メタデータ
| 項目 |
値 |
| Designation |
349P/Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-08-26T12:49:38.985600Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:23Z |
| Obs used |
209 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
17.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-08-10.0000000 |
| e |
0.29990139 |
| q (au) |
2.499745 |
| a (au) |
3.570561 |
| i (deg) |
5.492271 |
| Ω (om, deg) |
331.761163 |
| ω (w, deg) |
255.998978 |
| M (ma, deg) |
104.225129 |
等級
散乱 + 全体線形
$$
M_a = (15.374 + 3.702\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.374 |
| n |
3.702 |
| gf |
0.994 |
| gb |
-0.646 |
| k |
0.914 |
| δ90 |
9.992 |
| 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) |
| 2026-07-29 00:00 |
01:16:00.21 |
+11:54:58.9 |
HIP 5920 |
27.03 |
| 2026-07-29 12:00 |
01:16:03.46 |
+11:56:00.7 |
HIP 5920 |
28.01 |
| 2026-07-30 00:00 |
01:16:06.50 |
+11:57:01.2 |
HIP 5920 |
28.99 |
| 2026-07-30 12:00 |
01:16:09.33 |
+11:58:00.6 |
HIP 6043 |
29.08 |
| 2026-07-31 00:00 |
01:16:11.93 |
+11:58:58.7 |
HIP 6043 |
27.95 |
| 2026-07-31 12:00 |
01:16:14.32 |
+11:59:55.6 |
HIP 6043 |
26.89 |
| 2026-08-01 00:00 |
01:16:16.49 |
+12:00:51.2 |
HIP 6043 |
25.87 |
| 2026-08-01 12:00 |
01:16:18.43 |
+12:01:45.6 |
HIP 6043 |
24.92 |
| 2026-08-02 00:00 |
01:16:20.16 |
+12:02:38.7 |
HIP 6043 |
24.03 |
| 2026-08-02 12:00 |
01:16:21.67 |
+12:03:30.6 |
HIP 6043 |
23.21 |
| 2026-08-03 00:00 |
01:16:22.95 |
+12:04:21.3 |
HIP 6043 |
22.45 |
| 2026-08-03 12:00 |
01:16:24.01 |
+12:05:10.6 |
HIP 6043 |
21.75 |
| 2026-08-04 00:00 |
01:16:24.85 |
+12:05:58.7 |
HIP 6043 |
21.13 |
| 2026-08-04 12:00 |
01:16:25.47 |
+12:06:45.5 |
HIP 6043 |
20.57 |
| 2026-08-05 00:00 |
01:16:25.86 |
+12:07:31.0 |
HIP 6043 |
20.09 |
| 2026-08-05 12:00 |
01:16:26.02 |
+12:08:15.2 |
HIP 6043 |
19.69 |
| 2026-08-06 00:00 |
01:16:25.96 |
+12:08:58.2 |
HIP 6043 |
19.37 |
| 2026-08-06 12:00 |
01:16:25.67 |
+12:09:39.8 |
HIP 6043 |
19.13 |
| 2026-08-07 00:00 |
01:16:25.16 |
+12:10:20.1 |
HIP 6043 |
18.97 |
| 2026-08-07 12:00 |
01:16:24.42 |
+12:10:59.1 |
HIP 6043 |
18.89 |
| 2026-08-08 00:00 |
01:16:23.45 |
+12:11:36.7 |
HIP 6043 |
18.89 |
| 2026-08-08 12:00 |
01:16:22.25 |
+12:12:13.0 |
HIP 6043 |
18.98 |
| 2026-08-09 00:00 |
01:16:20.83 |
+12:12:48.0 |
HIP 6043 |
19.16 |
| 2026-08-09 12:00 |
01:16:19.17 |
+12:13:21.7 |
HIP 6043 |
19.41 |
| 2026-08-10 00:00 |
01:16:17.29 |
+12:13:54.0 |
HIP 6043 |
19.75 |
| 2026-08-10 12:00 |
01:16:15.17 |
+12:14:25.0 |
HIP 6043 |
20.16 |
| 2026-08-11 00:00 |
01:16:12.83 |
+12:14:54.6 |
HIP 6043 |
20.65 |
| 2026-08-11 12:00 |
01:16:10.25 |
+12:15:22.8 |
HIP 6043 |
21.22 |
| 2026-08-12 00:00 |
01:16:07.45 |
+12:15:49.7 |
HIP 6043 |
21.85 |
| 2026-08-12 12:00 |
01:16:04.41 |
+12:16:15.2 |
HIP 6043 |
22.56 |
| 2026-08-13 00:00 |
01:16:01.15 |
+12:16:39.3 |
HIP 6043 |
23.33 |
| 2026-08-13 12:00 |
01:15:57.66 |
+12:17:02.1 |
HIP 6043 |
24.17 |
| 2026-08-14 00:00 |
01:15:53.93 |
+12:17:23.5 |
HIP 6043 |
25.07 |
| 2026-08-14 12:00 |
01:15:49.98 |
+12:17:43.5 |
HIP 6043 |
26.03 |
| 2026-08-15 00:00 |
01:15:45.79 |
+12:18:02.2 |
HIP 6043 |
27.05 |
| 2026-08-15 12:00 |
01:15:41.38 |
+12:18:19.4 |
HIP 6043 |
28.14 |
| 2026-08-16 00:00 |
01:15:36.74 |
+12:18:35.3 |
HIP 6043 |
29.28 |
| 2026-08-16 12:00 |
01:15:31.86 |
+12:18:49.7 |
HIP 6043 |
30.47 |
| 2026-08-17 00:00 |
01:15:26.76 |
+12:19:02.8 |
HIP 6043 |
31.72 |
| 2026-08-17 12:00 |
01:15:21.44 |
+12:19:14.5 |
HIP 6043 |
33.03 |
| 2026-08-18 00:00 |
01:15:15.88 |
+12:19:24.8 |
HIP 6043 |
34.40 |
| 2026-08-18 12:00 |
01:15:10.10 |
+12:19:33.7 |
HIP 6043 |
35.81 |
| 2026-08-19 00:00 |
01:15:04.09 |
+12:19:41.2 |
HIP 6043 |
37.29 |