メタデータ
| 項目 |
値 |
| Designation |
P/2014 U4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-08-03T22:12:56.600640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:01Z |
| Obs used |
61 |
| NEO |
- |
| M1 |
19.100 |
| 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) |
2014-10-27.0000000 |
| e |
0.47100403 |
| q (au) |
1.843417 |
| a (au) |
3.484747 |
| i (deg) |
6.456987 |
| Ω (om, deg) |
12.045421 |
| ω (w, deg) |
347.730100 |
| M (ma, deg) |
12.738279 |
等級
散乱 + 全体線形
$$
M_a = (17.883 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.883 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.634 |
| k |
0.800 |
| 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 |
14:50:23.95 |
-22:12:59.3 |
HIP 72565 |
21.44 |
| 2026-07-29 12:00 |
14:50:32.47 |
-22:13:08.1 |
HIP 72565 |
21.59 |
| 2026-07-30 00:00 |
14:50:41.28 |
-22:13:18.1 |
HIP 72565 |
21.91 |
| 2026-07-30 12:00 |
14:50:50.37 |
-22:13:29.4 |
HIP 72565 |
22.42 |
| 2026-07-31 00:00 |
14:50:59.75 |
-22:13:41.8 |
HIP 72565 |
23.13 |
| 2026-07-31 12:00 |
14:51:09.41 |
-22:13:55.3 |
HIP 72565 |
24.03 |
| 2026-08-01 00:00 |
14:51:19.35 |
-22:14:10.1 |
HIP 72565 |
25.12 |
| 2026-08-01 12:00 |
14:51:29.57 |
-22:14:26.0 |
HIP 72565 |
26.40 |
| 2026-08-02 00:00 |
14:51:40.06 |
-22:14:43.1 |
HIP 72565 |
27.85 |
| 2026-08-02 12:00 |
14:51:50.84 |
-22:15:01.3 |
HIP 72565 |
29.47 |
| 2026-08-03 00:00 |
14:52:01.89 |
-22:15:20.7 |
HIP 72565 |
31.25 |
| 2026-08-03 12:00 |
14:52:13.22 |
-22:15:41.3 |
HIP 72565 |
33.17 |
| 2026-08-04 00:00 |
14:52:24.83 |
-22:16:03.0 |
HIP 72565 |
35.23 |
| 2026-08-04 12:00 |
14:52:36.71 |
-22:16:25.9 |
HIP 72878 |
37.07 |
| 2026-08-05 00:00 |
14:52:48.86 |
-22:16:49.9 |
HIP 72878 |
36.36 |
| 2026-08-05 12:00 |
14:53:01.29 |
-22:17:15.0 |
HIP 72878 |
35.86 |
| 2026-08-06 00:00 |
14:53:13.98 |
-22:17:41.3 |
HIP 72878 |
35.60 |
| 2026-08-06 12:00 |
14:53:26.95 |
-22:18:08.7 |
HIP 72878 |
35.59 |
| 2026-08-07 00:00 |
14:53:40.19 |
-22:18:37.2 |
HIP 72878 |
35.87 |
| 2026-08-07 12:00 |
14:53:53.70 |
-22:19:06.8 |
HIP 72878 |
36.43 |
| 2026-08-08 00:00 |
14:54:07.48 |
-22:19:37.6 |
HIP 72878 |
37.28 |
| 2026-08-08 12:00 |
14:54:21.53 |
-22:20:09.4 |
HIP 73101 |
35.35 |
| 2026-08-09 00:00 |
14:54:35.84 |
-22:20:42.4 |
HIP 73101 |
33.11 |
| 2026-08-09 12:00 |
14:54:50.42 |
-22:21:16.5 |
HIP 73101 |
31.03 |
| 2026-08-10 00:00 |
14:55:05.26 |
-22:21:51.6 |
HIP 73101 |
29.18 |
| 2026-08-10 12:00 |
14:55:20.37 |
-22:22:27.9 |
HIP 73101 |
27.64 |
| 2026-08-11 00:00 |
14:55:35.74 |
-22:23:05.2 |
HIP 73101 |
26.47 |
| 2026-08-11 12:00 |
14:55:51.38 |
-22:23:43.6 |
HIP 73101 |
25.76 |
| 2026-08-12 00:00 |
14:56:07.28 |
-22:24:23.1 |
HIP 73181 |
23.54 |
| 2026-08-12 12:00 |
14:56:23.43 |
-22:25:03.7 |
HIP 73181 |
21.33 |
| 2026-08-13 00:00 |
14:56:39.85 |
-22:25:45.3 |
HIP 73181 |
19.58 |
| 2026-08-13 12:00 |
14:56:56.52 |
-22:26:27.9 |
HIP 73181 |
18.49 |
| 2026-08-14 00:00 |
14:57:13.46 |
-22:27:11.6 |
HIP 73181 |
18.20 |
| 2026-08-14 12:00 |
14:57:30.64 |
-22:27:56.3 |
HIP 73287 |
16.66 |
| 2026-08-15 00:00 |
14:57:48.09 |
-22:28:42.1 |
HIP 73287 |
13.02 |
| 2026-08-15 12:00 |
14:58:05.78 |
-22:29:28.9 |
HIP 73287 |
9.72 |
| 2026-08-16 00:00 |
14:58:23.73 |
-22:30:16.7 |
HIP 73287 |
7.34 |
| 2026-08-16 12:00 |
14:58:41.93 |
-22:31:05.5 |
HIP 73289 |
6.99 |
| 2026-08-17 00:00 |
14:59:00.38 |
-22:31:55.3 |
HIP 73289 |
8.94 |
| 2026-08-17 12:00 |
14:59:19.08 |
-22:32:46.0 |
HIP 73289 |
12.24 |
| 2026-08-18 00:00 |
14:59:38.02 |
-22:33:37.8 |
HIP 73289 |
16.14 |
| 2026-08-18 12:00 |
14:59:57.22 |
-22:34:30.5 |
HIP 73442 |
18.15 |
| 2026-08-19 00:00 |
15:00:16.65 |
-22:35:24.2 |
HIP 73442 |
15.88 |