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) |
| 2026-05-12 00:00 |
22:30:08.63 |
-04:16:42.9 |
HIP 111009 |
12.45 |
| 2026-05-12 12:00 |
22:30:13.79 |
-04:16:03.9 |
HIP 111009 |
13.37 |
| 2026-05-13 00:00 |
22:30:18.88 |
-04:15:25.4 |
HIP 111009 |
14.37 |
| 2026-05-13 12:00 |
22:30:23.89 |
-04:14:47.2 |
HIP 111009 |
15.41 |
| 2026-05-14 00:00 |
22:30:28.83 |
-04:14:09.5 |
HIP 111009 |
16.49 |
| 2026-05-14 12:00 |
22:30:33.69 |
-04:13:32.2 |
HIP 111009 |
17.59 |
| 2026-05-15 00:00 |
22:30:38.47 |
-04:12:55.3 |
HIP 111009 |
18.71 |
| 2026-05-15 12:00 |
22:30:43.17 |
-04:12:18.8 |
HIP 111009 |
19.84 |
| 2026-05-16 00:00 |
22:30:47.80 |
-04:11:42.7 |
HIP 111009 |
20.97 |
| 2026-05-16 12:00 |
22:30:52.35 |
-04:11:07.0 |
HIP 111238 |
21.32 |
| 2026-05-17 00:00 |
22:30:56.82 |
-04:10:31.8 |
HIP 111238 |
20.08 |
| 2026-05-17 12:00 |
22:31:01.21 |
-04:09:57.0 |
HIP 111238 |
18.85 |
| 2026-05-18 00:00 |
22:31:05.52 |
-04:09:22.6 |
HIP 111238 |
17.65 |
| 2026-05-18 12:00 |
22:31:09.76 |
-04:08:48.7 |
HIP 111238 |
16.47 |
| 2026-05-19 00:00 |
22:31:13.91 |
-04:08:15.2 |
HIP 111238 |
15.31 |
| 2026-05-19 12:00 |
22:31:17.99 |
-04:07:42.1 |
HIP 111238 |
14.18 |
| 2026-05-20 00:00 |
22:31:21.99 |
-04:07:09.5 |
HIP 111238 |
13.07 |
| 2026-05-20 12:00 |
22:31:25.90 |
-04:06:37.3 |
HIP 111238 |
11.99 |
| 2026-05-21 00:00 |
22:31:29.74 |
-04:06:05.6 |
HIP 111238 |
10.94 |
| 2026-05-21 12:00 |
22:31:33.49 |
-04:05:34.3 |
HIP 111238 |
9.92 |
| 2026-05-22 00:00 |
22:31:37.17 |
-04:05:03.4 |
HIP 111238 |
8.93 |
| 2026-05-22 12:00 |
22:31:40.76 |
-04:04:33.0 |
HIP 111238 |
7.98 |
| 2026-05-23 00:00 |
22:31:44.28 |
-04:04:03.1 |
HIP 111238 |
7.07 |
| 2026-05-23 12:00 |
22:31:47.71 |
-04:03:33.6 |
HIP 111238 |
6.21 |
| 2026-05-24 00:00 |
22:31:51.06 |
-04:03:04.5 |
HIP 111238 |
5.42 |
| 2026-05-24 12:00 |
22:31:54.33 |
-04:02:36.0 |
HIP 111238 |
4.70 |
| 2026-05-25 00:00 |
22:31:57.52 |
-04:02:07.9 |
HIP 111238 |
4.10 |
| 2026-05-25 12:00 |
22:32:00.63 |
-04:01:40.2 |
HIP 111238 |
3.65 |
| 2026-05-26 00:00 |
22:32:03.65 |
-04:01:13.0 |
HIP 111238 |
3.38 |
| 2026-05-26 12:00 |
22:32:06.60 |
-04:00:46.3 |
HIP 111238 |
3.34 |
| 2026-05-27 00:00 |
22:32:09.46 |
-04:00:20.0 |
HIP 111238 |
3.52 |
| 2026-05-27 12:00 |
22:32:12.24 |
-03:59:54.2 |
HIP 111238 |
3.86 |
| 2026-05-28 00:00 |
22:32:14.94 |
-03:59:28.9 |
HIP 111238 |
4.32 |
| 2026-05-28 12:00 |
22:32:17.55 |
-03:59:04.0 |
HIP 111238 |
4.85 |
| 2026-05-29 00:00 |
22:32:20.09 |
-03:58:39.7 |
HIP 111238 |
5.43 |
| 2026-05-29 12:00 |
22:32:22.54 |
-03:58:15.8 |
HIP 111238 |
6.03 |
| 2026-05-30 00:00 |
22:32:24.91 |
-03:57:52.3 |
HIP 111238 |
6.64 |
| 2026-05-30 12:00 |
22:32:27.19 |
-03:57:29.4 |
HIP 111238 |
7.25 |
| 2026-05-31 00:00 |
22:32:29.39 |
-03:57:06.9 |
HIP 111238 |
7.85 |
| 2026-05-31 12:00 |
22:32:31.51 |
-03:56:44.9 |
HIP 111238 |
8.45 |
| 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 |