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) |
| 2026-05-12 00:00 |
22:30:14.24 |
-47:55:28.1 |
HIP 111107 |
3.53 |
| 2026-05-12 12:00 |
22:30:15.63 |
-47:56:08.7 |
HIP 111107 |
2.96 |
| 2026-05-13 00:00 |
22:30:16.98 |
-47:56:49.5 |
HIP 111107 |
2.46 |
| 2026-05-13 12:00 |
22:30:18.27 |
-47:57:30.5 |
HIP 111107 |
2.11 |
| 2026-05-14 00:00 |
22:30:19.52 |
-47:58:11.9 |
HIP 111107 |
1.98 |
| 2026-05-14 12:00 |
22:30:20.71 |
-47:58:53.4 |
HIP 111107 |
2.10 |
| 2026-05-15 00:00 |
22:30:21.86 |
-47:59:35.3 |
HIP 111107 |
2.46 |
| 2026-05-15 12:00 |
22:30:22.96 |
-48:00:17.3 |
HIP 111107 |
2.95 |
| 2026-05-16 00:00 |
22:30:24.01 |
-48:00:59.6 |
HIP 111107 |
3.54 |
| 2026-05-16 12:00 |
22:30:25.00 |
-48:01:42.2 |
HIP 111107 |
4.17 |
| 2026-05-17 00:00 |
22:30:25.95 |
-48:02:24.9 |
HIP 111107 |
4.84 |
| 2026-05-17 12:00 |
22:30:26.85 |
-48:03:07.9 |
HIP 111107 |
5.53 |
| 2026-05-18 00:00 |
22:30:27.70 |
-48:03:51.2 |
HIP 111107 |
6.23 |
| 2026-05-18 12:00 |
22:30:28.50 |
-48:04:34.6 |
HIP 111107 |
6.94 |
| 2026-05-19 00:00 |
22:30:29.24 |
-48:05:18.3 |
HIP 111107 |
7.66 |
| 2026-05-19 12:00 |
22:30:29.94 |
-48:06:02.3 |
HIP 111107 |
8.39 |
| 2026-05-20 00:00 |
22:30:30.59 |
-48:06:46.4 |
HIP 111107 |
9.13 |
| 2026-05-20 12:00 |
22:30:31.18 |
-48:07:30.7 |
HIP 111107 |
9.87 |
| 2026-05-21 00:00 |
22:30:31.73 |
-48:08:15.3 |
HIP 111107 |
10.61 |
| 2026-05-21 12:00 |
22:30:32.22 |
-48:09:00.0 |
HIP 111142 |
10.88 |
| 2026-05-22 00:00 |
22:30:32.66 |
-48:09:45.0 |
HIP 111142 |
10.17 |
| 2026-05-22 12:00 |
22:30:33.05 |
-48:10:30.2 |
HIP 111142 |
9.47 |
| 2026-05-23 00:00 |
22:30:33.40 |
-48:11:15.6 |
HIP 111142 |
8.77 |
| 2026-05-23 12:00 |
22:30:33.69 |
-48:12:01.2 |
HIP 111142 |
8.09 |
| 2026-05-24 00:00 |
22:30:33.92 |
-48:12:46.9 |
HIP 111142 |
7.43 |
| 2026-05-24 12:00 |
22:30:34.11 |
-48:13:32.9 |
HIP 111142 |
6.78 |
| 2026-05-25 00:00 |
22:30:34.25 |
-48:14:19.0 |
HIP 111142 |
6.17 |
| 2026-05-25 12:00 |
22:30:34.33 |
-48:15:05.4 |
HIP 111142 |
5.61 |
| 2026-05-26 00:00 |
22:30:34.37 |
-48:15:51.9 |
HIP 111142 |
5.10 |
| 2026-05-26 12:00 |
22:30:34.35 |
-48:16:38.6 |
HIP 111142 |
4.68 |
| 2026-05-27 00:00 |
22:30:34.28 |
-48:17:25.5 |
HIP 111142 |
4.36 |
| 2026-05-27 12:00 |
22:30:34.16 |
-48:18:12.5 |
HIP 111142 |
4.17 |
| 2026-05-28 00:00 |
22:30:33.99 |
-48:18:59.7 |
HIP 111142 |
4.13 |
| 2026-05-28 12:00 |
22:30:33.77 |
-48:19:47.1 |
HIP 111142 |
4.25 |
| 2026-05-29 00:00 |
22:30:33.49 |
-48:20:34.7 |
HIP 111142 |
4.52 |
| 2026-05-29 12:00 |
22:30:33.17 |
-48:21:22.4 |
HIP 111142 |
4.91 |
| 2026-05-30 00:00 |
22:30:32.79 |
-48:22:10.3 |
HIP 111142 |
5.40 |
| 2026-05-30 12:00 |
22:30:32.36 |
-48:22:58.3 |
HIP 111142 |
5.97 |
| 2026-05-31 00:00 |
22:30:31.88 |
-48:23:46.5 |
HIP 111142 |
6.59 |
| 2026-05-31 12:00 |
22:30:31.35 |
-48:24:34.9 |
HIP 111142 |
7.26 |
| 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 |