メタデータ
| 項目 |
値 |
| Designation |
496P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-11T10:59:53.473920Z |
| Orbit solution date (soln_date, UTC) |
2025-09-30T13:39:54Z |
| Obs used |
1688 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
20.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-09-26T14:11:19.680000Z |
| Discovery magnitude (MPC) |
20.22 G |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-09-12.0000000 |
| e |
0.73348756 |
| q (au) |
1.620113 |
| a (au) |
6.078939 |
| i (deg) |
14.831238 |
| Ω (om, deg) |
63.817654 |
| ω (w, deg) |
42.159614 |
| M (ma, deg) |
276.059995 |
等級
散乱 + 全体線形
$$
M_a = (11.592 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.592 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2024-09-11 |
2024-11-06 |
+18.6955 |
-6.087 |
| 2024-11-06 |
2024-12-27 |
-5.6666 |
+2.049 |
| 2024-12-27 |
2025-03-11 |
+13.4429 |
-2.871 |
| 2025-03-14 |
2025-06-28 |
-8.8446 |
+1.243 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
14:49:50.65 |
-09:41:52.6 |
HIP 72531 |
29.75 |
| 2026-05-12 12:00 |
14:49:28.98 |
-09:41:18.6 |
HIP 72531 |
29.47 |
| 2026-05-13 00:00 |
14:49:07.40 |
-09:40:45.2 |
HIP 72531 |
30.16 |
| 2026-05-13 12:00 |
14:48:45.91 |
-09:40:12.5 |
HIP 72425 |
31.06 |
| 2026-05-14 00:00 |
14:48:24.52 |
-09:39:40.5 |
HIP 72283 |
28.86 |
| 2026-05-14 12:00 |
14:48:03.23 |
-09:39:09.2 |
HIP 72283 |
25.57 |
| 2026-05-15 00:00 |
14:47:42.04 |
-09:38:38.5 |
HIP 72283 |
23.02 |
| 2026-05-15 12:00 |
14:47:20.96 |
-09:38:08.6 |
HIP 72283 |
21.48 |
| 2026-05-16 00:00 |
14:46:59.99 |
-09:37:39.4 |
HIP 72283 |
21.13 |
| 2026-05-16 12:00 |
14:46:39.13 |
-09:37:10.9 |
HIP 72283 |
22.01 |
| 2026-05-17 00:00 |
14:46:18.39 |
-09:36:43.2 |
HIP 72082 |
23.65 |
| 2026-05-17 12:00 |
14:45:57.77 |
-09:36:16.3 |
HIP 72082 |
18.88 |
| 2026-05-18 00:00 |
14:45:37.27 |
-09:35:50.1 |
HIP 72082 |
14.37 |
| 2026-05-18 12:00 |
14:45:16.90 |
-09:35:24.6 |
HIP 72082 |
10.40 |
| 2026-05-19 00:00 |
14:44:56.65 |
-09:35:00.0 |
HIP 72082 |
7.78 |
| 2026-05-19 12:00 |
14:44:36.55 |
-09:34:36.1 |
HIP 72060 |
6.43 |
| 2026-05-20 00:00 |
14:44:16.57 |
-09:34:13.1 |
HIP 72060 |
4.99 |
| 2026-05-20 12:00 |
14:43:56.74 |
-09:33:50.9 |
HIP 72060 |
7.54 |
| 2026-05-21 00:00 |
14:43:37.04 |
-09:33:29.4 |
HIP 71997 |
8.93 |
| 2026-05-21 12:00 |
14:43:17.49 |
-09:33:08.8 |
HIP 71997 |
9.07 |
| 2026-05-22 00:00 |
14:42:58.09 |
-09:32:49.1 |
HIP 71997 |
11.43 |
| 2026-05-22 12:00 |
14:42:38.84 |
-09:32:30.1 |
HIP 71969 |
14.09 |
| 2026-05-23 00:00 |
14:42:19.74 |
-09:32:12.1 |
HIP 71969 |
16.89 |
| 2026-05-23 12:00 |
14:42:00.79 |
-09:31:54.8 |
HIP 71788 |
13.95 |
| 2026-05-24 00:00 |
14:41:42.00 |
-09:31:38.5 |
HIP 71788 |
9.32 |
| 2026-05-24 12:00 |
14:41:23.37 |
-09:31:22.9 |
HIP 71788 |
4.76 |
| 2026-05-25 00:00 |
14:41:04.91 |
-09:31:08.3 |
HIP 71788 |
0.90 |
| 2026-05-25 12:00 |
14:40:46.60 |
-09:30:54.5 |
HIP 71788 |
4.49 |
| 2026-05-26 00:00 |
14:40:28.46 |
-09:30:41.6 |
HIP 71788 |
8.92 |
| 2026-05-26 12:00 |
14:40:10.49 |
-09:30:29.6 |
HIP 71788 |
13.35 |
| 2026-05-27 00:00 |
14:39:52.69 |
-09:30:18.5 |
HIP 71788 |
17.73 |
| 2026-05-27 12:00 |
14:39:35.07 |
-09:30:08.2 |
HIP 71788 |
22.08 |
| 2026-05-28 00:00 |
14:39:17.61 |
-09:29:58.9 |
HIP 71553 |
23.04 |
| 2026-05-28 12:00 |
14:39:00.33 |
-09:29:50.5 |
HIP 71553 |
19.98 |
| 2026-05-29 00:00 |
14:38:43.23 |
-09:29:42.9 |
HIP 71553 |
17.44 |
| 2026-05-29 12:00 |
14:38:26.31 |
-09:29:36.3 |
HIP 71553 |
15.64 |
| 2026-05-30 00:00 |
14:38:09.57 |
-09:29:30.6 |
HIP 71553 |
14.82 |
| 2026-05-30 12:00 |
14:37:53.02 |
-09:29:25.8 |
HIP 71553 |
15.10 |
| 2026-05-31 00:00 |
14:37:36.64 |
-09:29:21.9 |
HIP 71553 |
16.39 |
| 2026-05-31 12:00 |
14:37:20.46 |
-09:29:18.9 |
HIP 71417 |
17.09 |
| 2026-06-01 00:00 |
14:37:04.46 |
-09:29:16.9 |
HIP 71417 |
13.66 |
| 2026-06-01 12:00 |
14:36:48.65 |
-09:29:15.8 |
HIP 71417 |
10.63 |
| 2026-06-02 00:00 |
14:36:33.03 |
-09:29:15.6 |
HIP 71417 |
8.35 |