メタデータ
| 項目 |
値 |
| Designation |
C/2012 L3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-06-12T05:16:49.045440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:16Z |
| Obs used |
255 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
15.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-07-18.0000000 |
| e |
0.99079164 |
| q (au) |
3.045029 |
| a (au) |
330.681042 |
| i (deg) |
134.196647 |
| Ω (om, deg) |
53.489782 |
| ω (w, deg) |
107.093418 |
| M (ma, deg) |
0.005864 |
等級
散乱 + 全体線形
$$
M_a = (10.623 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.623 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.692 |
| 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 |
| 2012-06-12 |
2013-05-08 |
+8.7931 |
-4.384 |
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 |
10:05:12.53 |
-35:47:56.4 |
HIP 49451 |
7.03 |
| 2026-03-26 12:00 |
10:05:08.20 |
-35:47:16.7 |
HIP 49451 |
7.93 |
| 2026-03-27 00:00 |
10:05:03.90 |
-35:46:36.8 |
HIP 49451 |
8.87 |
| 2026-03-27 12:00 |
10:04:59.63 |
-35:45:56.6 |
HIP 49451 |
9.83 |
| 2026-03-28 00:00 |
10:04:55.38 |
-35:45:16.2 |
HIP 49451 |
10.82 |
| 2026-03-28 12:00 |
10:04:51.16 |
-35:44:35.6 |
HIP 49451 |
11.82 |
| 2026-03-29 00:00 |
10:04:46.97 |
-35:43:54.8 |
HIP 49451 |
12.83 |
| 2026-03-29 12:00 |
10:04:42.81 |
-35:43:13.7 |
HIP 49451 |
13.85 |
| 2026-03-30 00:00 |
10:04:38.67 |
-35:42:32.4 |
HIP 49451 |
14.87 |
| 2026-03-30 12:00 |
10:04:34.57 |
-35:41:50.9 |
HIP 49451 |
15.90 |
| 2026-03-31 00:00 |
10:04:30.49 |
-35:41:09.2 |
HIP 49451 |
16.94 |
| 2026-03-31 12:00 |
10:04:26.45 |
-35:40:27.2 |
HIP 49451 |
17.97 |
| 2026-04-01 00:00 |
10:04:22.43 |
-35:39:45.1 |
HIP 49451 |
19.00 |
| 2026-04-01 12:00 |
10:04:18.44 |
-35:39:02.7 |
HIP 49451 |
20.04 |
| 2026-04-02 00:00 |
10:04:14.49 |
-35:38:20.2 |
HIP 49451 |
21.08 |
| 2026-04-02 12:00 |
10:04:10.56 |
-35:37:37.5 |
HIP 49451 |
22.11 |
| 2026-04-03 00:00 |
10:04:06.66 |
-35:36:54.5 |
HIP 49451 |
23.15 |
| 2026-04-03 12:00 |
10:04:02.80 |
-35:36:11.4 |
HIP 49451 |
24.18 |
| 2026-04-04 00:00 |
10:03:58.96 |
-35:35:28.1 |
HIP 49451 |
25.21 |
| 2026-04-04 12:00 |
10:03:55.16 |
-35:34:44.6 |
HIP 49451 |
26.24 |
| 2026-04-05 00:00 |
10:03:51.39 |
-35:34:00.9 |
HIP 49451 |
27.27 |
| 2026-04-05 12:00 |
10:03:47.64 |
-35:33:17.1 |
HIP 49384 |
27.91 |
| 2026-04-06 00:00 |
10:03:43.94 |
-35:32:33.0 |
HIP 49384 |
27.67 |
| 2026-04-06 12:00 |
10:03:40.26 |
-35:31:48.8 |
HIP 49384 |
27.46 |
| 2026-04-07 00:00 |
10:03:36.62 |
-35:31:04.5 |
HIP 49384 |
27.28 |
| 2026-04-07 12:00 |
10:03:33.00 |
-35:30:20.0 |
HIP 49384 |
27.14 |
| 2026-04-08 00:00 |
10:03:29.42 |
-35:29:35.3 |
HIP 49384 |
27.03 |
| 2026-04-08 12:00 |
10:03:25.88 |
-35:28:50.5 |
HIP 49384 |
26.96 |
| 2026-04-09 00:00 |
10:03:22.37 |
-35:28:05.5 |
HIP 49384 |
26.91 |
| 2026-04-09 12:00 |
10:03:18.89 |
-35:27:20.3 |
HIP 49384 |
26.90 |
| 2026-04-10 00:00 |
10:03:15.44 |
-35:26:35.1 |
HIP 49384 |
26.93 |
| 2026-04-10 12:00 |
10:03:12.03 |
-35:25:49.7 |
HIP 49384 |
26.99 |
| 2026-04-11 00:00 |
10:03:08.65 |
-35:25:04.1 |
HIP 49384 |
27.07 |
| 2026-04-11 12:00 |
10:03:05.31 |
-35:24:18.4 |
HIP 49384 |
27.19 |
| 2026-04-12 00:00 |
10:03:02.00 |
-35:23:32.6 |
HIP 49384 |
27.35 |
| 2026-04-12 12:00 |
10:02:58.73 |
-35:22:46.7 |
HIP 49384 |
27.53 |
| 2026-04-13 00:00 |
10:02:55.49 |
-35:22:00.6 |
HIP 49384 |
27.74 |
| 2026-04-13 12:00 |
10:02:52.28 |
-35:21:14.4 |
HIP 49384 |
27.98 |
| 2026-04-14 00:00 |
10:02:49.12 |
-35:20:28.2 |
HIP 49384 |
28.24 |
| 2026-04-14 12:00 |
10:02:45.98 |
-35:19:41.8 |
HIP 49384 |
28.53 |
| 2026-04-15 00:00 |
10:02:42.89 |
-35:18:55.3 |
HIP 49384 |
28.85 |
| 2026-04-15 12:00 |
10:02:39.82 |
-35:18:08.6 |
HIP 49384 |
29.19 |
| 2026-04-16 00:00 |
10:02:36.80 |
-35:17:21.9 |
HIP 49032 |
29.24 |