メタデータ
| 項目 |
値 |
| Designation |
C/2012 L1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-12-25T09:55:40.889280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:10Z |
| Obs used |
1489 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
8.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-11-20.0000000 |
| e |
0.99705290 |
| q (au) |
2.262410 |
| a (au) |
767.674452 |
| i (deg) |
87.219166 |
| Ω (om, deg) |
271.766875 |
| ω (w, deg) |
140.289327 |
| M (ma, deg) |
359.998359 |
等級
散乱 + 全体線形
$$
M_a = (12.971 + 4.294\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.971 |
| n |
4.294 |
| gf |
1.000 |
| gb |
-0.847 |
| k |
0.800 |
| 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 |
| 2012-06-01 |
2012-09-11 |
+7.1051 |
-3.451 |
| 2012-09-11 |
2012-12-24 |
-1.1140 |
-0.355 |
| 2012-12-26 |
2013-07-08 |
+4.6516 |
-1.625 |
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) |
| 2026-09-20 00:00 |
08:38:06.25 |
-83:47:30.4 |
HIP 41528 |
23.78 |
| 2026-09-20 12:00 |
08:38:29.86 |
-83:48:16.6 |
HIP 41528 |
23.62 |
| 2026-09-21 00:00 |
08:38:53.33 |
-83:49:03.1 |
HIP 41528 |
23.49 |
| 2026-09-21 12:00 |
08:39:16.66 |
-83:49:49.8 |
HIP 41528 |
23.40 |
| 2026-09-22 00:00 |
08:39:39.84 |
-83:50:36.8 |
HIP 41528 |
23.34 |
| 2026-09-22 12:00 |
08:40:02.88 |
-83:51:24.0 |
HIP 41528 |
23.32 |
| 2026-09-23 00:00 |
08:40:25.77 |
-83:52:11.4 |
HIP 41528 |
23.33 |
| 2026-09-23 12:00 |
08:40:48.51 |
-83:52:59.1 |
HIP 41528 |
23.37 |
| 2026-09-24 00:00 |
08:41:11.10 |
-83:53:47.1 |
HIP 41528 |
23.45 |
| 2026-09-24 12:00 |
08:41:33.54 |
-83:54:35.3 |
HIP 41528 |
23.56 |
| 2026-09-25 00:00 |
08:41:55.83 |
-83:55:23.7 |
HIP 41528 |
23.71 |
| 2026-09-25 12:00 |
08:42:17.96 |
-83:56:12.4 |
HIP 41528 |
23.89 |
| 2026-09-26 00:00 |
08:42:39.93 |
-83:57:01.4 |
HIP 41528 |
24.10 |
| 2026-09-26 12:00 |
08:43:01.74 |
-83:57:50.5 |
HIP 41528 |
24.34 |
| 2026-09-27 00:00 |
08:43:23.40 |
-83:58:39.9 |
HIP 41528 |
24.62 |
| 2026-09-27 12:00 |
08:43:44.89 |
-83:59:29.6 |
HIP 41528 |
24.92 |
| 2026-09-28 00:00 |
08:44:06.22 |
-84:00:19.4 |
HIP 41528 |
25.25 |
| 2026-09-28 12:00 |
08:44:27.39 |
-84:01:09.5 |
HIP 41528 |
25.61 |
| 2026-09-29 00:00 |
08:44:48.39 |
-84:01:59.8 |
HIP 41528 |
25.99 |
| 2026-09-29 12:00 |
08:45:09.22 |
-84:02:50.4 |
HIP 41528 |
26.40 |
| 2026-09-30 00:00 |
08:45:29.88 |
-84:03:41.2 |
HIP 41528 |
26.83 |
| 2026-09-30 12:00 |
08:45:50.36 |
-84:04:32.2 |
HIP 41528 |
27.29 |
| 2026-10-01 00:00 |
08:46:10.68 |
-84:05:23.4 |
HIP 41528 |
27.76 |
| 2026-10-01 12:00 |
08:46:30.81 |
-84:06:14.9 |
HIP 41528 |
28.26 |
| 2026-10-02 00:00 |
08:46:50.77 |
-84:07:06.6 |
HIP 41528 |
28.78 |
| 2026-10-02 12:00 |
08:47:10.55 |
-84:07:58.4 |
HIP 41528 |
29.31 |
| 2026-10-03 00:00 |
08:47:30.15 |
-84:08:50.6 |
HIP 41528 |
29.86 |
| 2026-10-03 12:00 |
08:47:49.56 |
-84:09:42.9 |
HIP 41528 |
30.43 |
| 2026-10-04 00:00 |
08:48:08.78 |
-84:10:35.4 |
HIP 41528 |
31.02 |
| 2026-10-04 12:00 |
08:48:27.81 |
-84:11:28.2 |
HIP 41528 |
31.61 |
| 2026-10-05 00:00 |
08:48:46.65 |
-84:12:21.1 |
HIP 41528 |
32.23 |
| 2026-10-05 12:00 |
08:49:05.30 |
-84:13:14.3 |
HIP 41528 |
32.85 |
| 2026-10-06 00:00 |
08:49:23.75 |
-84:14:07.7 |
HIP 41528 |
33.49 |
| 2026-10-06 12:00 |
08:49:42.01 |
-84:15:01.3 |
HIP 41528 |
34.13 |
| 2026-10-07 00:00 |
08:50:00.06 |
-84:15:55.0 |
HIP 41528 |
34.79 |
| 2026-10-07 12:00 |
08:50:17.91 |
-84:16:49.0 |
HIP 41528 |
35.46 |
| 2026-10-08 00:00 |
08:50:35.55 |
-84:17:43.2 |
HIP 41528 |
36.14 |
| 2026-10-08 12:00 |
08:50:52.98 |
-84:18:37.6 |
HIP 41796 |
35.98 |
| 2026-10-09 00:00 |
08:51:10.20 |
-84:19:32.1 |
HIP 41796 |
35.72 |
| 2026-10-09 12:00 |
08:51:27.21 |
-84:20:26.9 |
HIP 41796 |
35.47 |
| 2026-10-10 00:00 |
08:51:44.00 |
-84:21:21.8 |
HIP 41796 |
35.24 |
| 2026-10-10 12:00 |
08:52:00.58 |
-84:22:16.9 |
HIP 41796 |
35.04 |
| 2026-10-11 00:00 |
08:52:16.93 |
-84:23:12.2 |
HIP 41796 |
34.85 |