メタデータ
| 項目 |
値 |
| Designation |
384P/Kowalski |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-10-11T09:33:16.280640Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:14Z |
| Obs used |
740 |
| NEO |
Yes |
| M1 |
20.000 |
| 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) |
2019-04-27.0000000 |
| e |
0.61538477 |
| q (au) |
1.116494 |
| a (au) |
2.902887 |
| i (deg) |
7.280738 |
| Ω (om, deg) |
354.239718 |
| ω (w, deg) |
37.622709 |
| M (ma, deg) |
326.641274 |
等級
散乱 + 全体線形
$$
M_a = (19.277 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.277 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.716 |
| k |
0.856 |
| δ90 |
2.133 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
12:19:19.96 |
-05:01:46.2 |
HIP 60006 |
13.93 |
| 2026-07-29 12:00 |
12:19:37.85 |
-05:03:40.9 |
HIP 60006 |
18.47 |
| 2026-07-30 00:00 |
12:19:55.85 |
-05:05:36.3 |
HIP 60006 |
23.17 |
| 2026-07-30 12:00 |
12:20:13.95 |
-05:07:32.4 |
HIP 60006 |
27.95 |
| 2026-07-31 00:00 |
12:20:32.15 |
-05:09:29.2 |
HIP 60006 |
32.80 |
| 2026-07-31 12:00 |
12:20:50.45 |
-05:11:26.6 |
HIP 60006 |
37.70 |
| 2026-08-01 00:00 |
12:21:08.85 |
-05:13:24.8 |
HIP 60418 |
34.87 |
| 2026-08-01 12:00 |
12:21:27.34 |
-05:15:23.6 |
HIP 60399 |
30.66 |
| 2026-08-02 00:00 |
12:21:45.94 |
-05:17:23.1 |
HIP 60399 |
25.88 |
| 2026-08-02 12:00 |
12:22:04.63 |
-05:19:23.2 |
HIP 60399 |
21.20 |
| 2026-08-03 00:00 |
12:22:23.42 |
-05:21:24.0 |
HIP 60399 |
16.72 |
| 2026-08-03 12:00 |
12:22:42.30 |
-05:23:25.4 |
HIP 60399 |
12.69 |
| 2026-08-04 00:00 |
12:23:01.28 |
-05:25:27.5 |
HIP 60399 |
9.73 |
| 2026-08-04 12:00 |
12:23:20.35 |
-05:27:30.2 |
HIP 60399 |
9.02 |
| 2026-08-05 00:00 |
12:23:39.51 |
-05:29:33.6 |
HIP 60399 |
11.03 |
| 2026-08-05 12:00 |
12:23:58.77 |
-05:31:37.5 |
HIP 60399 |
14.72 |
| 2026-08-06 00:00 |
12:24:18.12 |
-05:33:42.2 |
HIP 60399 |
19.15 |
| 2026-08-06 12:00 |
12:24:37.56 |
-05:35:47.4 |
HIP 60399 |
23.94 |
| 2026-08-07 00:00 |
12:24:57.09 |
-05:37:53.2 |
HIP 60727 |
27.63 |
| 2026-08-07 12:00 |
12:25:16.71 |
-05:39:59.7 |
HIP 60727 |
23.08 |
| 2026-08-08 00:00 |
12:25:36.42 |
-05:42:06.8 |
HIP 60727 |
18.92 |
| 2026-08-08 12:00 |
12:25:56.22 |
-05:44:14.4 |
HIP 60727 |
15.49 |
| 2026-08-09 00:00 |
12:26:16.11 |
-05:46:22.7 |
HIP 60727 |
13.40 |
| 2026-08-09 12:00 |
12:26:36.08 |
-05:48:31.5 |
HIP 60727 |
13.32 |
| 2026-08-10 00:00 |
12:26:56.14 |
-05:50:41.0 |
HIP 60702 |
13.67 |
| 2026-08-10 12:00 |
12:27:16.28 |
-05:52:51.0 |
HIP 60702 |
15.35 |
| 2026-08-11 00:00 |
12:27:36.51 |
-05:55:01.6 |
HIP 60702 |
18.56 |
| 2026-08-11 12:00 |
12:27:56.83 |
-05:57:12.7 |
HIP 60702 |
22.67 |
| 2026-08-12 00:00 |
12:28:17.22 |
-05:59:24.5 |
HIP 60987 |
26.12 |
| 2026-08-12 12:00 |
12:28:37.70 |
-06:01:36.8 |
HIP 60987 |
20.96 |
| 2026-08-13 00:00 |
12:28:58.26 |
-06:03:49.6 |
HIP 60987 |
16.03 |
| 2026-08-13 12:00 |
12:29:18.90 |
-06:06:03.0 |
HIP 60987 |
11.68 |
| 2026-08-14 00:00 |
12:29:39.62 |
-06:08:16.9 |
HIP 60987 |
8.85 |
| 2026-08-14 12:00 |
12:30:00.42 |
-06:10:31.3 |
HIP 60987 |
9.14 |
| 2026-08-15 00:00 |
12:30:21.30 |
-06:12:46.3 |
HIP 60987 |
12.35 |
| 2026-08-15 12:00 |
12:30:42.25 |
-06:15:01.8 |
HIP 60987 |
16.91 |
| 2026-08-16 00:00 |
12:31:03.29 |
-06:17:17.8 |
HIP 60987 |
22.02 |
| 2026-08-16 12:00 |
12:31:24.39 |
-06:19:34.3 |
HIP 60987 |
27.38 |
| 2026-08-17 00:00 |
12:31:45.57 |
-06:21:51.4 |
HIP 61285 |
28.46 |
| 2026-08-17 12:00 |
12:32:06.83 |
-06:24:08.9 |
HIP 61285 |
22.70 |
| 2026-08-18 00:00 |
12:32:28.16 |
-06:26:26.9 |
HIP 61285 |
16.93 |
| 2026-08-18 12:00 |
12:32:49.56 |
-06:28:45.4 |
HIP 61285 |
11.13 |
| 2026-08-19 00:00 |
12:33:11.03 |
-06:31:04.4 |
HIP 61285 |
5.32 |