メタデータ
| 項目 |
値 |
| Designation |
P/2015 D6 (Lemmon-PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-07-21T02:31:34.800960Z |
| Orbit solution date (soln_date, UTC) |
2024-09-01T19:42:23Z |
| Obs used |
66 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
16.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-08-03.0000000 |
| e |
0.36774122 |
| q (au) |
4.567753 |
| a (au) |
7.224499 |
| i (deg) |
20.225177 |
| Ω (om, deg) |
46.134037 |
| ω (w, deg) |
126.551812 |
| M (ma, deg) |
0.654493 |
等級
散乱 + 全体線形
$$
M_a = (7.288 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.288 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.997 |
| 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) |
| 2026-03-26 00:00 |
00:37:34.89 |
-09:16:26.8 |
HIP 2961 |
12.06 |
| 2026-03-26 12:00 |
00:37:47.58 |
-09:14:51.3 |
HIP 2961 |
10.73 |
| 2026-03-27 00:00 |
00:38:00.28 |
-09:13:16.0 |
HIP 2961 |
10.48 |
| 2026-03-27 12:00 |
00:38:12.98 |
-09:11:41.0 |
HIP 2961 |
11.36 |
| 2026-03-28 00:00 |
00:38:25.69 |
-09:10:06.2 |
HIP 2961 |
13.16 |
| 2026-03-28 12:00 |
00:38:38.40 |
-09:08:31.7 |
HIP 2961 |
15.56 |
| 2026-03-29 00:00 |
00:38:51.11 |
-09:06:57.5 |
HIP 2961 |
18.32 |
| 2026-03-29 12:00 |
00:39:03.83 |
-09:05:23.5 |
HIP 2961 |
21.31 |
| 2026-03-30 00:00 |
00:39:16.55 |
-09:03:49.9 |
HIP 2961 |
24.43 |
| 2026-03-30 12:00 |
00:39:29.27 |
-09:02:16.5 |
HIP 2961 |
27.65 |
| 2026-03-31 00:00 |
00:39:42.00 |
-09:00:43.4 |
HIP 2961 |
30.93 |
| 2026-03-31 12:00 |
00:39:54.72 |
-08:59:10.5 |
HIP 2961 |
34.26 |
| 2026-04-01 00:00 |
00:40:07.45 |
-08:57:38.0 |
HIP 2961 |
37.61 |
| 2026-04-01 12:00 |
00:40:20.18 |
-08:56:05.7 |
HIP 2961 |
40.99 |
| 2026-04-02 00:00 |
00:40:32.90 |
-08:54:33.7 |
HIP 2961 |
44.39 |
| 2026-04-02 12:00 |
00:40:45.63 |
-08:53:02.1 |
HIP 3406 |
46.67 |
| 2026-04-03 00:00 |
00:40:58.35 |
-08:51:30.7 |
HIP 3406 |
45.01 |
| 2026-04-03 12:00 |
00:41:11.07 |
-08:49:59.6 |
HIP 3406 |
43.55 |
| 2026-04-04 00:00 |
00:41:23.79 |
-08:48:28.8 |
HIP 3406 |
42.34 |
| 2026-04-04 12:00 |
00:41:36.51 |
-08:46:58.4 |
HIP 3406 |
41.38 |
| 2026-04-05 00:00 |
00:41:49.22 |
-08:45:28.2 |
HIP 3283 |
40.14 |
| 2026-04-05 12:00 |
00:42:01.93 |
-08:43:58.4 |
HIP 3283 |
38.73 |
| 2026-04-06 00:00 |
00:42:14.64 |
-08:42:28.8 |
HIP 3283 |
37.60 |
| 2026-04-06 12:00 |
00:42:27.34 |
-08:40:59.6 |
HIP 3283 |
36.77 |
| 2026-04-07 00:00 |
00:42:40.04 |
-08:39:30.7 |
HIP 3283 |
36.26 |
| 2026-04-07 12:00 |
00:42:52.73 |
-08:38:02.1 |
HIP 3283 |
36.08 |
| 2026-04-08 00:00 |
00:43:05.41 |
-08:36:33.9 |
HIP 3283 |
36.24 |
| 2026-04-08 12:00 |
00:43:18.09 |
-08:35:06.0 |
HIP 3283 |
36.73 |
| 2026-04-09 00:00 |
00:43:30.76 |
-08:33:38.4 |
HIP 3283 |
37.54 |
| 2026-04-09 12:00 |
00:43:43.42 |
-08:32:11.1 |
HIP 3283 |
38.64 |
| 2026-04-10 00:00 |
00:43:56.08 |
-08:30:44.2 |
HIP 3609 |
35.57 |
| 2026-04-10 12:00 |
00:44:08.72 |
-08:29:17.6 |
HIP 3609 |
32.16 |
| 2026-04-11 00:00 |
00:44:21.36 |
-08:27:51.4 |
HIP 3609 |
28.75 |
| 2026-04-11 12:00 |
00:44:33.99 |
-08:26:25.5 |
HIP 3609 |
25.36 |
| 2026-04-12 00:00 |
00:44:46.61 |
-08:25:00.0 |
HIP 3609 |
21.99 |
| 2026-04-12 12:00 |
00:44:59.21 |
-08:23:34.8 |
HIP 3609 |
18.64 |
| 2026-04-13 00:00 |
00:45:11.81 |
-08:22:09.9 |
HIP 3609 |
15.32 |
| 2026-04-13 12:00 |
00:45:24.39 |
-08:20:45.5 |
HIP 3609 |
12.07 |
| 2026-04-14 00:00 |
00:45:36.97 |
-08:19:21.4 |
HIP 3609 |
8.95 |
| 2026-04-14 12:00 |
00:45:49.52 |
-08:17:57.6 |
HIP 3609 |
6.14 |
| 2026-04-15 00:00 |
00:46:02.07 |
-08:16:34.3 |
HIP 3609 |
4.30 |
| 2026-04-15 12:00 |
00:46:14.60 |
-08:15:11.3 |
HIP 3609 |
4.72 |
| 2026-04-16 00:00 |
00:46:27.12 |
-08:13:48.7 |
HIP 3609 |
7.01 |