メタデータ
| 項目 |
値 |
| Designation |
P/2007 Q2 (Gilmore) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-08-23T21:08:36.447360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:11Z |
| Obs used |
146 |
| NEO |
- |
| M1 |
16.700 |
| 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) |
2007-09-13.0000000 |
| e |
0.67122948 |
| q (au) |
1.839016 |
| a (au) |
5.593616 |
| i (deg) |
10.238439 |
| Ω (om, deg) |
172.248957 |
| ω (w, deg) |
163.150307 |
| M (ma, deg) |
1.498898 |
等級
散乱 + 全体線形
$$
M_a = (16.814 + 3.468\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.814 |
| n |
3.468 |
| gf |
0.979 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-09-25 00:00 |
10:10:28.71 |
+07:17:40.9 |
HIP 49861 |
24.83 |
| 2026-09-25 12:00 |
10:10:40.11 |
+07:16:36.3 |
HIP 49861 |
25.33 |
| 2026-09-26 00:00 |
10:10:51.46 |
+07:15:32.0 |
HIP 49861 |
26.16 |
| 2026-09-26 12:00 |
10:11:02.77 |
+07:14:27.7 |
HIP 49861 |
27.29 |
| 2026-09-27 00:00 |
10:11:14.04 |
+07:13:23.5 |
HIP 49861 |
28.70 |
| 2026-09-27 12:00 |
10:11:25.27 |
+07:12:19.5 |
HIP 49861 |
30.33 |
| 2026-09-28 00:00 |
10:11:36.46 |
+07:11:15.6 |
HIP 49861 |
32.15 |
| 2026-09-28 12:00 |
10:11:47.60 |
+07:10:11.8 |
HIP 49999 |
31.73 |
| 2026-09-29 00:00 |
10:11:58.70 |
+07:09:08.2 |
HIP 49999 |
29.96 |
| 2026-09-29 12:00 |
10:12:09.75 |
+07:08:04.7 |
HIP 49999 |
28.39 |
| 2026-09-30 00:00 |
10:12:20.76 |
+07:07:01.4 |
HIP 49999 |
27.06 |
| 2026-09-30 12:00 |
10:12:31.73 |
+07:05:58.2 |
HIP 49999 |
25.99 |
| 2026-10-01 00:00 |
10:12:42.65 |
+07:04:55.1 |
HIP 49999 |
25.22 |
| 2026-10-01 12:00 |
10:12:53.52 |
+07:03:52.3 |
HIP 49999 |
24.76 |
| 2026-10-02 00:00 |
10:13:04.34 |
+07:02:49.5 |
HIP 50178 |
22.65 |
| 2026-10-02 12:00 |
10:13:15.12 |
+07:01:47.0 |
HIP 50178 |
19.82 |
| 2026-10-03 00:00 |
10:13:25.85 |
+07:00:44.6 |
HIP 50178 |
17.01 |
| 2026-10-03 12:00 |
10:13:36.53 |
+06:59:42.3 |
HIP 50178 |
14.24 |
| 2026-10-04 00:00 |
10:13:47.17 |
+06:58:40.3 |
HIP 50178 |
11.52 |
| 2026-10-04 12:00 |
10:13:57.75 |
+06:57:38.4 |
HIP 50178 |
8.89 |
| 2026-10-05 00:00 |
10:14:08.28 |
+06:56:36.7 |
HIP 50178 |
6.42 |
| 2026-10-05 12:00 |
10:14:18.76 |
+06:55:35.2 |
HIP 50178 |
4.40 |
| 2026-10-06 00:00 |
10:14:29.19 |
+06:54:33.8 |
HIP 50178 |
3.61 |
| 2026-10-06 12:00 |
10:14:39.57 |
+06:53:32.7 |
HIP 50178 |
4.72 |
| 2026-10-07 00:00 |
10:14:49.90 |
+06:52:31.7 |
HIP 50178 |
6.83 |
| 2026-10-07 12:00 |
10:15:00.17 |
+06:51:31.0 |
HIP 50178 |
9.27 |
| 2026-10-08 00:00 |
10:15:10.39 |
+06:50:30.5 |
HIP 50255 |
9.37 |
| 2026-10-08 12:00 |
10:15:20.55 |
+06:49:30.2 |
HIP 50255 |
8.09 |
| 2026-10-09 00:00 |
10:15:30.66 |
+06:48:30.1 |
HIP 50255 |
7.61 |
| 2026-10-09 12:00 |
10:15:40.72 |
+06:47:30.2 |
HIP 50255 |
8.05 |
| 2026-10-10 00:00 |
10:15:50.71 |
+06:46:30.5 |
HIP 50255 |
9.28 |
| 2026-10-10 12:00 |
10:16:00.65 |
+06:45:31.1 |
HIP 50255 |
11.02 |
| 2026-10-11 00:00 |
10:16:10.54 |
+06:44:31.9 |
HIP 50255 |
13.07 |
| 2026-10-11 12:00 |
10:16:20.36 |
+06:43:32.9 |
HIP 50255 |
15.28 |
| 2026-10-12 00:00 |
10:16:30.13 |
+06:42:34.2 |
HIP 50255 |
17.60 |
| 2026-10-12 12:00 |
10:16:39.84 |
+06:41:35.7 |
HIP 50255 |
19.98 |
| 2026-10-13 00:00 |
10:16:49.49 |
+06:40:37.5 |
HIP 50423 |
20.94 |
| 2026-10-13 12:00 |
10:16:59.07 |
+06:39:39.5 |
HIP 50423 |
18.68 |
| 2026-10-14 00:00 |
10:17:08.60 |
+06:38:41.8 |
HIP 50423 |
16.51 |
| 2026-10-14 12:00 |
10:17:18.07 |
+06:37:44.3 |
HIP 50423 |
14.48 |
| 2026-10-15 00:00 |
10:17:27.47 |
+06:36:47.1 |
HIP 50423 |
12.65 |
| 2026-10-15 12:00 |
10:17:36.81 |
+06:35:50.1 |
HIP 50423 |
11.09 |
| 2026-10-16 00:00 |
10:17:46.09 |
+06:34:53.5 |
HIP 50423 |
9.94 |