メタデータ
| 項目 |
値 |
| Designation |
382P/Larson |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-08T09:40:46.269120Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:13Z |
| Obs used |
543 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
14.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-05-31T10:50:13.056000Z |
| Discovery magnitude (MPC) |
22.00 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-02-14.0000000 |
| e |
0.27620614 |
| q (au) |
4.380367 |
| a (au) |
6.051954 |
| i (deg) |
7.867442 |
| Ω (om, deg) |
181.665365 |
| ω (w, deg) |
175.509381 |
| M (ma, deg) |
181.166011 |
等級
散乱 + 全体線形
$$
M_a = (5.637 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.637 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.503 |
| 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) |
| 2026-07-29 00:00 |
07:47:14.28 |
+15:06:34.8 |
HIP 38005 |
24.75 |
| 2026-07-29 12:00 |
07:47:34.22 |
+15:05:44.1 |
HIP 38005 |
25.67 |
| 2026-07-30 00:00 |
07:47:54.14 |
+15:04:53.2 |
HIP 38218 |
27.14 |
| 2026-07-30 12:00 |
07:48:14.04 |
+15:04:02.1 |
HIP 38218 |
22.42 |
| 2026-07-31 00:00 |
07:48:33.91 |
+15:03:10.7 |
HIP 38218 |
17.79 |
| 2026-07-31 12:00 |
07:48:53.76 |
+15:02:19.0 |
HIP 38218 |
13.34 |
| 2026-08-01 00:00 |
07:49:13.59 |
+15:01:27.2 |
HIP 38218 |
9.33 |
| 2026-08-01 12:00 |
07:49:33.38 |
+15:00:35.0 |
HIP 38218 |
6.60 |
| 2026-08-02 00:00 |
07:49:53.16 |
+14:59:42.7 |
HIP 38218 |
6.87 |
| 2026-08-02 12:00 |
07:50:12.90 |
+14:58:50.1 |
HIP 38276 |
9.48 |
| 2026-08-03 00:00 |
07:50:32.62 |
+14:57:57.3 |
HIP 38276 |
7.46 |
| 2026-08-03 12:00 |
07:50:52.31 |
+14:57:04.2 |
HIP 38276 |
8.26 |
| 2026-08-04 00:00 |
07:51:11.98 |
+14:56:11.0 |
HIP 38276 |
11.28 |
| 2026-08-04 12:00 |
07:51:31.61 |
+14:55:17.5 |
HIP 38276 |
15.27 |
| 2026-08-05 00:00 |
07:51:51.22 |
+14:54:23.8 |
HIP 38276 |
19.62 |
| 2026-08-05 12:00 |
07:52:10.80 |
+14:53:29.8 |
HIP 38524 |
16.79 |
| 2026-08-06 00:00 |
07:52:30.34 |
+14:52:35.7 |
HIP 38524 |
12.25 |
| 2026-08-06 12:00 |
07:52:49.86 |
+14:51:41.3 |
HIP 38524 |
8.02 |
| 2026-08-07 00:00 |
07:53:09.34 |
+14:50:46.7 |
HIP 38524 |
4.98 |
| 2026-08-07 12:00 |
07:53:28.79 |
+14:49:51.9 |
HIP 38524 |
5.59 |
| 2026-08-08 00:00 |
07:53:48.21 |
+14:48:56.9 |
HIP 38524 |
9.14 |
| 2026-08-08 12:00 |
07:54:07.59 |
+14:48:01.7 |
HIP 38524 |
13.47 |
| 2026-08-09 00:00 |
07:54:26.94 |
+14:47:06.3 |
HIP 38524 |
18.02 |
| 2026-08-09 12:00 |
07:54:46.26 |
+14:46:10.6 |
HIP 38524 |
22.65 |
| 2026-08-10 00:00 |
07:55:05.54 |
+14:45:14.8 |
HIP 38524 |
27.32 |
| 2026-08-10 12:00 |
07:55:24.78 |
+14:44:18.8 |
HIP 38837 |
25.26 |
| 2026-08-11 00:00 |
07:55:43.99 |
+14:43:22.6 |
HIP 38837 |
22.11 |
| 2026-08-11 12:00 |
07:56:03.16 |
+14:42:26.2 |
HIP 38837 |
19.61 |
| 2026-08-12 00:00 |
07:56:22.29 |
+14:41:29.7 |
HIP 38837 |
18.04 |
| 2026-08-12 12:00 |
07:56:41.38 |
+14:40:32.9 |
HIP 38837 |
17.64 |
| 2026-08-13 00:00 |
07:57:00.43 |
+14:39:36.0 |
HIP 38837 |
18.47 |
| 2026-08-13 12:00 |
07:57:19.44 |
+14:38:38.9 |
HIP 38819 |
20.29 |
| 2026-08-14 00:00 |
07:57:38.41 |
+14:37:41.6 |
HIP 38819 |
21.97 |
| 2026-08-14 12:00 |
07:57:57.34 |
+14:36:44.1 |
HIP 38819 |
24.45 |
| 2026-08-15 00:00 |
07:58:16.22 |
+14:35:46.5 |
HIP 38819 |
27.49 |
| 2026-08-15 12:00 |
07:58:35.07 |
+14:34:48.8 |
HIP 38819 |
30.93 |
| 2026-08-16 00:00 |
07:58:53.87 |
+14:33:50.8 |
HIP 39178 |
27.91 |
| 2026-08-16 12:00 |
07:59:12.62 |
+14:32:52.7 |
HIP 39178 |
23.69 |
| 2026-08-17 00:00 |
07:59:31.33 |
+14:31:54.5 |
HIP 39178 |
19.66 |
| 2026-08-17 12:00 |
07:59:49.99 |
+14:30:56.1 |
HIP 39178 |
15.97 |
| 2026-08-18 00:00 |
08:00:08.61 |
+14:29:57.6 |
HIP 39178 |
12.91 |
| 2026-08-18 12:00 |
08:00:27.18 |
+14:28:58.9 |
HIP 39178 |
10.98 |
| 2026-08-19 00:00 |
08:00:45.70 |
+14:28:00.1 |
HIP 39178 |
10.82 |