C/2007 K5 (Lovejoy)
メタデータ
| 項目 |
値 |
| Designation |
C/2007 K5 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-01T23:02:06.720000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:09Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-06-15.0000000 |
| e |
0.97669348 |
| q (au) |
1.149171 |
| a (au) |
49.306854 |
| i (deg) |
64.883215 |
| Ω (om, deg) |
193.738734 |
| ω (w, deg) |
255.585000 |
| M (ma, deg) |
0.125370 |
等級
散乱 + 全体線形
$$
M_a = (13.220 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.220 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-02-03 00:00 |
16:10:11.46 |
+30:51:58.7 |
HIP 79266 |
8.67 |
| 2026-02-03 12:00 |
16:10:12.98 |
+30:52:35.3 |
HIP 79266 |
8.00 |
| 2026-02-04 00:00 |
16:10:14.47 |
+30:53:12.0 |
HIP 79266 |
7.34 |
| 2026-02-04 12:00 |
16:10:15.93 |
+30:53:48.9 |
HIP 79266 |
6.69 |
| 2026-02-05 00:00 |
16:10:17.35 |
+30:54:26.0 |
HIP 79266 |
6.04 |
| 2026-02-05 12:00 |
16:10:18.75 |
+30:55:03.2 |
HIP 79266 |
5.41 |
| 2026-02-06 00:00 |
16:10:20.11 |
+30:55:40.6 |
HIP 79266 |
4.80 |
| 2026-02-06 12:00 |
16:10:21.44 |
+30:56:18.2 |
HIP 79266 |
4.22 |
| 2026-02-07 00:00 |
16:10:22.74 |
+30:56:55.9 |
HIP 79266 |
3.68 |
| 2026-02-07 12:00 |
16:10:24.01 |
+30:57:33.8 |
HIP 79266 |
3.21 |
| 2026-02-08 00:00 |
16:10:25.24 |
+30:58:11.8 |
HIP 79266 |
2.83 |
| 2026-02-08 12:00 |
16:10:26.45 |
+30:58:50.0 |
HIP 79266 |
2.59 |
| 2026-02-09 00:00 |
16:10:27.62 |
+30:59:28.4 |
HIP 79266 |
2.53 |
| 2026-02-09 12:00 |
16:10:28.76 |
+31:00:06.9 |
HIP 79266 |
2.65 |
| 2026-02-10 00:00 |
16:10:29.86 |
+31:00:45.5 |
HIP 79266 |
2.95 |
| 2026-02-10 12:00 |
16:10:30.94 |
+31:01:24.3 |
HIP 79266 |
3.36 |
| 2026-02-11 00:00 |
16:10:31.98 |
+31:02:03.2 |
HIP 79266 |
3.86 |
| 2026-02-11 12:00 |
16:10:32.98 |
+31:02:42.2 |
HIP 79266 |
4.41 |
| 2026-02-12 00:00 |
16:10:33.96 |
+31:03:21.4 |
HIP 79266 |
5.00 |
| 2026-02-12 12:00 |
16:10:34.90 |
+31:04:00.7 |
HIP 79266 |
5.61 |
| 2026-02-13 00:00 |
16:10:35.81 |
+31:04:40.1 |
HIP 79266 |
6.24 |
| 2026-02-13 12:00 |
16:10:36.69 |
+31:05:19.7 |
HIP 79266 |
6.89 |
| 2026-02-14 00:00 |
16:10:37.53 |
+31:05:59.4 |
HIP 79266 |
7.54 |
| 2026-02-14 12:00 |
16:10:38.34 |
+31:06:39.2 |
HIP 79266 |
8.20 |
| 2026-02-15 00:00 |
16:10:39.12 |
+31:07:19.1 |
HIP 79285 |
8.78 |
| 2026-02-15 12:00 |
16:10:39.86 |
+31:07:59.1 |
HIP 79285 |
9.35 |
| 2026-02-16 00:00 |
16:10:40.57 |
+31:08:39.3 |
HIP 79285 |
9.94 |
| 2026-02-16 12:00 |
16:10:41.25 |
+31:09:19.5 |
HIP 79285 |
10.54 |
| 2026-02-17 00:00 |
16:10:41.89 |
+31:09:59.9 |
HIP 79285 |
11.16 |
| 2026-02-17 12:00 |
16:10:42.50 |
+31:10:40.3 |
HIP 79285 |
11.79 |
| 2026-02-18 00:00 |
16:10:43.07 |
+31:11:20.9 |
HIP 79285 |
12.42 |
| 2026-02-18 12:00 |
16:10:43.61 |
+31:12:01.5 |
HIP 79285 |
13.07 |
| 2026-02-19 00:00 |
16:10:44.12 |
+31:12:42.2 |
HIP 79285 |
13.72 |
| 2026-02-19 12:00 |
16:10:44.59 |
+31:13:23.0 |
HIP 79285 |
14.38 |
| 2026-02-20 00:00 |
16:10:45.03 |
+31:14:03.9 |
HIP 79285 |
15.04 |
| 2026-02-20 12:00 |
16:10:45.44 |
+31:14:44.9 |
HIP 79285 |
15.71 |
| 2026-02-21 00:00 |
16:10:45.81 |
+31:15:25.9 |
HIP 79285 |
16.38 |
| 2026-02-21 12:00 |
16:10:46.15 |
+31:16:07.1 |
HIP 79285 |
17.05 |
| 2026-02-22 00:00 |
16:10:46.45 |
+31:16:48.3 |
HIP 79285 |
17.73 |
| 2026-02-22 12:00 |
16:10:46.72 |
+31:17:29.5 |
HIP 79285 |
18.41 |
| 2026-02-23 00:00 |
16:10:46.96 |
+31:18:10.9 |
HIP 79285 |
19.09 |
| 2026-02-23 12:00 |
16:10:47.16 |
+31:18:52.2 |
HIP 79285 |
19.78 |
| 2026-02-24 00:00 |
16:10:47.33 |
+31:19:33.7 |
HIP 79285 |
20.46 |