メタデータ
| 項目 |
値 |
| Designation |
P/2016 A3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-04-13T17:31:26.886720Z |
| Orbit solution date (soln_date, UTC) |
2022-07-31T01:43:22Z |
| Obs used |
198 |
| NEO |
- |
| M1 |
4.300 |
| K1 |
17.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-05-17.0000000 |
| e |
0.38019712 |
| q (au) |
4.789503 |
| a (au) |
7.727462 |
| i (deg) |
8.593880 |
| Ω (om, deg) |
187.794592 |
| ω (w, deg) |
338.486358 |
| M (ma, deg) |
1.526509 |
等級
散乱 + 全体線形
$$
M_a = (5.010 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.010 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.971 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
22:32:33.55 |
-03:56:23.5 |
HIP 111238 |
9.03 |
| 2026-06-01 12:00 |
22:32:35.50 |
-03:56:02.4 |
HIP 111238 |
9.60 |
| 2026-06-02 00:00 |
22:32:37.37 |
-03:55:41.9 |
HIP 111238 |
10.15 |
| 2026-06-02 12:00 |
22:32:39.15 |
-03:55:21.9 |
HIP 111238 |
10.69 |
| 2026-06-03 00:00 |
22:32:40.86 |
-03:55:02.4 |
HIP 111238 |
11.21 |
| 2026-06-03 12:00 |
22:32:42.47 |
-03:54:43.3 |
HIP 111238 |
11.71 |
| 2026-06-04 00:00 |
22:32:44.01 |
-03:54:24.8 |
HIP 111238 |
12.19 |
| 2026-06-04 12:00 |
22:32:45.46 |
-03:54:06.7 |
HIP 111238 |
12.66 |
| 2026-06-05 00:00 |
22:32:46.82 |
-03:53:49.2 |
HIP 111238 |
13.10 |
| 2026-06-05 12:00 |
22:32:48.10 |
-03:53:32.1 |
HIP 111238 |
13.52 |
| 2026-06-06 00:00 |
22:32:49.30 |
-03:53:15.6 |
HIP 111238 |
13.93 |
| 2026-06-06 12:00 |
22:32:50.41 |
-03:52:59.5 |
HIP 111238 |
14.31 |
| 2026-06-07 00:00 |
22:32:51.43 |
-03:52:44.0 |
HIP 111238 |
14.67 |
| 2026-06-07 12:00 |
22:32:52.38 |
-03:52:29.0 |
HIP 111238 |
15.02 |
| 2026-06-08 00:00 |
22:32:53.23 |
-03:52:14.5 |
HIP 111238 |
15.34 |
| 2026-06-08 12:00 |
22:32:54.00 |
-03:52:00.5 |
HIP 111238 |
15.64 |
| 2026-06-09 00:00 |
22:32:54.69 |
-03:51:47.0 |
HIP 111238 |
15.92 |
| 2026-06-09 12:00 |
22:32:55.29 |
-03:51:34.0 |
HIP 111238 |
16.19 |
| 2026-06-10 00:00 |
22:32:55.81 |
-03:51:21.6 |
HIP 111238 |
16.43 |
| 2026-06-10 12:00 |
22:32:56.24 |
-03:51:09.6 |
HIP 111238 |
16.65 |
| 2026-06-11 00:00 |
22:32:56.58 |
-03:50:58.2 |
HIP 111238 |
16.85 |
| 2026-06-11 12:00 |
22:32:56.84 |
-03:50:47.3 |
HIP 111238 |
17.03 |
| 2026-06-12 00:00 |
22:32:57.01 |
-03:50:37.0 |
HIP 111238 |
17.19 |
| 2026-06-12 12:00 |
22:32:57.10 |
-03:50:27.1 |
HIP 111238 |
17.33 |
| 2026-06-13 00:00 |
22:32:57.10 |
-03:50:17.8 |
HIP 111238 |
17.45 |
| 2026-06-13 12:00 |
22:32:57.02 |
-03:50:09.0 |
HIP 111238 |
17.55 |
| 2026-06-14 00:00 |
22:32:56.85 |
-03:50:00.8 |
HIP 111238 |
17.63 |
| 2026-06-14 12:00 |
22:32:56.59 |
-03:49:53.1 |
HIP 111238 |
17.69 |
| 2026-06-15 00:00 |
22:32:56.25 |
-03:49:45.9 |
HIP 111238 |
17.73 |
| 2026-06-15 12:00 |
22:32:55.83 |
-03:49:39.3 |
HIP 111238 |
17.75 |
| 2026-06-16 00:00 |
22:32:55.31 |
-03:49:33.1 |
HIP 111238 |
17.76 |
| 2026-06-16 12:00 |
22:32:54.72 |
-03:49:27.6 |
HIP 111238 |
17.74 |
| 2026-06-17 00:00 |
22:32:54.03 |
-03:49:22.5 |
HIP 111238 |
17.71 |
| 2026-06-17 12:00 |
22:32:53.26 |
-03:49:18.0 |
HIP 111238 |
17.66 |
| 2026-06-18 00:00 |
22:32:52.41 |
-03:49:14.0 |
HIP 111238 |
17.59 |
| 2026-06-18 12:00 |
22:32:51.47 |
-03:49:10.6 |
HIP 111238 |
17.51 |
| 2026-06-19 00:00 |
22:32:50.45 |
-03:49:07.7 |
HIP 111238 |
17.41 |
| 2026-06-19 12:00 |
22:32:49.34 |
-03:49:05.3 |
HIP 111238 |
17.30 |
| 2026-06-20 00:00 |
22:32:48.15 |
-03:49:03.5 |
HIP 111238 |
17.17 |
| 2026-06-20 12:00 |
22:32:46.87 |
-03:49:02.2 |
HIP 111238 |
17.02 |
| 2026-06-21 00:00 |
22:32:45.51 |
-03:49:01.5 |
HIP 111238 |
16.87 |
| 2026-06-21 12:00 |
22:32:44.06 |
-03:49:01.3 |
HIP 111238 |
16.70 |
| 2026-06-22 00:00 |
22:32:42.53 |
-03:49:01.6 |
HIP 111238 |
16.52 |