メタデータ
| 項目 |
値 |
| Designation |
420P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-06-29T08:33:30.939840Z |
| Orbit solution date (soln_date, UTC) |
2024-05-30T01:12:43Z |
| Obs used |
223 |
| NEO |
- |
| M1 |
15.400 |
| 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) |
2014-08-01.0000000 |
| e |
0.49432464 |
| q (au) |
2.787876 |
| a (au) |
5.513174 |
| i (deg) |
14.459998 |
| Ω (om, deg) |
174.032327 |
| ω (w, deg) |
157.611202 |
| M (ma, deg) |
141.513392 |
等級
散乱 + 全体線形
$$
M_a = (14.775 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.775 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.856 |
| k |
0.999 |
| 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
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) |
| 2026-03-26 00:00 |
07:29:53.64 |
+09:23:04.8 |
HIP 36524 |
19.13 |
| 2026-03-26 12:00 |
07:29:53.88 |
+09:24:06.5 |
HIP 36524 |
18.40 |
| 2026-03-27 00:00 |
07:29:54.27 |
+09:25:07.9 |
HIP 36524 |
17.67 |
| 2026-03-27 12:00 |
07:29:54.80 |
+09:26:09.0 |
HIP 36524 |
16.95 |
| 2026-03-28 00:00 |
07:29:55.47 |
+09:27:09.7 |
HIP 36524 |
16.23 |
| 2026-03-28 12:00 |
07:29:56.28 |
+09:28:10.0 |
HIP 36524 |
15.53 |
| 2026-03-29 00:00 |
07:29:57.24 |
+09:29:09.9 |
HIP 36524 |
14.83 |
| 2026-03-29 12:00 |
07:29:58.33 |
+09:30:09.5 |
HIP 36524 |
14.15 |
| 2026-03-30 00:00 |
07:29:59.56 |
+09:31:08.7 |
HIP 36524 |
13.48 |
| 2026-03-30 12:00 |
07:30:00.94 |
+09:32:07.6 |
HIP 36524 |
12.82 |
| 2026-03-31 00:00 |
07:30:02.46 |
+09:33:06.0 |
HIP 36524 |
12.19 |
| 2026-03-31 12:00 |
07:30:04.11 |
+09:34:04.1 |
HIP 36524 |
11.58 |
| 2026-04-01 00:00 |
07:30:05.90 |
+09:35:01.8 |
HIP 36524 |
11.01 |
| 2026-04-01 12:00 |
07:30:07.84 |
+09:35:59.1 |
HIP 36524 |
10.48 |
| 2026-04-02 00:00 |
07:30:09.91 |
+09:36:56.0 |
HIP 36524 |
10.00 |
| 2026-04-02 12:00 |
07:30:12.12 |
+09:37:52.5 |
HIP 36524 |
9.58 |
| 2026-04-03 00:00 |
07:30:14.46 |
+09:38:48.7 |
HIP 36524 |
9.24 |
| 2026-04-03 12:00 |
07:30:16.95 |
+09:39:44.4 |
HIP 36524 |
8.98 |
| 2026-04-04 00:00 |
07:30:19.57 |
+09:40:39.7 |
HIP 36524 |
8.83 |
| 2026-04-04 12:00 |
07:30:22.33 |
+09:41:34.6 |
HIP 36524 |
8.79 |
| 2026-04-05 00:00 |
07:30:25.22 |
+09:42:29.1 |
HIP 36524 |
8.87 |
| 2026-04-05 12:00 |
07:30:28.25 |
+09:43:23.2 |
HIP 36524 |
9.07 |
| 2026-04-06 00:00 |
07:30:31.41 |
+09:44:16.9 |
HIP 36524 |
9.39 |
| 2026-04-06 12:00 |
07:30:34.71 |
+09:45:10.2 |
HIP 36524 |
9.82 |
| 2026-04-07 00:00 |
07:30:38.15 |
+09:46:03.0 |
HIP 36524 |
10.36 |
| 2026-04-07 12:00 |
07:30:41.71 |
+09:46:55.5 |
HIP 36524 |
11.00 |
| 2026-04-08 00:00 |
07:30:45.42 |
+09:47:47.5 |
HIP 36524 |
11.72 |
| 2026-04-08 12:00 |
07:30:49.25 |
+09:48:39.1 |
HIP 36524 |
12.52 |
| 2026-04-09 00:00 |
07:30:53.22 |
+09:49:30.2 |
HIP 36524 |
13.39 |
| 2026-04-09 12:00 |
07:30:57.32 |
+09:50:20.9 |
HIP 36524 |
14.32 |
| 2026-04-10 00:00 |
07:31:01.55 |
+09:51:11.2 |
HIP 36524 |
15.30 |
| 2026-04-10 12:00 |
07:31:05.92 |
+09:52:01.0 |
HIP 36606 |
15.16 |
| 2026-04-11 00:00 |
07:31:10.41 |
+09:52:50.4 |
HIP 36606 |
13.86 |
| 2026-04-11 12:00 |
07:31:15.04 |
+09:53:39.4 |
HIP 36606 |
12.56 |
| 2026-04-12 00:00 |
07:31:19.79 |
+09:54:27.9 |
HIP 36606 |
11.28 |
| 2026-04-12 12:00 |
07:31:24.68 |
+09:55:16.0 |
HIP 36606 |
10.03 |
| 2026-04-13 00:00 |
07:31:29.69 |
+09:56:03.6 |
HIP 36606 |
8.84 |
| 2026-04-13 12:00 |
07:31:34.84 |
+09:56:50.7 |
HIP 36606 |
7.74 |
| 2026-04-14 00:00 |
07:31:40.11 |
+09:57:37.4 |
HIP 36606 |
6.80 |
| 2026-04-14 12:00 |
07:31:45.51 |
+09:58:23.7 |
HIP 36606 |
6.11 |
| 2026-04-15 00:00 |
07:31:51.04 |
+09:59:09.5 |
HIP 36606 |
5.78 |
| 2026-04-15 12:00 |
07:31:56.69 |
+09:59:54.8 |
HIP 36606 |
5.88 |
| 2026-04-16 00:00 |
07:32:02.48 |
+10:00:39.6 |
HIP 36606 |
6.42 |