メタデータ
| 項目 |
値 |
| Designation |
82P/Gehrels 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2001-08-30T06:54:50.483520Z |
| Orbit solution date (soln_date, UTC) |
2021-03-19T14:50:48Z |
| Obs used |
143 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
18.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-07-29.0000000 |
| e |
0.12325421 |
| q (au) |
3.625705 |
| a (au) |
4.135412 |
| i (deg) |
1.126555 |
| Ω (om, deg) |
239.591461 |
| ω (w, deg) |
227.495662 |
| M (ma, deg) |
38.993681 |
等級
散乱 + 全体線形
$$
M_a = (15.339 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.339 |
| n |
2.000 |
| gf |
0.923 |
| gb |
-0.934 |
| k |
1.000 |
| δ90 |
7.611 |
| 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 |
06:29:34.78 |
+22:48:34.0 |
HIP 30958 |
4.75 |
| 2026-07-29 12:00 |
06:30:14.95 |
+22:48:00.2 |
HIP 30958 |
5.03 |
| 2026-07-30 00:00 |
06:30:55.07 |
+22:47:25.8 |
HIP 30958 |
14.13 |
| 2026-07-30 12:00 |
06:31:35.14 |
+22:46:50.8 |
HIP 31000 |
22.04 |
| 2026-07-31 00:00 |
06:32:15.15 |
+22:46:15.2 |
HIP 31000 |
29.44 |
| 2026-07-31 12:00 |
06:32:55.11 |
+22:45:38.9 |
HIP 31313 |
23.10 |
| 2026-08-01 00:00 |
06:33:35.01 |
+22:45:02.0 |
HIP 31313 |
18.93 |
| 2026-08-01 12:00 |
06:34:14.85 |
+22:44:24.6 |
HIP 31313 |
18.79 |
| 2026-08-02 00:00 |
06:34:54.64 |
+22:43:46.5 |
HIP 31313 |
22.73 |
| 2026-08-02 12:00 |
06:35:34.38 |
+22:43:07.8 |
HIP 31595 |
27.62 |
| 2026-08-03 00:00 |
06:36:14.05 |
+22:42:28.5 |
HIP 31667 |
19.54 |
| 2026-08-03 12:00 |
06:36:53.67 |
+22:41:48.6 |
HIP 31667 |
10.47 |
| 2026-08-04 00:00 |
06:37:33.22 |
+22:41:08.1 |
HIP 31667 |
2.25 |
| 2026-08-04 12:00 |
06:38:12.72 |
+22:40:27.1 |
HIP 31667 |
8.23 |
| 2026-08-05 00:00 |
06:38:52.16 |
+22:39:45.4 |
HIP 31829 |
6.85 |
| 2026-08-05 12:00 |
06:39:31.53 |
+22:39:03.2 |
HIP 31829 |
4.20 |
| 2026-08-06 00:00 |
06:40:10.84 |
+22:38:20.3 |
HIP 31829 |
12.41 |
| 2026-08-06 12:00 |
06:40:50.09 |
+22:37:36.9 |
HIP 31941 |
17.76 |
| 2026-08-07 00:00 |
06:41:29.28 |
+22:36:53.0 |
HIP 31941 |
22.52 |
| 2026-08-07 12:00 |
06:42:08.40 |
+22:36:08.4 |
HIP 32234 |
23.82 |
| 2026-08-08 00:00 |
06:42:47.45 |
+22:35:23.3 |
HIP 32234 |
15.28 |
| 2026-08-08 12:00 |
06:43:26.44 |
+22:34:37.6 |
HIP 32234 |
7.98 |
| 2026-08-09 00:00 |
06:44:05.36 |
+22:33:51.4 |
HIP 32285 |
4.54 |
| 2026-08-09 12:00 |
06:44:44.21 |
+22:33:04.6 |
HIP 32285 |
4.81 |
| 2026-08-10 00:00 |
06:45:22.99 |
+22:32:17.2 |
HIP 32285 |
13.69 |
| 2026-08-10 12:00 |
06:46:01.70 |
+22:31:29.3 |
HIP 32285 |
22.64 |
| 2026-08-11 00:00 |
06:46:40.34 |
+22:30:40.9 |
HIP 32523 |
20.45 |
| 2026-08-11 12:00 |
06:47:18.91 |
+22:29:51.9 |
HIP 32620 |
16.87 |
| 2026-08-12 00:00 |
06:47:57.41 |
+22:29:02.4 |
HIP 32620 |
9.72 |
| 2026-08-12 12:00 |
06:48:35.82 |
+22:28:12.4 |
HIP 32620 |
7.98 |
| 2026-08-13 00:00 |
06:49:14.17 |
+22:27:21.8 |
HIP 32693 |
8.72 |
| 2026-08-13 12:00 |
06:49:52.44 |
+22:26:30.7 |
HIP 32693 |
11.63 |
| 2026-08-14 00:00 |
06:50:30.63 |
+22:25:39.1 |
HIP 32693 |
18.76 |
| 2026-08-14 12:00 |
06:51:08.74 |
+22:24:47.0 |
HIP 32693 |
26.93 |
| 2026-08-15 00:00 |
06:51:46.77 |
+22:23:54.4 |
HIP 33097 |
34.00 |
| 2026-08-15 12:00 |
06:52:24.73 |
+22:23:01.3 |
HIP 33097 |
28.81 |
| 2026-08-16 00:00 |
06:53:02.60 |
+22:22:07.7 |
HIP 33097 |
25.67 |
| 2026-08-16 12:00 |
06:53:40.39 |
+22:21:13.6 |
HIP 33251 |
23.04 |
| 2026-08-17 00:00 |
06:54:18.10 |
+22:20:19.1 |
HIP 33251 |
17.08 |
| 2026-08-17 12:00 |
06:54:55.72 |
+22:19:24.0 |
HIP 33251 |
14.36 |
| 2026-08-18 00:00 |
06:55:33.27 |
+22:18:28.5 |
HIP 33251 |
16.55 |
| 2026-08-18 12:00 |
06:56:10.72 |
+22:17:32.5 |
HIP 33251 |
22.21 |
| 2026-08-19 00:00 |
06:56:48.10 |
+22:16:36.0 |
HIP 33537 |
22.72 |