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) |
| 2026-03-26 00:00 |
03:43:44.55 |
+19:33:22.6 |
HIP 17408 |
6.56 |
| 2026-03-26 12:00 |
03:44:17.03 |
+19:35:03.8 |
HIP 17408 |
8.55 |
| 2026-03-27 00:00 |
03:44:49.63 |
+19:36:44.9 |
HIP 17503 |
13.11 |
| 2026-03-27 12:00 |
03:45:22.35 |
+19:38:26.1 |
HIP 17503 |
13.33 |
| 2026-03-28 00:00 |
03:45:55.19 |
+19:40:07.1 |
HIP 17503 |
17.57 |
| 2026-03-28 12:00 |
03:46:28.14 |
+19:41:48.2 |
HIP 17503 |
23.78 |
| 2026-03-29 00:00 |
03:47:01.21 |
+19:43:29.2 |
HIP 17503 |
30.83 |
| 2026-03-29 12:00 |
03:47:34.40 |
+19:45:10.2 |
HIP 17920 |
34.91 |
| 2026-03-30 00:00 |
03:48:07.69 |
+19:46:51.1 |
HIP 17920 |
28.32 |
| 2026-03-30 12:00 |
03:48:41.10 |
+19:48:31.9 |
HIP 17920 |
22.65 |
| 2026-03-31 00:00 |
03:49:14.63 |
+19:50:12.6 |
HIP 17920 |
18.79 |
| 2026-03-31 12:00 |
03:49:48.26 |
+19:51:53.3 |
HIP 17920 |
17.97 |
| 2026-04-01 00:00 |
03:50:22.00 |
+19:53:33.8 |
HIP 17920 |
20.59 |
| 2026-04-01 12:00 |
03:50:55.85 |
+19:55:14.3 |
HIP 18091 |
24.71 |
| 2026-04-02 00:00 |
03:51:29.81 |
+19:56:54.7 |
HIP 18091 |
22.32 |
| 2026-04-02 12:00 |
03:52:03.88 |
+19:58:34.9 |
HIP 18165 |
19.42 |
| 2026-04-03 00:00 |
03:52:38.06 |
+20:00:15.1 |
HIP 18165 |
13.42 |
| 2026-04-03 12:00 |
03:53:12.34 |
+20:01:55.1 |
HIP 18165 |
10.86 |
| 2026-04-04 00:00 |
03:53:46.73 |
+20:03:35.0 |
HIP 18165 |
13.83 |
| 2026-04-04 12:00 |
03:54:21.22 |
+20:05:14.7 |
HIP 18165 |
20.03 |
| 2026-04-05 00:00 |
03:54:55.82 |
+20:06:54.3 |
HIP 18165 |
27.37 |
| 2026-04-05 12:00 |
03:55:30.52 |
+20:08:33.8 |
HIP 18473 |
19.62 |
| 2026-04-06 00:00 |
03:56:05.32 |
+20:10:13.1 |
HIP 18473 |
12.28 |
| 2026-04-06 12:00 |
03:56:40.23 |
+20:11:52.2 |
HIP 18473 |
7.45 |
| 2026-04-07 00:00 |
03:57:15.24 |
+20:13:31.1 |
HIP 18473 |
10.01 |
| 2026-04-07 12:00 |
03:57:50.34 |
+20:15:09.9 |
HIP 18473 |
16.90 |
| 2026-04-08 00:00 |
03:58:25.55 |
+20:16:48.5 |
HIP 18544 |
24.45 |
| 2026-04-08 12:00 |
03:59:00.86 |
+20:18:26.9 |
HIP 18721 |
23.23 |
| 2026-04-09 00:00 |
03:59:36.26 |
+20:20:05.1 |
HIP 18721 |
15.05 |
| 2026-04-09 12:00 |
04:00:11.77 |
+20:21:43.1 |
HIP 18719 |
6.58 |
| 2026-04-10 00:00 |
04:00:47.37 |
+20:23:20.9 |
HIP 18719 |
1.93 |
| 2026-04-10 12:00 |
04:01:23.07 |
+20:24:58.5 |
HIP 18719 |
10.44 |
| 2026-04-11 00:00 |
04:01:58.86 |
+20:26:35.9 |
HIP 18792 |
11.31 |
| 2026-04-11 12:00 |
04:02:34.75 |
+20:28:13.0 |
HIP 18792 |
16.28 |
| 2026-04-12 00:00 |
04:03:10.73 |
+20:29:49.9 |
HIP 19002 |
19.30 |
| 2026-04-12 12:00 |
04:03:46.81 |
+20:31:26.5 |
HIP 19002 |
11.94 |
| 2026-04-13 00:00 |
04:04:22.98 |
+20:33:03.0 |
HIP 19002 |
7.77 |
| 2026-04-13 12:00 |
04:04:59.24 |
+20:34:39.1 |
HIP 19002 |
11.27 |
| 2026-04-14 00:00 |
04:05:35.59 |
+20:36:15.0 |
HIP 19146 |
9.31 |
| 2026-04-14 12:00 |
04:06:12.03 |
+20:37:50.6 |
HIP 19146 |
2.25 |
| 2026-04-15 00:00 |
04:06:48.57 |
+20:39:26.0 |
HIP 19146 |
8.61 |
| 2026-04-15 12:00 |
04:07:25.19 |
+20:41:01.0 |
HIP 19146 |
17.18 |
| 2026-04-16 00:00 |
04:08:01.90 |
+20:42:35.8 |
HIP 19367 |
23.11 |