P/2007 K2 (Gibbs)
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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
04:53:45.34 |
+13:44:11.8 |
HIP 22607 |
28.46 |
| 2026-02-03 12:00 |
04:53:41.74 |
+13:44:58.1 |
HIP 22607 |
27.74 |
| 2026-02-04 00:00 |
04:53:38.43 |
+13:45:45.1 |
HIP 22607 |
27.13 |
| 2026-02-04 12:00 |
04:53:35.40 |
+13:46:32.8 |
HIP 22607 |
26.62 |
| 2026-02-05 00:00 |
04:53:32.65 |
+13:47:21.1 |
HIP 22607 |
26.21 |
| 2026-02-05 12:00 |
04:53:30.19 |
+13:48:10.2 |
HIP 22607 |
25.91 |
| 2026-02-06 00:00 |
04:53:28.01 |
+13:49:00.0 |
HIP 22607 |
25.72 |
| 2026-02-06 12:00 |
04:53:26.12 |
+13:49:50.5 |
HIP 22607 |
25.62 |
| 2026-02-07 00:00 |
04:53:24.52 |
+13:50:41.6 |
HIP 22607 |
25.64 |
| 2026-02-07 12:00 |
04:53:23.20 |
+13:51:33.5 |
HIP 22607 |
25.75 |
| 2026-02-08 00:00 |
04:53:22.17 |
+13:52:25.9 |
HIP 22667 |
25.68 |
| 2026-02-08 12:00 |
04:53:21.44 |
+13:53:19.1 |
HIP 22667 |
24.82 |
| 2026-02-09 00:00 |
04:53:20.98 |
+13:54:12.9 |
HIP 22667 |
23.98 |
| 2026-02-09 12:00 |
04:53:20.82 |
+13:55:07.4 |
HIP 22667 |
23.18 |
| 2026-02-10 00:00 |
04:53:20.95 |
+13:56:02.4 |
HIP 22667 |
22.41 |
| 2026-02-10 12:00 |
04:53:21.36 |
+13:56:58.2 |
HIP 22667 |
21.69 |
| 2026-02-11 00:00 |
04:53:22.07 |
+13:57:54.5 |
HIP 22667 |
21.01 |
| 2026-02-11 12:00 |
04:53:23.06 |
+13:58:51.5 |
HIP 22667 |
20.39 |
| 2026-02-12 00:00 |
04:53:24.35 |
+13:59:49.1 |
HIP 22667 |
19.83 |
| 2026-02-12 12:00 |
04:53:25.92 |
+14:00:47.3 |
HIP 22667 |
19.35 |
| 2026-02-13 00:00 |
04:53:27.79 |
+14:01:46.0 |
HIP 22667 |
18.96 |
| 2026-02-13 12:00 |
04:53:29.94 |
+14:02:45.4 |
HIP 22667 |
18.67 |
| 2026-02-14 00:00 |
04:53:32.39 |
+14:03:45.4 |
HIP 22667 |
18.49 |
| 2026-02-14 12:00 |
04:53:35.12 |
+14:04:45.9 |
HIP 22667 |
18.44 |
| 2026-02-15 00:00 |
04:53:38.15 |
+14:05:47.0 |
HIP 22667 |
18.53 |
| 2026-02-15 12:00 |
04:53:41.47 |
+14:06:48.6 |
HIP 22667 |
18.75 |
| 2026-02-16 00:00 |
04:53:45.07 |
+14:07:50.8 |
HIP 22667 |
19.13 |
| 2026-02-16 12:00 |
04:53:48.97 |
+14:08:53.5 |
HIP 22667 |
19.65 |
| 2026-02-17 00:00 |
04:53:53.15 |
+14:09:56.8 |
HIP 22667 |
20.33 |
| 2026-02-17 12:00 |
04:53:57.62 |
+14:11:00.5 |
HIP 22667 |
21.15 |
| 2026-02-18 00:00 |
04:54:02.39 |
+14:12:04.8 |
HIP 22667 |
22.11 |
| 2026-02-18 12:00 |
04:54:07.44 |
+14:13:09.6 |
HIP 22667 |
23.21 |
| 2026-02-19 00:00 |
04:54:12.78 |
+14:14:14.9 |
HIP 22853 |
24.27 |
| 2026-02-19 12:00 |
04:54:18.41 |
+14:15:20.7 |
HIP 22853 |
22.67 |
| 2026-02-20 00:00 |
04:54:24.32 |
+14:16:26.9 |
HIP 22853 |
21.06 |
| 2026-02-20 12:00 |
04:54:30.52 |
+14:17:33.6 |
HIP 22853 |
19.45 |
| 2026-02-21 00:00 |
04:54:37.01 |
+14:18:40.8 |
HIP 22853 |
17.86 |
| 2026-02-21 12:00 |
04:54:43.78 |
+14:19:48.4 |
HIP 22853 |
16.32 |
| 2026-02-22 00:00 |
04:54:50.84 |
+14:20:56.5 |
HIP 22853 |
14.86 |
| 2026-02-22 12:00 |
04:54:58.18 |
+14:22:04.9 |
HIP 22853 |
13.55 |
| 2026-02-23 00:00 |
04:55:05.81 |
+14:23:13.8 |
HIP 22853 |
12.47 |
| 2026-02-23 12:00 |
04:55:13.72 |
+14:24:23.1 |
HIP 22853 |
11.70 |
| 2026-02-24 00:00 |
04:55:21.91 |
+14:25:32.8 |
HIP 22853 |
11.36 |