メタデータ
| 項目 |
値 |
| Designation |
C/2011 A3 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-12-16T02:06:29.868480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-16T12:05:53Z |
| Obs used |
1747 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
8.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-07-07.0000000 |
| e |
0.99799388 |
| q (au) |
2.344841 |
| a (au) |
1168.845517 |
| i (deg) |
26.074353 |
| Ω (om, deg) |
124.895272 |
| ω (w, deg) |
141.161078 |
| M (ma, deg) |
359.996002 |
等級
散乱 + 全体線形
$$
M_a = (7.606 + 4.476\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.606 |
| n |
4.476 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2011-01-15 |
2011-07-06 |
-1.9497 |
+1.190 |
| 2011-07-06 |
2011-10-24 |
+55.4815 |
-25.760 |
| 2012-03-05 |
2012-09-09 |
-0.6396 |
-0.001 |
| 2012-09-09 |
2013-10-06 |
-6.5562 |
+2.870 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
03:52:05.63 |
-04:23:52.5 |
HIP 18164 |
13.62 |
| 2026-03-26 12:00 |
03:52:07.98 |
-04:23:25.4 |
HIP 18164 |
12.99 |
| 2026-03-27 00:00 |
03:52:10.35 |
-04:22:58.4 |
HIP 18164 |
12.36 |
| 2026-03-27 12:00 |
03:52:12.75 |
-04:22:31.5 |
HIP 18164 |
11.75 |
| 2026-03-28 00:00 |
03:52:15.17 |
-04:22:04.6 |
HIP 18164 |
11.14 |
| 2026-03-28 12:00 |
03:52:17.62 |
-04:21:37.7 |
HIP 18164 |
10.55 |
| 2026-03-29 00:00 |
03:52:20.09 |
-04:21:11.0 |
HIP 18164 |
9.97 |
| 2026-03-29 12:00 |
03:52:22.59 |
-04:20:44.3 |
HIP 18164 |
9.41 |
| 2026-03-30 00:00 |
03:52:25.10 |
-04:20:17.6 |
HIP 18164 |
8.88 |
| 2026-03-30 12:00 |
03:52:27.65 |
-04:19:51.0 |
HIP 18164 |
8.38 |
| 2026-03-31 00:00 |
03:52:30.21 |
-04:19:24.5 |
HIP 18164 |
7.92 |
| 2026-03-31 12:00 |
03:52:32.80 |
-04:18:58.1 |
HIP 18164 |
7.50 |
| 2026-04-01 00:00 |
03:52:35.41 |
-04:18:31.7 |
HIP 18164 |
7.14 |
| 2026-04-01 12:00 |
03:52:38.04 |
-04:18:05.5 |
HIP 18164 |
6.84 |
| 2026-04-02 00:00 |
03:52:40.70 |
-04:17:39.2 |
HIP 18164 |
6.63 |
| 2026-04-02 12:00 |
03:52:43.38 |
-04:17:13.1 |
HIP 18164 |
6.49 |
| 2026-04-03 00:00 |
03:52:46.08 |
-04:16:47.0 |
HIP 18164 |
6.45 |
| 2026-04-03 12:00 |
03:52:48.80 |
-04:16:21.1 |
HIP 18164 |
6.51 |
| 2026-04-04 00:00 |
03:52:51.54 |
-04:15:55.2 |
HIP 18164 |
6.66 |
| 2026-04-04 12:00 |
03:52:54.31 |
-04:15:29.3 |
HIP 18164 |
6.90 |
| 2026-04-05 00:00 |
03:52:57.10 |
-04:15:03.6 |
HIP 18164 |
7.22 |
| 2026-04-05 12:00 |
03:52:59.90 |
-04:14:37.9 |
HIP 18164 |
7.61 |
| 2026-04-06 00:00 |
03:53:02.73 |
-04:14:12.4 |
HIP 18164 |
8.07 |
| 2026-04-06 12:00 |
03:53:05.58 |
-04:13:46.9 |
HIP 18164 |
8.58 |
| 2026-04-07 00:00 |
03:53:08.45 |
-04:13:21.5 |
HIP 18164 |
9.14 |
| 2026-04-07 12:00 |
03:53:11.34 |
-04:12:56.2 |
HIP 18164 |
9.74 |
| 2026-04-08 00:00 |
03:53:14.26 |
-04:12:31.0 |
HIP 18164 |
10.37 |
| 2026-04-08 12:00 |
03:53:17.19 |
-04:12:05.9 |
HIP 18164 |
11.03 |
| 2026-04-09 00:00 |
03:53:20.14 |
-04:11:40.9 |
HIP 18164 |
11.71 |
| 2026-04-09 12:00 |
03:53:23.11 |
-04:11:15.9 |
HIP 18164 |
12.41 |
| 2026-04-10 00:00 |
03:53:26.10 |
-04:10:51.1 |
HIP 18164 |
13.14 |
| 2026-04-10 12:00 |
03:53:29.11 |
-04:10:26.4 |
HIP 18164 |
13.87 |
| 2026-04-11 00:00 |
03:53:32.14 |
-04:10:01.8 |
HIP 18164 |
14.63 |
| 2026-04-11 12:00 |
03:53:35.19 |
-04:09:37.3 |
HIP 18276 |
14.78 |
| 2026-04-12 00:00 |
03:53:38.25 |
-04:09:12.8 |
HIP 18276 |
14.02 |
| 2026-04-12 12:00 |
03:53:41.34 |
-04:08:48.5 |
HIP 18276 |
13.27 |
| 2026-04-13 00:00 |
03:53:44.44 |
-04:08:24.3 |
HIP 18276 |
12.52 |
| 2026-04-13 12:00 |
03:53:47.56 |
-04:08:00.2 |
HIP 18276 |
11.79 |
| 2026-04-14 00:00 |
03:53:50.70 |
-04:07:36.3 |
HIP 18276 |
11.07 |
| 2026-04-14 12:00 |
03:53:53.86 |
-04:07:12.4 |
HIP 18276 |
10.38 |
| 2026-04-15 00:00 |
03:53:57.04 |
-04:06:48.6 |
HIP 18276 |
9.71 |
| 2026-04-15 12:00 |
03:54:00.23 |
-04:06:25.0 |
HIP 18276 |
9.07 |
| 2026-04-16 00:00 |
03:54:03.44 |
-04:06:01.5 |
HIP 18276 |
8.47 |