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 |
-1.9498 |
+1.190 |
| 2011-07-06 |
2011-10-24 |
+55.4826 |
-25.761 |
| 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) |
| 2026-07-29 00:00 |
04:05:34.77 |
-03:47:47.3 |
HIP 19027 |
31.55 |
| 2026-07-29 12:00 |
04:05:36.64 |
-03:48:02.0 |
HIP 19027 |
32.00 |
| 2026-07-30 00:00 |
04:05:38.49 |
-03:48:17.0 |
HIP 19027 |
32.45 |
| 2026-07-30 12:00 |
04:05:40.31 |
-03:48:32.1 |
HIP 19027 |
32.90 |
| 2026-07-31 00:00 |
04:05:42.10 |
-03:48:47.3 |
HIP 19027 |
33.35 |
| 2026-07-31 12:00 |
04:05:43.87 |
-03:49:02.7 |
HIP 19027 |
33.80 |
| 2026-08-01 00:00 |
04:05:45.61 |
-03:49:18.3 |
HIP 19027 |
34.25 |
| 2026-08-01 12:00 |
04:05:47.32 |
-03:49:34.1 |
HIP 19027 |
34.70 |
| 2026-08-02 00:00 |
04:05:49.00 |
-03:49:50.0 |
HIP 19027 |
35.15 |
| 2026-08-02 12:00 |
04:05:50.66 |
-03:50:06.0 |
HIP 19027 |
35.60 |
| 2026-08-03 00:00 |
04:05:52.29 |
-03:50:22.3 |
HIP 19027 |
36.05 |
| 2026-08-03 12:00 |
04:05:53.89 |
-03:50:38.6 |
HIP 19027 |
36.50 |
| 2026-08-04 00:00 |
04:05:55.47 |
-03:50:55.2 |
HIP 19282 |
36.57 |
| 2026-08-04 12:00 |
04:05:57.02 |
-03:51:11.8 |
HIP 19282 |
36.09 |
| 2026-08-05 00:00 |
04:05:58.53 |
-03:51:28.7 |
HIP 19282 |
35.62 |
| 2026-08-05 12:00 |
04:06:00.03 |
-03:51:45.7 |
HIP 19282 |
35.16 |
| 2026-08-06 00:00 |
04:06:01.49 |
-03:52:02.8 |
HIP 19282 |
34.70 |
| 2026-08-06 12:00 |
04:06:02.92 |
-03:52:20.1 |
HIP 19282 |
34.24 |
| 2026-08-07 00:00 |
04:06:04.33 |
-03:52:37.6 |
HIP 19282 |
33.79 |
| 2026-08-07 12:00 |
04:06:05.71 |
-03:52:55.2 |
HIP 19282 |
33.34 |
| 2026-08-08 00:00 |
04:06:07.05 |
-03:53:12.9 |
HIP 19282 |
32.89 |
| 2026-08-08 12:00 |
04:06:08.37 |
-03:53:30.8 |
HIP 19282 |
32.46 |
| 2026-08-09 00:00 |
04:06:09.67 |
-03:53:48.8 |
HIP 19282 |
32.02 |
| 2026-08-09 12:00 |
04:06:10.93 |
-03:54:07.0 |
HIP 19282 |
31.60 |
| 2026-08-10 00:00 |
04:06:12.16 |
-03:54:25.3 |
HIP 19282 |
31.17 |
| 2026-08-10 12:00 |
04:06:13.36 |
-03:54:43.8 |
HIP 19282 |
30.75 |
| 2026-08-11 00:00 |
04:06:14.54 |
-03:55:02.4 |
HIP 19282 |
30.34 |
| 2026-08-11 12:00 |
04:06:15.68 |
-03:55:21.2 |
HIP 19282 |
29.93 |
| 2026-08-12 00:00 |
04:06:16.80 |
-03:55:40.0 |
HIP 19282 |
29.53 |
| 2026-08-12 12:00 |
04:06:17.88 |
-03:55:59.1 |
HIP 19282 |
29.14 |
| 2026-08-13 00:00 |
04:06:18.94 |
-03:56:18.2 |
HIP 19282 |
28.75 |
| 2026-08-13 12:00 |
04:06:19.96 |
-03:56:37.5 |
HIP 19282 |
28.36 |
| 2026-08-14 00:00 |
04:06:20.96 |
-03:56:56.9 |
HIP 19282 |
27.99 |
| 2026-08-14 12:00 |
04:06:21.92 |
-03:57:16.5 |
HIP 19282 |
27.61 |
| 2026-08-15 00:00 |
04:06:22.86 |
-03:57:36.1 |
HIP 19282 |
27.25 |
| 2026-08-15 12:00 |
04:06:23.76 |
-03:57:55.9 |
HIP 19282 |
26.89 |
| 2026-08-16 00:00 |
04:06:24.64 |
-03:58:15.9 |
HIP 19282 |
26.54 |
| 2026-08-16 12:00 |
04:06:25.48 |
-03:58:35.9 |
HIP 19282 |
26.19 |
| 2026-08-17 00:00 |
04:06:26.30 |
-03:58:56.1 |
HIP 19282 |
25.86 |
| 2026-08-17 12:00 |
04:06:27.08 |
-03:59:16.4 |
HIP 19282 |
25.53 |
| 2026-08-18 00:00 |
04:06:27.83 |
-03:59:36.8 |
HIP 19282 |
25.20 |
| 2026-08-18 12:00 |
04:06:28.56 |
-03:59:57.3 |
HIP 19282 |
24.89 |
| 2026-08-19 00:00 |
04:06:29.25 |
-04:00:18.0 |
HIP 19282 |
24.58 |