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) |
| 2026-03-26 00:00 |
05:11:34.58 |
+15:41:47.6 |
HIP 24197 |
21.01 |
| 2026-03-26 12:00 |
05:11:58.22 |
+15:43:04.7 |
HIP 24197 |
20.06 |
| 2026-03-27 00:00 |
05:12:22.07 |
+15:44:21.6 |
HIP 24197 |
20.80 |
| 2026-03-27 12:00 |
05:12:46.14 |
+15:45:38.4 |
HIP 24197 |
23.10 |
| 2026-03-28 00:00 |
05:13:10.43 |
+15:46:55.0 |
HIP 24197 |
26.59 |
| 2026-03-28 12:00 |
05:13:34.94 |
+15:48:11.4 |
HIP 24508 |
28.62 |
| 2026-03-29 00:00 |
05:13:59.67 |
+15:49:27.6 |
HIP 24508 |
23.78 |
| 2026-03-29 12:00 |
05:14:24.60 |
+15:50:43.6 |
HIP 24508 |
19.59 |
| 2026-03-30 00:00 |
05:14:49.76 |
+15:51:59.4 |
HIP 24508 |
16.62 |
| 2026-03-30 12:00 |
05:15:15.12 |
+15:53:14.9 |
HIP 24524 |
12.61 |
| 2026-03-31 00:00 |
05:15:40.69 |
+15:54:30.3 |
HIP 24524 |
9.50 |
| 2026-03-31 12:00 |
05:16:06.48 |
+15:55:45.4 |
HIP 24524 |
10.04 |
| 2026-04-01 00:00 |
05:16:32.47 |
+15:57:00.3 |
HIP 24524 |
13.88 |
| 2026-04-01 12:00 |
05:16:58.67 |
+15:58:14.9 |
HIP 24524 |
19.17 |
| 2026-04-02 00:00 |
05:17:25.08 |
+15:59:29.2 |
HIP 24634 |
22.11 |
| 2026-04-02 12:00 |
05:17:51.69 |
+16:00:43.3 |
HIP 24634 |
23.19 |
| 2026-04-03 00:00 |
05:18:18.51 |
+16:01:57.2 |
HIP 24850 |
24.35 |
| 2026-04-03 12:00 |
05:18:45.53 |
+16:03:10.7 |
HIP 24850 |
20.54 |
| 2026-04-04 00:00 |
05:19:12.76 |
+16:04:23.9 |
HIP 24850 |
18.36 |
| 2026-04-04 12:00 |
05:19:40.19 |
+16:05:36.9 |
HIP 24850 |
18.46 |
| 2026-04-05 00:00 |
05:20:07.81 |
+16:06:49.5 |
HIP 24850 |
20.85 |
| 2026-04-05 12:00 |
05:20:35.64 |
+16:08:01.9 |
HIP 25018 |
22.35 |
| 2026-04-06 00:00 |
05:21:03.67 |
+16:09:13.9 |
HIP 25034 |
20.28 |
| 2026-04-06 12:00 |
05:21:31.90 |
+16:10:25.6 |
HIP 25034 |
19.67 |
| 2026-04-07 00:00 |
05:22:00.32 |
+16:11:36.9 |
HIP 25034 |
21.40 |
| 2026-04-07 12:00 |
05:22:28.94 |
+16:12:47.9 |
HIP 25201 |
17.89 |
| 2026-04-08 00:00 |
05:22:57.76 |
+16:13:58.6 |
HIP 25201 |
13.80 |
| 2026-04-08 12:00 |
05:23:26.77 |
+16:15:08.9 |
HIP 25201 |
12.62 |
| 2026-04-09 00:00 |
05:23:55.97 |
+16:16:18.8 |
HIP 25207 |
15.05 |
| 2026-04-09 12:00 |
05:24:25.37 |
+16:17:28.4 |
HIP 25287 |
19.09 |
| 2026-04-10 00:00 |
05:24:54.96 |
+16:18:37.6 |
HIP 25287 |
20.69 |
| 2026-04-10 12:00 |
05:25:24.74 |
+16:19:46.3 |
HIP 25372 |
18.73 |
| 2026-04-11 00:00 |
05:25:54.71 |
+16:20:54.7 |
HIP 25372 |
17.63 |
| 2026-04-11 12:00 |
05:26:24.87 |
+16:22:02.7 |
HIP 25372 |
19.43 |
| 2026-04-12 00:00 |
05:26:55.22 |
+16:23:10.2 |
HIP 25589 |
18.04 |
| 2026-04-12 12:00 |
05:27:25.75 |
+16:24:17.4 |
HIP 25589 |
10.64 |
| 2026-04-13 00:00 |
05:27:56.48 |
+16:25:24.1 |
HIP 25589 |
3.21 |
| 2026-04-13 12:00 |
05:28:27.39 |
+16:26:30.3 |
HIP 25589 |
4.35 |
| 2026-04-14 00:00 |
05:28:58.48 |
+16:27:36.2 |
HIP 25657 |
2.84 |
| 2026-04-14 12:00 |
05:29:29.76 |
+16:28:41.5 |
HIP 25657 |
10.00 |
| 2026-04-15 00:00 |
05:30:01.22 |
+16:29:46.4 |
HIP 25657 |
17.55 |
| 2026-04-15 12:00 |
05:30:32.86 |
+16:30:50.8 |
HIP 25657 |
25.19 |
| 2026-04-16 00:00 |
05:31:04.69 |
+16:31:54.8 |
HIP 25657 |
32.88 |