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) |
| 2026-07-29 00:00 |
08:05:59.35 |
+14:55:06.1 |
HIP 39578 |
14.65 |
| 2026-07-29 12:00 |
08:06:52.01 |
+14:52:39.2 |
HIP 39708 |
16.75 |
| 2026-07-30 00:00 |
08:07:44.70 |
+14:50:11.1 |
HIP 39837 |
9.19 |
| 2026-07-30 12:00 |
08:08:37.43 |
+14:47:41.7 |
HIP 39837 |
5.05 |
| 2026-07-31 00:00 |
08:09:30.20 |
+14:45:11.0 |
HIP 39999 |
17.13 |
| 2026-07-31 12:00 |
08:10:23.01 |
+14:42:39.2 |
HIP 40058 |
9.96 |
| 2026-08-01 00:00 |
08:11:15.85 |
+14:40:06.0 |
HIP 40058 |
4.72 |
| 2026-08-01 12:00 |
08:12:08.73 |
+14:37:31.7 |
HIP 40194 |
7.17 |
| 2026-08-02 00:00 |
08:13:01.64 |
+14:34:56.1 |
HIP 40194 |
6.00 |
| 2026-08-02 12:00 |
08:13:54.59 |
+14:32:19.2 |
HIP 40194 |
19.04 |
| 2026-08-03 00:00 |
08:14:47.58 |
+14:29:41.1 |
HIP 40525 |
25.28 |
| 2026-08-03 12:00 |
08:15:40.60 |
+14:27:01.8 |
HIP 40525 |
12.17 |
| 2026-08-04 00:00 |
08:16:33.65 |
+14:24:21.2 |
HIP 40525 |
0.97 |
| 2026-08-04 12:00 |
08:17:26.74 |
+14:21:39.4 |
HIP 40525 |
14.09 |
| 2026-08-05 00:00 |
08:18:19.86 |
+14:18:56.4 |
HIP 40719 |
6.04 |
| 2026-08-05 12:00 |
08:19:13.02 |
+14:16:12.1 |
HIP 40761 |
4.17 |
| 2026-08-06 00:00 |
08:20:06.21 |
+14:13:26.6 |
HIP 40761 |
12.88 |
| 2026-08-06 12:00 |
08:20:59.43 |
+14:10:39.8 |
HIP 40910 |
6.42 |
| 2026-08-07 00:00 |
08:21:52.68 |
+14:07:51.8 |
HIP 40982 |
11.34 |
| 2026-08-07 12:00 |
08:22:45.97 |
+14:05:02.6 |
HIP 40982 |
19.84 |
| 2026-08-08 00:00 |
08:23:39.29 |
+14:02:12.2 |
HIP 41197 |
11.80 |
| 2026-08-08 12:00 |
08:24:32.64 |
+13:59:20.5 |
HIP 41197 |
7.91 |
| 2026-08-09 00:00 |
08:25:26.01 |
+13:56:27.6 |
HIP 41197 |
18.38 |
| 2026-08-09 12:00 |
08:26:19.42 |
+13:53:33.5 |
HIP 41348 |
20.61 |
| 2026-08-10 00:00 |
08:27:12.86 |
+13:50:38.1 |
HIP 41348 |
23.41 |
| 2026-08-10 12:00 |
08:28:06.32 |
+13:47:41.5 |
HIP 41578 |
26.07 |
| 2026-08-11 00:00 |
08:28:59.82 |
+13:44:43.7 |
HIP 41578 |
28.45 |
| 2026-08-11 12:00 |
08:29:53.34 |
+13:41:44.7 |
HIP 41635 |
34.24 |
| 2026-08-12 00:00 |
08:30:46.88 |
+13:38:44.5 |
HIP 41635 |
36.55 |
| 2026-08-12 12:00 |
08:31:40.46 |
+13:35:43.1 |
HIP 41997 |
28.36 |
| 2026-08-13 00:00 |
08:32:34.06 |
+13:32:40.5 |
HIP 41997 |
15.21 |
| 2026-08-13 12:00 |
08:33:27.68 |
+13:29:36.6 |
HIP 41997 |
4.07 |
| 2026-08-14 00:00 |
08:34:21.33 |
+13:26:31.6 |
HIP 41997 |
12.67 |
| 2026-08-14 12:00 |
08:35:15.00 |
+13:23:25.4 |
HIP 42010 |
23.29 |
| 2026-08-15 00:00 |
08:36:08.70 |
+13:20:18.0 |
HIP 42195 |
25.88 |
| 2026-08-15 12:00 |
08:37:02.41 |
+13:17:09.4 |
HIP 42373 |
28.85 |
| 2026-08-16 00:00 |
08:37:56.15 |
+13:13:59.6 |
HIP 42373 |
19.13 |
| 2026-08-16 12:00 |
08:38:49.92 |
+13:10:48.6 |
HIP 42446 |
14.61 |
| 2026-08-17 00:00 |
08:39:43.70 |
+13:07:36.5 |
HIP 42446 |
12.06 |
| 2026-08-17 12:00 |
08:40:37.51 |
+13:04:23.2 |
HIP 42630 |
12.21 |
| 2026-08-18 00:00 |
08:41:31.33 |
+13:01:08.7 |
HIP 42630 |
11.45 |
| 2026-08-18 12:00 |
08:42:25.18 |
+12:57:53.1 |
HIP 42795 |
20.55 |
| 2026-08-19 00:00 |
08:43:19.04 |
+12:54:36.3 |
HIP 42795 |
13.85 |