00 |
23:38:46.48 |
+06:41:08.8 |
HIP 116731 |
25.20 |
| 2026-09-20 12:00 |
23:38:31.34 |
+06:39:17.7 |
HIP 116731 |
28.42 |
| 2026-09-21 00:00 |
23:38:16.20 |
+06:37:25.9 |
HIP 116511 |
24.99 |
| 2026-09-21 12:00 |
23:38:01.06 |
+06:35:33.5 |
HIP 116511 |
21.15 |
| 2026-09-22 00:00 |
23:37:45.92 |
+06:33:40.5 |
HIP 116511 |
17.49 |
| 2026-09-22 12:00 |
23:37:30.79 |
+06:31:46.9 |
HIP 116511 |
14.13 |
| 2026-09-23 00:00 |
23:37:15.66 |
+06:29:52.8 |
HIP 116511 |
11.36 |
| 2026-09-23 12:00 |
23:37:00.55 |
+06:27:58.1 |
HIP 116511 |
9.70 |
| 2026-09-24 00:00 |
23:36:45.46 |
+06:26:02.8 |
HIP 116511 |
9.74 |
| 2026-09-24 12:00 |
23:36:30.38 |
+06:24:07.1 |
HIP 116511 |
11.46 |
| 2026-09-25 00:00 |
23:36:15.33 |
+06:22:10.9 |
HIP 116511 |
14.26 |
| 2026-09-25 12:00 |
23:36:00.29 |
+06:20:14.1 |
HIP 116511 |
17.63 |
| 2026-09-26 00:00 |
23:35:45.29 |
+06:18:17.0 |
HIP 116511 |
21.31 |
| 2026-09-26 12:00 |
23:35:30.31 |
+06:16:19.3 |
HIP 116511 |
25.16 |
| 2026-09-27 00:00 |
23:35:15.36 |
+06:14:21.3 |
HIP 116511 |
29.10 |
| 2026-09-27 12:00 |
23:35:00.44 |
+06:12:22.9 |
HIP 116521 |
32.00 |
| 2026-09-28 00:00 |
23:34:45.56 |
+06:10:24.0 |
HIP 116521 |
34.23 |
| 2026-09-28 12:00 |
23:34:30.73 |
+06:08:24.8 |
HIP 116521 |
36.79 |
| 2026-09-29 00:00 |
23:34:15.93 |
+06:06:25.3 |
HIP 116338 |
38.26 |
| 2026-09-29 12:00 |
23:34:01.17 |
+06:04:25.4 |
HIP 116338 |
36.68 |
| 2026-09-30 00:00 |
23:33:46.47 |
+06:02:25.2 |
HIP 116338 |
35.51 |
| 2026-09-30 12:00 |
23:33:31.81 |
+06:00:24.7 |
HIP 116338 |
34.80 |
| 2026-10-01 00:00 |
23:33:17.20 |
+05:58:23.9 |
HIP 116338 |
34.57 |
| 2026-10-01 12:00 |
23:33:02.65 |
+05:56:22.9 |
HIP 116338 |
34.83 |
| 2026-10-02 00:00 |
23:32:48.16 |
+05:54:21.7 |
HIP 116273 |
34.66 |
| 2026-10-02 12:00 |
23:32:33.73 |
+05:52:20.2 |
HIP 116273 |
34.08 |
| 2026-10-03 00:00 |
23:32:19.36 |
+05:50:18.5 |
HIP 116273 |
33.98 |
| 2026-10-03 12:00 |
23:32:05.05 |
+05:48:16.7 |
HIP 116273 |
34.37 |
| 2026-10-04 00:00 |
23:31:50.81 |
+05:46:14.7 |
HIP 116273 |
35.21 |
| 2026-10-04 12:00 |
23:31:36.65 |
+05:44:12.6 |
HIP 116035 |
32.38 |
| 2026-10-05 00:00 |
23:31:22.55 |
+05:42:10.3 |
HIP 116035 |
29.12 |
| 2026-10-05 12:00 |
23:31:08.54 |
+05:40:08.0 |
HIP 116035 |
26.10 |
| 2026-10-06 00:00 |
23:30:54.60 |
+05:38:05.6 |
HIP 116035 |
23.38 |
| 2026-10-06 12:00 |
23:30:40.75 |
+05:36:03.1 |
HIP 116035 |
21.09 |
| 2026-10-07 00:00 |
23:30:26.98 |
+05:34:00.6 |
HIP 116035 |
19.35 |
| 2026-10-07 12:00 |
23:30:13.29 |
+05:31:58.1 |
HIP 116035 |
18.33 |
| 2026-10-08 00:00 |
23:29:59.70 |
+05:29:55.7 |
HIP 116035 |
18.12 |
| 2026-10-08 12:00 |
23:29:46.20 |
+05:27:53.2 |
HIP 116035 |
18.75 |
| 2026-10-09 00:00 |
23:29:32.80 |
+05:25:50.8 |
HIP 116035 |
20.12 |
| 2026-10-09 12:00 |
23:29:19.49 |
+05:23:48.5 |
HIP 116035 |
22.08 |
| 2026-10-10 00:00 |
23:29:06.28 |
+05:21:46.3 |
HIP 116035 |
24.49 |
| 2026-10-10 12:00 |
23:28:53.18 |
+05:19:44.2 |
HIP 116035 |
27.20 |
| 2026-10-11 00:00 |
23:28:40.18 |
+05:17:42.3 |
HIP 116004 |
28.75 |