メタデータ
| 項目 |
値 |
| Designation |
P/2007 K2 (Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-06-08T10:37:30.066240Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:56Z |
| Obs used |
58 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-05-18.0000000 |
| e |
0.68500895 |
| q (au) |
2.268935 |
| a (au) |
7.203173 |
| i (deg) |
7.619939 |
| Ω (om, deg) |
189.849241 |
| ω (w, deg) |
345.679250 |
| M (ma, deg) |
358.906804 |
等級
散乱 + 全体線形
$$
M_a = (12.449 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.449 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.978 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
09:41:14.19 |
+08:47:05.4 |
HIP 47518 |
12.64 |
| 2026-09-20 12:00 |
09:42:08.68 |
+08:42:41.6 |
HIP 47656 |
14.04 |
| 2026-09-21 00:00 |
09:43:03.16 |
+08:38:17.0 |
HIP 47656 |
10.29 |
| 2026-09-21 12:00 |
09:43:57.65 |
+08:33:51.5 |
HIP 47656 |
20.41 |
| 2026-09-22 00:00 |
09:44:52.12 |
+08:29:25.2 |
HIP 47852 |
15.11 |
| 2026-09-22 12:00 |
09:45:46.60 |
+08:24:58.1 |
HIP 47852 |
20.10 |
| 2026-09-23 00:00 |
09:46:41.07 |
+08:20:30.1 |
HIP 48014 |
16.30 |
| 2026-09-23 12:00 |
09:47:35.55 |
+08:16:01.4 |
HIP 48014 |
18.81 |
| 2026-09-24 00:00 |
09:48:30.01 |
+08:11:31.8 |
HIP 48145 |
8.66 |
| 2026-09-24 12:00 |
09:49:24.48 |
+08:07:01.4 |
HIP 48145 |
13.58 |
| 2026-09-25 00:00 |
09:50:18.94 |
+08:02:30.3 |
HIP 48309 |
10.32 |
| 2026-09-25 12:00 |
09:51:13.40 |
+07:57:58.3 |
HIP 48309 |
10.67 |
| 2026-09-26 00:00 |
09:52:07.85 |
+07:53:25.6 |
HIP 48412 |
13.36 |
| 2026-09-26 12:00 |
09:53:02.30 |
+07:48:52.1 |
HIP 48412 |
21.82 |
| 2026-09-27 00:00 |
09:53:56.75 |
+07:44:17.8 |
HIP 48553 |
20.32 |
| 2026-09-27 12:00 |
09:54:51.19 |
+07:39:42.8 |
HIP 48668 |
10.37 |
| 2026-09-28 00:00 |
09:55:45.63 |
+07:35:07.0 |
HIP 48699 |
5.99 |
| 2026-09-28 12:00 |
09:56:40.07 |
+07:30:30.5 |
HIP 48699 |
15.08 |
| 2026-09-29 00:00 |
09:57:34.50 |
+07:25:53.2 |
HIP 48699 |
28.73 |
| 2026-09-29 12:00 |
09:58:28.92 |
+07:21:15.2 |
HIP 49100 |
42.48 |
| 2026-09-30 00:00 |
09:59:23.34 |
+07:16:36.4 |
HIP 49100 |
28.38 |
| 2026-09-30 12:00 |
10:00:17.75 |
+07:11:57.0 |
HIP 49100 |
14.63 |
| 2026-10-01 00:00 |
10:01:12.16 |
+07:07:16.8 |
HIP 49100 |
5.49 |
| 2026-10-01 12:00 |
10:02:06.56 |
+07:02:35.9 |
HIP 49100 |
15.95 |
| 2026-10-02 00:00 |
10:03:00.96 |
+06:57:54.3 |
HIP 49316 |
19.34 |
| 2026-10-02 12:00 |
10:03:55.35 |
+06:53:12.1 |
HIP 49316 |
17.41 |
| 2026-10-03 00:00 |
10:04:49.73 |
+06:48:29.1 |
HIP 49316 |
25.32 |
| 2026-10-03 12:00 |
10:05:44.10 |
+06:43:45.5 |
HIP 49519 |
16.96 |
| 2026-10-04 00:00 |
10:06:38.47 |
+06:39:01.2 |
HIP 49519 |
15.33 |
| 2026-10-04 12:00 |
10:07:32.83 |
+06:34:16.2 |
HIP 49626 |
16.85 |
| 2026-10-05 00:00 |
10:08:27.18 |
+06:29:30.6 |
HIP 49704 |
14.53 |
| 2026-10-05 12:00 |
10:09:21.52 |
+06:24:44.4 |
HIP 49739 |
14.58 |
| 2026-10-06 00:00 |
10:10:15.84 |
+06:19:57.5 |
HIP 49888 |
16.94 |
| 2026-10-06 12:00 |
10:11:10.16 |
+06:15:10.0 |
HIP 49888 |
5.09 |
| 2026-10-07 00:00 |
10:12:04.47 |
+06:10:22.0 |
HIP 49888 |
13.24 |
| 2026-10-07 12:00 |
10:12:58.77 |
+06:05:33.3 |
HIP 50112 |
13.10 |
| 2026-10-08 00:00 |
10:13:53.06 |
+06:00:44.0 |
HIP 50112 |
3.66 |
| 2026-10-08 12:00 |
10:14:47.33 |
+05:55:54.2 |
HIP 50190 |
10.98 |
| 2026-10-09 00:00 |
10:15:41.59 |
+05:51:03.7 |
HIP 50190 |
15.70 |
| 2026-10-09 12:00 |
10:16:35.83 |
+05:46:12.8 |
HIP 50190 |
27.99 |
| 2026-10-10 00:00 |
10:17:30.07 |
+05:41:21.2 |
HIP 50428 |
19.52 |
| 2026-10-10 12:00 |
10:18:24.29 |
+05:36:29.2 |
HIP 50428 |
16.71 |
| 2026-10-11 00:00 |
10:19:18.49 |
+05:31:36.6 |
HIP 50639 |
21.13 |