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) |
| 2026-06-01 00:00 |
08:04:53.32 |
+30:46:22.6 |
HIP 39459 |
17.25 |
| 2026-06-01 12:00 |
08:04:55.66 |
+30:46:02.6 |
HIP 39459 |
17.39 |
| 2026-06-02 00:00 |
08:04:58.01 |
+30:45:42.7 |
HIP 39459 |
17.55 |
| 2026-06-02 12:00 |
08:05:00.39 |
+30:45:22.7 |
HIP 39459 |
17.74 |
| 2026-06-03 00:00 |
08:05:02.80 |
+30:45:02.7 |
HIP 39459 |
17.94 |
| 2026-06-03 12:00 |
08:05:05.22 |
+30:44:42.7 |
HIP 39459 |
18.18 |
| 2026-06-04 00:00 |
08:05:07.67 |
+30:44:22.7 |
HIP 39459 |
18.43 |
| 2026-06-04 12:00 |
08:05:10.14 |
+30:44:02.7 |
HIP 39459 |
18.70 |
| 2026-06-05 00:00 |
08:05:12.64 |
+30:43:42.7 |
HIP 39459 |
19.00 |
| 2026-06-05 12:00 |
08:05:15.15 |
+30:43:22.7 |
HIP 39459 |
19.32 |
| 2026-06-06 00:00 |
08:05:17.69 |
+30:43:02.7 |
HIP 39459 |
19.65 |
| 2026-06-06 12:00 |
08:05:20.25 |
+30:42:42.7 |
HIP 39459 |
20.01 |
| 2026-06-07 00:00 |
08:05:22.84 |
+30:42:22.7 |
HIP 39459 |
20.38 |
| 2026-06-07 12:00 |
08:05:25.44 |
+30:42:02.7 |
HIP 39459 |
20.77 |
| 2026-06-08 00:00 |
08:05:28.07 |
+30:41:42.7 |
HIP 39459 |
21.18 |
| 2026-06-08 12:00 |
08:05:30.71 |
+30:41:22.7 |
HIP 39459 |
21.61 |
| 2026-06-09 00:00 |
08:05:33.38 |
+30:41:02.7 |
HIP 39459 |
22.05 |
| 2026-06-09 12:00 |
08:05:36.07 |
+30:40:42.8 |
HIP 39459 |
22.50 |
| 2026-06-10 00:00 |
08:05:38.78 |
+30:40:22.8 |
HIP 39459 |
22.97 |
| 2026-06-10 12:00 |
08:05:41.51 |
+30:40:02.8 |
HIP 39459 |
23.46 |
| 2026-06-11 00:00 |
08:05:44.26 |
+30:39:42.8 |
HIP 39459 |
23.96 |
| 2026-06-11 12:00 |
08:05:47.03 |
+30:39:22.9 |
HIP 39459 |
24.47 |
| 2026-06-12 00:00 |
08:05:49.82 |
+30:39:02.9 |
HIP 39459 |
24.99 |
| 2026-06-12 12:00 |
08:05:52.62 |
+30:38:43.0 |
HIP 39459 |
25.53 |
| 2026-06-13 00:00 |
08:05:55.45 |
+30:38:23.0 |
HIP 39459 |
26.08 |
| 2026-06-13 12:00 |
08:05:58.30 |
+30:38:03.1 |
HIP 39459 |
26.64 |
| 2026-06-14 00:00 |
08:06:01.17 |
+30:37:43.2 |
HIP 39792 |
26.40 |
| 2026-06-14 12:00 |
08:06:04.05 |
+30:37:23.3 |
HIP 39792 |
25.69 |
| 2026-06-15 00:00 |
08:06:06.95 |
+30:37:03.4 |
HIP 39792 |
24.99 |
| 2026-06-15 12:00 |
08:06:09.87 |
+30:36:43.5 |
HIP 39792 |
24.28 |
| 2026-06-16 00:00 |
08:06:12.81 |
+30:36:23.7 |
HIP 39792 |
23.57 |
| 2026-06-16 12:00 |
08:06:15.77 |
+30:36:03.9 |
HIP 39792 |
22.85 |
| 2026-06-17 00:00 |
08:06:18.74 |
+30:35:44.0 |
HIP 39792 |
22.13 |
| 2026-06-17 12:00 |
08:06:21.73 |
+30:35:24.2 |
HIP 39792 |
21.41 |
| 2026-06-18 00:00 |
08:06:24.74 |
+30:35:04.5 |
HIP 39792 |
20.68 |
| 2026-06-18 12:00 |
08:06:27.76 |
+30:34:44.7 |
HIP 39792 |
19.95 |
| 2026-06-19 00:00 |
08:06:30.81 |
+30:34:24.9 |
HIP 39792 |
19.22 |
| 2026-06-19 12:00 |
08:06:33.86 |
+30:34:05.2 |
HIP 39792 |
18.48 |
| 2026-06-20 00:00 |
08:06:36.93 |
+30:33:45.5 |
HIP 39792 |
17.74 |
| 2026-06-20 12:00 |
08:06:40.02 |
+30:33:25.9 |
HIP 39792 |
17.00 |
| 2026-06-21 00:00 |
08:06:43.13 |
+30:33:06.2 |
HIP 39792 |
16.26 |
| 2026-06-21 12:00 |
08:06:46.24 |
+30:32:46.6 |
HIP 39792 |
15.51 |
| 2026-06-22 00:00 |
08:06:49.38 |
+30:32:27.0 |
HIP 39792 |
14.76 |