メタデータ
| 項目 |
値 |
| Designation |
464P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-02-28T09:38:59.409600Z |
| Orbit solution date (soln_date, UTC) |
2024-08-18T18:42:26Z |
| Obs used |
175 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2014-07-25T10:20:03.840000Z |
| Discovery magnitude (MPC) |
21.50 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) |
2022-06-17.0000000 |
| e |
0.28094023 |
| q (au) |
3.372325 |
| a (au) |
4.689909 |
| i (deg) |
21.665175 |
| Ω (om, deg) |
309.606244 |
| ω (w, deg) |
267.729176 |
| M (ma, deg) |
335.118359 |
等級
散乱 + 全体線形
$$
M_a = (7.375 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.375 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2022-01-09 |
2023-02-03 |
+34.8067 |
-18.081 |
| 2023-03-15 |
2024-08-06 |
+13.0591 |
-7.225 |
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 |
23:44:47.66 |
+13:33:39.8 |
HIP 117140 |
6.67 |
| 2026-05-12 12:00 |
23:45:04.01 |
+13:36:52.9 |
HIP 117140 |
10.26 |
| 2026-05-13 00:00 |
23:45:20.27 |
+13:40:05.8 |
HIP 117140 |
14.76 |
| 2026-05-13 12:00 |
23:45:36.44 |
+13:43:18.6 |
HIP 117140 |
19.54 |
| 2026-05-14 00:00 |
23:45:52.51 |
+13:46:31.2 |
HIP 117140 |
24.42 |
| 2026-05-14 12:00 |
23:46:08.49 |
+13:49:43.7 |
HIP 117126 |
26.83 |
| 2026-05-15 00:00 |
23:46:24.37 |
+13:52:56.0 |
HIP 117126 |
28.32 |
| 2026-05-15 12:00 |
23:46:40.15 |
+13:56:08.1 |
HIP 117126 |
30.54 |
| 2026-05-16 00:00 |
23:46:55.84 |
+13:59:20.0 |
HIP 117126 |
33.34 |
| 2026-05-16 12:00 |
23:47:11.42 |
+14:02:31.7 |
HIP 117126 |
36.59 |
| 2026-05-17 00:00 |
23:47:26.91 |
+14:05:43.3 |
HIP 117126 |
40.15 |
| 2026-05-17 12:00 |
23:47:42.30 |
+14:08:54.6 |
HIP 117126 |
43.95 |
| 2026-05-18 00:00 |
23:47:57.59 |
+14:12:05.7 |
HIP 117181 |
46.35 |
| 2026-05-18 12:00 |
23:48:12.77 |
+14:15:16.7 |
HIP 117621 |
45.68 |
| 2026-05-19 00:00 |
23:48:27.85 |
+14:18:27.3 |
HIP 117621 |
42.83 |
| 2026-05-19 12:00 |
23:48:42.83 |
+14:21:37.8 |
HIP 117621 |
40.39 |
| 2026-05-20 00:00 |
23:48:57.71 |
+14:24:48.1 |
HIP 117621 |
38.42 |
| 2026-05-20 12:00 |
23:49:12.48 |
+14:27:58.1 |
HIP 117621 |
37.00 |
| 2026-05-21 00:00 |
23:49:27.15 |
+14:31:07.9 |
HIP 117417 |
35.72 |
| 2026-05-21 12:00 |
23:49:41.71 |
+14:34:17.4 |
HIP 117417 |
34.40 |
| 2026-05-22 00:00 |
23:49:56.16 |
+14:37:26.7 |
HIP 117417 |
33.69 |
| 2026-05-22 12:00 |
23:50:10.51 |
+14:40:35.7 |
HIP 117417 |
33.60 |
| 2026-05-23 00:00 |
23:50:24.75 |
+14:43:44.5 |
HIP 117417 |
34.15 |
| 2026-05-23 12:00 |
23:50:38.88 |
+14:46:53.0 |
HIP 117417 |
35.29 |
| 2026-05-24 00:00 |
23:50:52.90 |
+14:50:01.2 |
HIP 117417 |
36.96 |
| 2026-05-24 12:00 |
23:51:06.81 |
+14:53:09.2 |
HIP 117417 |
39.07 |
| 2026-05-25 00:00 |
23:51:20.62 |
+14:56:16.9 |
HIP 117417 |
41.56 |
| 2026-05-25 12:00 |
23:51:34.31 |
+14:59:24.3 |
HIP 117826 |
43.83 |
| 2026-05-26 00:00 |
23:51:47.89 |
+15:02:31.5 |
HIP 117826 |
39.31 |
| 2026-05-26 12:00 |
23:52:01.36 |
+15:05:38.3 |
HIP 117826 |
34.81 |
| 2026-05-27 00:00 |
23:52:14.71 |
+15:08:44.9 |
HIP 117826 |
30.33 |
| 2026-05-27 12:00 |
23:52:27.95 |
+15:11:51.2 |
HIP 117826 |
25.89 |
| 2026-05-28 00:00 |
23:52:41.08 |
+15:14:57.1 |
HIP 117826 |
21.46 |
| 2026-05-28 12:00 |
23:52:54.10 |
+15:18:02.8 |
HIP 117826 |
17.07 |
| 2026-05-29 00:00 |
23:53:06.99 |
+15:21:08.1 |
HIP 117826 |
12.72 |
| 2026-05-29 12:00 |
23:53:19.78 |
+15:24:13.1 |
HIP 117826 |
8.42 |
| 2026-05-30 00:00 |
23:53:32.44 |
+15:27:17.8 |
HIP 117826 |
4.28 |
| 2026-05-30 12:00 |
23:53:44.99 |
+15:30:22.2 |
HIP 117826 |
1.83 |
| 2026-05-31 00:00 |
23:53:57.42 |
+15:33:26.3 |
HIP 117826 |
5.04 |
| 2026-05-31 12:00 |
23:54:09.73 |
+15:36:30.0 |
HIP 117826 |
9.16 |
| 2026-06-01 00:00 |
23:54:21.92 |
+15:39:33.4 |
HIP 117826 |
13.34 |
| 2026-06-01 12:00 |
23:54:33.99 |
+15:42:36.4 |
HIP 117849 |
13.24 |
| 2026-06-02 00:00 |
23:54:45.94 |
+15:45:39.1 |
HIP 117849 |
12.65 |