メタデータ
| 項目 |
値 |
| Designation |
455P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-07-23T16:02:18.502080Z |
| Orbit solution date (soln_date, UTC) |
2023-02-09T05:35:52Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
31.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2011-08-21T13:23:27.830400Z |
| Discovery magnitude (MPC) |
23.18 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) |
2017-04-11.0000000 |
| e |
0.30420723 |
| q (au) |
2.195173 |
| a (au) |
3.154924 |
| i (deg) |
14.138047 |
| Ω (om, deg) |
146.211575 |
| ω (w, deg) |
237.939928 |
| M (ma, deg) |
341.766645 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 3.420\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
3.420 |
| gf |
0.923 |
| gb |
-0.830 |
| k |
0.981 |
| δ90 |
4.926 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
14:29:35.65 |
+03:52:46.9 |
HIP 70816 |
13.71 |
| 2026-05-12 12:00 |
14:29:15.83 |
+03:54:06.1 |
HIP 70816 |
11.95 |
| 2026-05-13 00:00 |
14:28:56.08 |
+03:55:23.3 |
HIP 70816 |
12.22 |
| 2026-05-13 12:00 |
14:28:36.41 |
+03:56:38.7 |
HIP 70816 |
14.37 |
| 2026-05-14 00:00 |
14:28:16.84 |
+03:57:52.2 |
HIP 70737 |
16.57 |
| 2026-05-14 12:00 |
14:27:57.35 |
+03:59:03.7 |
HIP 70737 |
14.71 |
| 2026-05-15 00:00 |
14:27:37.97 |
+04:00:13.3 |
HIP 70737 |
14.46 |
| 2026-05-15 12:00 |
14:27:18.68 |
+04:01:21.0 |
HIP 70737 |
15.86 |
| 2026-05-16 00:00 |
14:26:59.49 |
+04:02:26.8 |
HIP 70737 |
18.51 |
| 2026-05-16 12:00 |
14:26:40.41 |
+04:03:30.6 |
HIP 70504 |
20.90 |
| 2026-05-17 00:00 |
14:26:21.44 |
+04:04:32.4 |
HIP 70504 |
16.92 |
| 2026-05-17 12:00 |
14:26:02.58 |
+04:05:32.2 |
HIP 70504 |
13.52 |
| 2026-05-18 00:00 |
14:25:43.84 |
+04:06:30.1 |
HIP 70504 |
11.19 |
| 2026-05-18 12:00 |
14:25:25.22 |
+04:07:26.0 |
HIP 70504 |
10.60 |
| 2026-05-19 00:00 |
14:25:06.73 |
+04:08:19.9 |
HIP 70504 |
11.98 |
| 2026-05-19 12:00 |
14:24:48.36 |
+04:09:11.7 |
HIP 70504 |
14.75 |
| 2026-05-20 00:00 |
14:24:30.13 |
+04:10:01.6 |
HIP 70504 |
18.26 |
| 2026-05-20 12:00 |
14:24:12.02 |
+04:10:49.5 |
HIP 70299 |
18.68 |
| 2026-05-21 00:00 |
14:23:54.06 |
+04:11:35.4 |
HIP 70299 |
14.23 |
| 2026-05-21 12:00 |
14:23:36.23 |
+04:12:19.3 |
HIP 70299 |
9.91 |
| 2026-05-22 00:00 |
14:23:18.55 |
+04:13:01.2 |
HIP 70299 |
5.93 |
| 2026-05-22 12:00 |
14:23:01.02 |
+04:13:41.0 |
HIP 70299 |
3.48 |
| 2026-05-23 00:00 |
14:22:43.63 |
+04:14:18.9 |
HIP 70299 |
5.29 |
| 2026-05-23 12:00 |
14:22:26.40 |
+04:14:54.7 |
HIP 70299 |
9.04 |
| 2026-05-24 00:00 |
14:22:09.32 |
+04:15:28.6 |
HIP 70299 |
13.13 |
| 2026-05-24 12:00 |
14:21:52.40 |
+04:16:00.4 |
HIP 70110 |
16.38 |
| 2026-05-25 00:00 |
14:21:35.63 |
+04:16:30.2 |
HIP 70110 |
12.17 |
| 2026-05-25 12:00 |
14:21:19.03 |
+04:16:58.0 |
HIP 70110 |
8.01 |
| 2026-05-26 00:00 |
14:21:02.59 |
+04:17:23.9 |
HIP 70110 |
3.91 |
| 2026-05-26 12:00 |
14:20:46.33 |
+04:17:47.7 |
HIP 70110 |
0.44 |
| 2026-05-27 00:00 |
14:20:30.23 |
+04:18:09.5 |
HIP 70110 |
4.24 |
| 2026-05-27 12:00 |
14:20:14.30 |
+04:18:29.3 |
HIP 70110 |
8.21 |
| 2026-05-28 00:00 |
14:19:58.54 |
+04:18:47.1 |
HIP 70110 |
12.14 |
| 2026-05-28 12:00 |
14:19:42.96 |
+04:19:02.9 |
HIP 69966 |
13.24 |
| 2026-05-29 00:00 |
14:19:27.56 |
+04:19:16.8 |
HIP 69966 |
10.70 |
| 2026-05-29 12:00 |
14:19:12.34 |
+04:19:28.6 |
HIP 69966 |
9.10 |
| 2026-05-30 00:00 |
14:18:57.31 |
+04:19:38.5 |
HIP 69966 |
8.92 |
| 2026-05-30 12:00 |
14:18:42.45 |
+04:19:46.4 |
HIP 69966 |
10.16 |
| 2026-05-31 00:00 |
14:18:27.79 |
+04:19:52.4 |
HIP 69966 |
12.38 |
| 2026-05-31 12:00 |
14:18:13.31 |
+04:19:56.3 |
HIP 69966 |
15.10 |
| 2026-06-01 00:00 |
14:17:59.02 |
+04:19:58.3 |
HIP 69966 |
18.08 |
| 2026-06-01 12:00 |
14:17:44.93 |
+04:19:58.4 |
HIP 69966 |
21.19 |
| 2026-06-02 00:00 |
14:17:31.02 |
+04:19:56.5 |
HIP 69966 |
24.34 |