メタデータ
| 項目 |
値 |
| Designation |
C/2011 J2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-12-25T07:20:37.112640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:49Z |
| Obs used |
6434 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
7.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-01-22.0000000 |
| e |
1.00050456 |
| q (au) |
3.443446 |
| a (au) |
-6824.670055 |
| i (deg) |
122.798823 |
| Ω (om, deg) |
163.947568 |
| ω (w, deg) |
85.296082 |
| M (ma, deg) |
0.000048 |
等級
散乱 + 全体線形
$$
M_a = (8.869 + 2.029\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.869 |
| n |
2.029 |
| gf |
1.000 |
| gb |
-0.970 |
| 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 |
| 2011-03-10 |
2013-12-24 |
+0.7312 |
-0.692 |
| 2013-12-26 |
2014-08-07 |
+5.5794 |
-3.398 |
| 2014-08-07 |
2017-09-15 |
-0.6811 |
+0.668 |
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) |
| 2026-06-01 00:00 |
22:30:30.76 |
-48:25:23.4 |
HIP 111142 |
7.96 |
| 2026-06-01 12:00 |
22:30:30.13 |
-48:26:12.0 |
HIP 111142 |
8.68 |
| 2026-06-02 00:00 |
22:30:29.44 |
-48:27:00.8 |
HIP 111142 |
9.43 |
| 2026-06-02 12:00 |
22:30:28.70 |
-48:27:49.7 |
HIP 111027 |
10.02 |
| 2026-06-03 00:00 |
22:30:27.91 |
-48:28:38.8 |
HIP 111027 |
9.60 |
| 2026-06-03 12:00 |
22:30:27.06 |
-48:29:28.0 |
HIP 111027 |
9.23 |
| 2026-06-04 00:00 |
22:30:26.17 |
-48:30:17.3 |
HIP 111027 |
8.91 |
| 2026-06-04 12:00 |
22:30:25.22 |
-48:31:06.8 |
HIP 111027 |
8.65 |
| 2026-06-05 00:00 |
22:30:24.22 |
-48:31:56.3 |
HIP 111027 |
8.45 |
| 2026-06-05 12:00 |
22:30:23.17 |
-48:32:46.0 |
HIP 111027 |
8.33 |
| 2026-06-06 00:00 |
22:30:22.07 |
-48:33:35.9 |
HIP 111027 |
8.29 |
| 2026-06-06 12:00 |
22:30:20.91 |
-48:34:25.8 |
HIP 111027 |
8.32 |
| 2026-06-07 00:00 |
22:30:19.70 |
-48:35:15.8 |
HIP 111027 |
8.44 |
| 2026-06-07 12:00 |
22:30:18.45 |
-48:36:06.0 |
HIP 111027 |
8.63 |
| 2026-06-08 00:00 |
22:30:17.13 |
-48:36:56.3 |
HIP 111027 |
8.90 |
| 2026-06-08 12:00 |
22:30:15.77 |
-48:37:46.6 |
HIP 111027 |
9.24 |
| 2026-06-09 00:00 |
22:30:14.35 |
-48:38:37.1 |
HIP 111027 |
9.63 |
| 2026-06-09 12:00 |
22:30:12.89 |
-48:39:27.7 |
HIP 111027 |
10.09 |
| 2026-06-10 00:00 |
22:30:11.37 |
-48:40:18.3 |
HIP 111027 |
10.59 |
| 2026-06-10 12:00 |
22:30:09.80 |
-48:41:09.1 |
HIP 111027 |
11.14 |
| 2026-06-11 00:00 |
22:30:08.17 |
-48:41:59.9 |
HIP 111027 |
11.72 |
| 2026-06-11 12:00 |
22:30:06.50 |
-48:42:50.8 |
HIP 111027 |
12.34 |
| 2026-06-12 00:00 |
22:30:04.77 |
-48:43:41.8 |
HIP 111027 |
12.99 |
| 2026-06-12 12:00 |
22:30:02.99 |
-48:44:32.9 |
HIP 111027 |
13.66 |
| 2026-06-13 00:00 |
22:30:01.16 |
-48:45:24.0 |
HIP 111027 |
14.36 |
| 2026-06-13 12:00 |
22:29:59.28 |
-48:46:15.2 |
HIP 111027 |
15.08 |
| 2026-06-14 00:00 |
22:29:57.34 |
-48:47:06.5 |
HIP 111027 |
15.82 |
| 2026-06-14 12:00 |
22:29:55.35 |
-48:47:57.8 |
HIP 111027 |
16.57 |
| 2026-06-15 00:00 |
22:29:53.31 |
-48:48:49.2 |
HIP 111027 |
17.34 |
| 2026-06-15 12:00 |
22:29:51.22 |
-48:49:40.7 |
HIP 111027 |
18.12 |
| 2026-06-16 00:00 |
22:29:49.08 |
-48:50:32.2 |
HIP 111027 |
18.92 |
| 2026-06-16 12:00 |
22:29:46.89 |
-48:51:23.7 |
HIP 111027 |
19.72 |
| 2026-06-17 00:00 |
22:29:44.64 |
-48:52:15.3 |
HIP 111027 |
20.54 |
| 2026-06-17 12:00 |
22:29:42.35 |
-48:53:06.9 |
HIP 111027 |
21.36 |
| 2026-06-18 00:00 |
22:29:40.00 |
-48:53:58.6 |
HIP 111027 |
22.20 |
| 2026-06-18 12:00 |
22:29:37.61 |
-48:54:50.2 |
HIP 110952 |
22.67 |
| 2026-06-19 00:00 |
22:29:35.16 |
-48:55:42.0 |
HIP 110952 |
21.72 |
| 2026-06-19 12:00 |
22:29:32.66 |
-48:56:33.7 |
HIP 110952 |
20.77 |
| 2026-06-20 00:00 |
22:29:30.11 |
-48:57:25.4 |
HIP 110952 |
19.81 |
| 2026-06-20 12:00 |
22:29:27.51 |
-48:58:17.2 |
HIP 110952 |
18.85 |
| 2026-06-21 00:00 |
22:29:24.86 |
-48:59:09.0 |
HIP 110952 |
17.89 |
| 2026-06-21 12:00 |
22:29:22.16 |
-49:00:00.8 |
HIP 110952 |
16.93 |
| 2026-06-22 00:00 |
22:29:19.41 |
-49:00:52.6 |
HIP 110952 |
15.97 |