メタデータ
| 項目 |
値 |
| Designation |
516P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2026-08-12T08:01:53.051520Z |
| Orbit solution date (soln_date, UTC) |
2026-06-07T19:15:33Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
17.700 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2013-04-15T11:39:10.742400Z |
| Discovery magnitude (MPC) |
22.20 G |
| 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) |
2023-06-24.0000000 |
| e |
0.32345368 |
| q (au) |
2.460613 |
| a (au) |
3.637021 |
| i (deg) |
4.009993 |
| Ω (om, deg) |
105.175738 |
| ω (w, deg) |
73.550094 |
| M (ma, deg) |
197.251203 |
等級
散乱 + 全体線形
$$
M_a = (11.573 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.573 |
| n |
6.000 |
| gf |
0.999 |
| 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
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 |
10:48:41.09 |
+10:38:14.1 |
HIP 52911 |
10.08 |
| 2026-07-29 12:00 |
10:49:32.55 |
+10:33:02.9 |
HIP 52911 |
4.22 |
| 2026-07-30 00:00 |
10:50:24.04 |
+10:27:51.2 |
HIP 52999 |
8.20 |
| 2026-07-30 12:00 |
10:51:15.54 |
+10:22:38.7 |
HIP 52999 |
11.37 |
| 2026-07-31 00:00 |
10:52:07.07 |
+10:17:25.7 |
HIP 53170 |
11.25 |
| 2026-07-31 12:00 |
10:52:58.63 |
+10:12:12.0 |
HIP 53170 |
5.82 |
| 2026-08-01 00:00 |
10:53:50.20 |
+10:06:57.7 |
HIP 53170 |
17.83 |
| 2026-08-01 12:00 |
10:54:41.80 |
+10:01:42.7 |
HIP 53431 |
17.60 |
| 2026-08-02 00:00 |
10:55:33.41 |
+09:56:27.2 |
HIP 53431 |
11.55 |
| 2026-08-02 12:00 |
10:56:25.05 |
+09:51:11.0 |
HIP 53431 |
18.32 |
| 2026-08-03 00:00 |
10:57:16.71 |
+09:45:54.3 |
HIP 53596 |
11.12 |
| 2026-08-03 12:00 |
10:58:08.39 |
+09:40:36.9 |
HIP 53619 |
1.73 |
| 2026-08-04 00:00 |
10:59:00.10 |
+09:35:19.0 |
HIP 53619 |
13.69 |
| 2026-08-04 12:00 |
10:59:51.82 |
+09:30:00.4 |
HIP 53727 |
26.25 |
| 2026-08-05 00:00 |
11:00:43.57 |
+09:24:41.3 |
HIP 53977 |
30.53 |
| 2026-08-05 12:00 |
11:01:35.34 |
+09:19:21.6 |
HIP 53977 |
16.80 |
| 2026-08-06 00:00 |
11:02:27.12 |
+09:14:01.4 |
HIP 53977 |
3.91 |
| 2026-08-06 12:00 |
11:03:18.93 |
+09:08:40.6 |
HIP 53977 |
11.49 |
| 2026-08-07 00:00 |
11:04:10.76 |
+09:03:19.2 |
HIP 53977 |
25.17 |
| 2026-08-07 12:00 |
11:05:02.61 |
+08:57:57.3 |
HIP 53977 |
39.00 |
| 2026-08-08 00:00 |
11:05:54.48 |
+08:52:34.8 |
HIP 54417 |
33.71 |
| 2026-08-08 12:00 |
11:06:46.36 |
+08:47:11.8 |
HIP 54417 |
24.32 |
| 2026-08-09 00:00 |
11:07:38.27 |
+08:41:48.2 |
HIP 54417 |
20.80 |
| 2026-08-09 12:00 |
11:08:30.20 |
+08:36:24.2 |
HIP 54417 |
25.71 |
| 2026-08-10 00:00 |
11:09:22.15 |
+08:30:59.6 |
HIP 54417 |
35.75 |
| 2026-08-10 12:00 |
11:10:14.11 |
+08:25:34.5 |
HIP 54604 |
32.34 |
| 2026-08-11 00:00 |
11:11:06.10 |
+08:20:08.9 |
HIP 54604 |
28.04 |
| 2026-08-11 12:00 |
11:11:58.10 |
+08:14:42.9 |
HIP 54789 |
25.93 |
| 2026-08-12 00:00 |
11:12:50.12 |
+08:09:16.3 |
HIP 54863 |
18.61 |
| 2026-08-12 12:00 |
11:13:42.16 |
+08:03:49.3 |
HIP 54863 |
4.87 |
| 2026-08-13 00:00 |
11:14:34.21 |
+07:58:21.8 |
HIP 54863 |
9.61 |
| 2026-08-13 12:00 |
11:15:26.28 |
+07:52:53.8 |
HIP 54863 |
23.52 |
| 2026-08-14 00:00 |
11:16:18.37 |
+07:47:25.4 |
HIP 55122 |
12.90 |
| 2026-08-14 12:00 |
11:17:10.47 |
+07:41:56.6 |
HIP 55122 |
2.81 |
| 2026-08-15 00:00 |
11:18:02.59 |
+07:36:27.3 |
HIP 55122 |
15.58 |
| 2026-08-15 12:00 |
11:18:54.73 |
+07:30:57.6 |
HIP 55337 |
15.73 |
| 2026-08-16 00:00 |
11:19:46.88 |
+07:25:27.4 |
HIP 55337 |
9.54 |
| 2026-08-16 12:00 |
11:20:39.04 |
+07:19:56.9 |
HIP 55427 |
17.09 |
| 2026-08-17 00:00 |
11:21:31.22 |
+07:14:26.0 |
HIP 55427 |
12.74 |
| 2026-08-17 12:00 |
11:22:23.41 |
+07:08:54.6 |
HIP 55605 |
18.04 |
| 2026-08-18 00:00 |
11:23:15.62 |
+07:03:22.9 |
HIP 55605 |
3.97 |
| 2026-08-18 12:00 |
11:24:07.84 |
+06:57:50.8 |
HIP 55605 |
10.14 |
| 2026-08-19 00:00 |
11:25:00.07 |
+06:52:18.4 |
HIP 55605 |
24.24 |