メタデータ
| 項目 |
値 |
| Designation |
C/2013 G6 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-07-25T05:28:45.828480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:34Z |
| Obs used |
230 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
27.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-06-18.0000000 |
| e |
0.99470498 |
| q (au) |
2.048499 |
| a (au) |
386.872597 |
| i (deg) |
124.084326 |
| Ω (om, deg) |
44.567402 |
| ω (w, deg) |
215.692475 |
| M (ma, deg) |
359.995178 |
等級
散乱 + 全体線形
$$
M_a = (13.902 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.902 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.985 |
| 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 |
| 2013-04-13 |
2013-07-08 |
+39.8436 |
-14.073 |
| 2013-08-03 |
2014-02-05 |
+22.5987 |
-10.706 |
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 |
02:32:38.42 |
+19:24:36.4 |
HIP 11760 |
14.82 |
| 2026-05-12 12:00 |
02:32:42.10 |
+19:24:58.0 |
HIP 11855 |
15.59 |
| 2026-05-13 00:00 |
02:32:45.78 |
+19:25:19.6 |
HIP 11855 |
15.72 |
| 2026-05-13 12:00 |
02:32:49.45 |
+19:25:41.2 |
HIP 11855 |
15.91 |
| 2026-05-14 00:00 |
02:32:53.11 |
+19:26:02.8 |
HIP 11855 |
16.15 |
| 2026-05-14 12:00 |
02:32:56.77 |
+19:26:24.5 |
HIP 11855 |
16.44 |
| 2026-05-15 00:00 |
02:33:00.42 |
+19:26:46.1 |
HIP 11855 |
16.78 |
| 2026-05-15 12:00 |
02:33:04.06 |
+19:27:07.7 |
HIP 11855 |
17.16 |
| 2026-05-16 00:00 |
02:33:07.70 |
+19:27:29.3 |
HIP 11855 |
17.58 |
| 2026-05-16 12:00 |
02:33:11.32 |
+19:27:50.9 |
HIP 11855 |
18.04 |
| 2026-05-17 00:00 |
02:33:14.94 |
+19:28:12.5 |
HIP 11855 |
18.54 |
| 2026-05-17 12:00 |
02:33:18.55 |
+19:28:34.1 |
HIP 11855 |
19.06 |
| 2026-05-18 00:00 |
02:33:22.15 |
+19:28:55.7 |
HIP 11855 |
19.62 |
| 2026-05-18 12:00 |
02:33:25.74 |
+19:29:17.3 |
HIP 11855 |
20.20 |
| 2026-05-19 00:00 |
02:33:29.32 |
+19:29:38.8 |
HIP 11855 |
20.80 |
| 2026-05-19 12:00 |
02:33:32.90 |
+19:30:00.4 |
HIP 11855 |
21.43 |
| 2026-05-20 00:00 |
02:33:36.46 |
+19:30:21.9 |
HIP 11855 |
22.08 |
| 2026-05-20 12:00 |
02:33:40.01 |
+19:30:43.4 |
HIP 11855 |
22.74 |
| 2026-05-21 00:00 |
02:33:43.55 |
+19:31:04.9 |
HIP 11855 |
23.42 |
| 2026-05-21 12:00 |
02:33:47.08 |
+19:31:26.4 |
HIP 11855 |
24.11 |
| 2026-05-22 00:00 |
02:33:50.60 |
+19:31:47.9 |
HIP 11855 |
24.81 |
| 2026-05-22 12:00 |
02:33:54.11 |
+19:32:09.3 |
HIP 11855 |
25.53 |
| 2026-05-23 00:00 |
02:33:57.61 |
+19:32:30.7 |
HIP 11855 |
26.25 |
| 2026-05-23 12:00 |
02:34:01.09 |
+19:32:52.1 |
HIP 11968 |
26.74 |
| 2026-05-24 00:00 |
02:34:04.57 |
+19:33:13.5 |
HIP 11968 |
26.24 |
| 2026-05-24 12:00 |
02:34:08.03 |
+19:33:34.8 |
HIP 11968 |
25.76 |
| 2026-05-25 00:00 |
02:34:11.48 |
+19:33:56.1 |
HIP 11968 |
25.31 |
| 2026-05-25 12:00 |
02:34:14.91 |
+19:34:17.4 |
HIP 11968 |
24.88 |
| 2026-05-26 00:00 |
02:34:18.34 |
+19:34:38.7 |
HIP 11968 |
24.47 |
| 2026-05-26 12:00 |
02:34:21.75 |
+19:35:00.0 |
HIP 11968 |
24.09 |
| 2026-05-27 00:00 |
02:34:25.14 |
+19:35:21.1 |
HIP 11968 |
23.74 |
| 2026-05-27 12:00 |
02:34:28.53 |
+19:35:42.3 |
HIP 11968 |
23.41 |
| 2026-05-28 00:00 |
02:34:31.90 |
+19:36:03.5 |
HIP 11968 |
23.11 |
| 2026-05-28 12:00 |
02:34:35.25 |
+19:36:24.6 |
HIP 11968 |
22.85 |
| 2026-05-29 00:00 |
02:34:38.59 |
+19:36:45.6 |
HIP 11968 |
22.61 |
| 2026-05-29 12:00 |
02:34:41.92 |
+19:37:06.7 |
HIP 11968 |
22.40 |
| 2026-05-30 00:00 |
02:34:45.23 |
+19:37:27.7 |
HIP 11968 |
22.22 |
| 2026-05-30 12:00 |
02:34:48.53 |
+19:37:48.6 |
HIP 11968 |
22.08 |
| 2026-05-31 00:00 |
02:34:51.81 |
+19:38:09.6 |
HIP 11968 |
21.96 |
| 2026-05-31 12:00 |
02:34:55.08 |
+19:38:30.4 |
HIP 11968 |
21.88 |
| 2026-06-01 00:00 |
02:34:58.33 |
+19:38:51.3 |
HIP 11968 |
21.83 |
| 2026-06-01 12:00 |
02:35:01.57 |
+19:39:12.1 |
HIP 11968 |
21.81 |
| 2026-06-02 00:00 |
02:35:04.79 |
+19:39:32.9 |
HIP 11968 |
21.82 |