メタデータ
| 項目 |
値 |
| Designation |
369P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-14T18:02:25.463040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:38Z |
| Obs used |
404 |
| NEO |
- |
| M1 |
15.900 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-08-10T04:19:55.200000Z |
| Discovery magnitude (MPC) |
19.00 N |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-03-03.0000000 |
| e |
0.55464071 |
| q (au) |
1.952852 |
| a (au) |
4.384892 |
| i (deg) |
10.318441 |
| Ω (om, deg) |
47.369507 |
| ω (w, deg) |
13.332806 |
| M (ma, deg) |
218.121804 |
等級
散乱 + 全体線形
$$
M_a = (14.079 + 4.801\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.079 |
| n |
4.801 |
| gf |
0.800 |
| gb |
-0.671 |
| k |
0.929 |
| δ90 |
1.000 |
| 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
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) |
| 2026-05-12 00:00 |
20:40:18.29 |
-28:57:19.9 |
HIP 101985 |
10.37 |
| 2026-05-12 12:00 |
20:40:24.84 |
-28:58:18.4 |
HIP 101985 |
11.80 |
| 2026-05-13 00:00 |
20:40:31.17 |
-28:59:17.9 |
HIP 102020 |
12.69 |
| 2026-05-13 12:00 |
20:40:37.28 |
-29:00:18.3 |
HIP 102020 |
11.91 |
| 2026-05-14 00:00 |
20:40:43.16 |
-29:01:19.7 |
HIP 102020 |
11.29 |
| 2026-05-14 12:00 |
20:40:48.81 |
-29:02:22.1 |
HIP 102020 |
10.84 |
| 2026-05-15 00:00 |
20:40:54.24 |
-29:03:25.4 |
HIP 102020 |
10.58 |
| 2026-05-15 12:00 |
20:40:59.44 |
-29:04:29.7 |
HIP 102020 |
10.51 |
| 2026-05-16 00:00 |
20:41:04.41 |
-29:05:35.0 |
HIP 102020 |
10.62 |
| 2026-05-16 12:00 |
20:41:09.15 |
-29:06:41.2 |
HIP 102020 |
10.89 |
| 2026-05-17 00:00 |
20:41:13.66 |
-29:07:48.4 |
HIP 102020 |
11.31 |
| 2026-05-17 12:00 |
20:41:17.94 |
-29:08:56.5 |
HIP 102020 |
11.84 |
| 2026-05-18 00:00 |
20:41:21.99 |
-29:10:05.6 |
HIP 102020 |
12.48 |
| 2026-05-18 12:00 |
20:41:25.80 |
-29:11:15.7 |
HIP 102020 |
13.19 |
| 2026-05-19 00:00 |
20:41:29.37 |
-29:12:26.7 |
HIP 102020 |
13.96 |
| 2026-05-19 12:00 |
20:41:32.71 |
-29:13:38.7 |
HIP 102020 |
14.78 |
| 2026-05-20 00:00 |
20:41:35.81 |
-29:14:51.6 |
HIP 102020 |
15.63 |
| 2026-05-20 12:00 |
20:41:38.68 |
-29:16:05.4 |
HIP 102020 |
16.51 |
| 2026-05-21 00:00 |
20:41:41.31 |
-29:17:20.2 |
HIP 102020 |
17.41 |
| 2026-05-21 12:00 |
20:41:43.70 |
-29:18:36.0 |
HIP 102020 |
18.33 |
| 2026-05-22 00:00 |
20:41:45.85 |
-29:19:52.6 |
HIP 102020 |
19.25 |
| 2026-05-22 12:00 |
20:41:47.76 |
-29:21:10.2 |
HIP 102264 |
19.69 |
| 2026-05-23 00:00 |
20:41:49.43 |
-29:22:28.7 |
HIP 102264 |
19.09 |
| 2026-05-23 12:00 |
20:41:50.85 |
-29:23:48.2 |
HIP 102264 |
18.62 |
| 2026-05-24 00:00 |
20:41:52.04 |
-29:25:08.6 |
HIP 102264 |
18.29 |
| 2026-05-24 12:00 |
20:41:52.98 |
-29:26:29.8 |
HIP 102264 |
18.11 |
| 2026-05-25 00:00 |
20:41:53.68 |
-29:27:52.0 |
HIP 102264 |
18.10 |
| 2026-05-25 12:00 |
20:41:54.14 |
-29:29:15.1 |
HIP 102264 |
18.24 |
| 2026-05-26 00:00 |
20:41:54.35 |
-29:30:39.1 |
HIP 102264 |
18.54 |
| 2026-05-26 12:00 |
20:41:54.31 |
-29:32:04.0 |
HIP 102264 |
18.99 |
| 2026-05-27 00:00 |
20:41:54.03 |
-29:33:29.7 |
HIP 102264 |
19.59 |
| 2026-05-27 12:00 |
20:41:53.51 |
-29:34:56.4 |
HIP 102264 |
20.33 |
| 2026-05-28 00:00 |
20:41:52.73 |
-29:36:23.9 |
HIP 102264 |
21.20 |
| 2026-05-28 12:00 |
20:41:51.71 |
-29:37:52.3 |
HIP 102264 |
22.18 |
| 2026-05-29 00:00 |
20:41:50.43 |
-29:39:21.5 |
HIP 102264 |
23.27 |
| 2026-05-29 12:00 |
20:41:48.91 |
-29:40:51.7 |
HIP 102264 |
24.45 |
| 2026-05-30 00:00 |
20:41:47.14 |
-29:42:22.6 |
HIP 102264 |
25.72 |
| 2026-05-30 12:00 |
20:41:45.12 |
-29:43:54.4 |
HIP 102025 |
25.11 |
| 2026-05-31 00:00 |
20:41:42.84 |
-29:45:27.1 |
HIP 102025 |
23.62 |
| 2026-05-31 12:00 |
20:41:40.32 |
-29:47:00.6 |
HIP 102025 |
22.10 |
| 2026-06-01 00:00 |
20:41:37.54 |
-29:48:34.9 |
HIP 102025 |
20.55 |
| 2026-06-01 12:00 |
20:41:34.51 |
-29:50:10.0 |
HIP 102025 |
18.97 |
| 2026-06-02 00:00 |
20:41:31.22 |
-29:51:46.0 |
HIP 102025 |
17.37 |