メタデータ
| 項目 |
値 |
| Designation |
C/2007 K1 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-07T15:34:22.368000Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:31Z |
| Obs used |
141 |
| NEO |
- |
| M1 |
11.000 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-06-26.0000000 |
| e |
0.97872535 |
| q (au) |
9.239049 |
| a (au) |
434.274942 |
| i (deg) |
108.433102 |
| Ω (om, deg) |
294.661115 |
| ω (w, deg) |
51.970917 |
| M (ma, deg) |
0.005375 |
等級
散乱 + 全体線形
$$
M_a = (9.944 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.944 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
08:16:18.59 |
+29:51:50.2 |
HIP 40484 |
13.87 |
| 2026-09-20 12:00 |
08:16:20.49 |
+29:51:45.7 |
HIP 40484 |
13.93 |
| 2026-09-21 00:00 |
08:16:22.35 |
+29:51:41.4 |
HIP 40484 |
14.00 |
| 2026-09-21 12:00 |
08:16:24.19 |
+29:51:37.3 |
HIP 40484 |
14.09 |
| 2026-09-22 00:00 |
08:16:26.00 |
+29:51:33.2 |
HIP 40484 |
14.19 |
| 2026-09-22 12:00 |
08:16:27.79 |
+29:51:29.3 |
HIP 40484 |
14.29 |
| 2026-09-23 00:00 |
08:16:29.54 |
+29:51:25.5 |
HIP 40484 |
14.41 |
| 2026-09-23 12:00 |
08:16:31.27 |
+29:51:21.8 |
HIP 40484 |
14.53 |
| 2026-09-24 00:00 |
08:16:32.97 |
+29:51:18.2 |
HIP 40484 |
14.66 |
| 2026-09-24 12:00 |
08:16:34.64 |
+29:51:14.8 |
HIP 40484 |
14.80 |
| 2026-09-25 00:00 |
08:16:36.29 |
+29:51:11.5 |
HIP 40484 |
14.94 |
| 2026-09-25 12:00 |
08:16:37.90 |
+29:51:08.3 |
HIP 40484 |
15.09 |
| 2026-09-26 00:00 |
08:16:39.49 |
+29:51:05.2 |
HIP 40484 |
15.25 |
| 2026-09-26 12:00 |
08:16:41.05 |
+29:51:02.2 |
HIP 40484 |
15.41 |
| 2026-09-27 00:00 |
08:16:42.58 |
+29:50:59.4 |
HIP 40484 |
15.57 |
| 2026-09-27 12:00 |
08:16:44.08 |
+29:50:56.7 |
HIP 40484 |
15.73 |
| 2026-09-28 00:00 |
08:16:45.55 |
+29:50:54.1 |
HIP 40484 |
15.90 |
| 2026-09-28 12:00 |
08:16:46.99 |
+29:50:51.6 |
HIP 40484 |
16.07 |
| 2026-09-29 00:00 |
08:16:48.40 |
+29:50:49.3 |
HIP 40484 |
16.24 |
| 2026-09-29 12:00 |
08:16:49.78 |
+29:50:47.1 |
HIP 40484 |
16.42 |
| 2026-09-30 00:00 |
08:16:51.14 |
+29:50:45.0 |
HIP 40484 |
16.59 |
| 2026-09-30 12:00 |
08:16:52.46 |
+29:50:43.0 |
HIP 40484 |
16.76 |
| 2026-10-01 00:00 |
08:16:53.75 |
+29:50:41.1 |
HIP 40484 |
16.94 |
| 2026-10-01 12:00 |
08:16:55.02 |
+29:50:39.4 |
HIP 40484 |
17.11 |
| 2026-10-02 00:00 |
08:16:56.25 |
+29:50:37.8 |
HIP 40484 |
17.29 |
| 2026-10-02 12:00 |
08:16:57.45 |
+29:50:36.3 |
HIP 40484 |
17.46 |
| 2026-10-03 00:00 |
08:16:58.62 |
+29:50:34.9 |
HIP 40484 |
17.63 |
| 2026-10-03 12:00 |
08:16:59.76 |
+29:50:33.7 |
HIP 40484 |
17.80 |
| 2026-10-04 00:00 |
08:17:00.87 |
+29:50:32.5 |
HIP 40484 |
17.96 |
| 2026-10-04 12:00 |
08:17:01.95 |
+29:50:31.5 |
HIP 40484 |
18.13 |
| 2026-10-05 00:00 |
08:17:03.00 |
+29:50:30.6 |
HIP 40484 |
18.29 |
| 2026-10-05 12:00 |
08:17:04.02 |
+29:50:29.9 |
HIP 40484 |
18.45 |
| 2026-10-06 00:00 |
08:17:05.00 |
+29:50:29.2 |
HIP 40484 |
18.61 |
| 2026-10-06 12:00 |
08:17:05.95 |
+29:50:28.7 |
HIP 40484 |
18.76 |
| 2026-10-07 00:00 |
08:17:06.88 |
+29:50:28.3 |
HIP 40484 |
18.92 |
| 2026-10-07 12:00 |
08:17:07.76 |
+29:50:28.0 |
HIP 40484 |
19.06 |
| 2026-10-08 00:00 |
08:17:08.62 |
+29:50:27.9 |
HIP 40484 |
19.21 |
| 2026-10-08 12:00 |
08:17:09.45 |
+29:50:27.8 |
HIP 40484 |
19.35 |
| 2026-10-09 00:00 |
08:17:10.24 |
+29:50:27.9 |
HIP 40484 |
19.49 |
| 2026-10-09 12:00 |
08:17:11.00 |
+29:50:28.1 |
HIP 40484 |
19.62 |
| 2026-10-10 00:00 |
08:17:11.73 |
+29:50:28.4 |
HIP 40484 |
19.75 |
| 2026-10-10 12:00 |
08:17:12.42 |
+29:50:28.8 |
HIP 40484 |
19.88 |
| 2026-10-11 00:00 |
08:17:13.08 |
+29:50:29.4 |
HIP 40484 |
20.00 |