メタデータ
| 項目 |
値 |
| Designation |
C/2014 A5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-08-13T12:40:53.086080Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:06Z |
| Obs used |
42 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
17.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-08-21.0000000 |
| e |
0.96039227 |
| q (au) |
4.800361 |
| a (au) |
121.197575 |
| i (deg) |
31.993327 |
| Ω (om, deg) |
310.103183 |
| ω (w, deg) |
182.581087 |
| M (ma, deg) |
0.005519 |
等級
散乱 + 全体線形
$$
M_a = (9.124 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.124 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.615 |
| k |
0.800 |
| δ90 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
17:40:12.18 |
-46:49:29.5 |
HIP 86552 |
12.40 |
| 2026-07-29 12:00 |
17:40:07.62 |
-46:49:05.0 |
HIP 86552 |
13.28 |
| 2026-07-30 00:00 |
17:40:03.11 |
-46:48:40.3 |
HIP 86552 |
14.15 |
| 2026-07-30 12:00 |
17:39:58.64 |
-46:48:15.5 |
HIP 86552 |
15.02 |
| 2026-07-31 00:00 |
17:39:54.21 |
-46:47:50.5 |
HIP 86552 |
15.89 |
| 2026-07-31 12:00 |
17:39:49.83 |
-46:47:25.3 |
HIP 86552 |
16.74 |
| 2026-08-01 00:00 |
17:39:45.49 |
-46:47:00.0 |
HIP 86552 |
17.60 |
| 2026-08-01 12:00 |
17:39:41.20 |
-46:46:34.5 |
HIP 86552 |
18.45 |
| 2026-08-02 00:00 |
17:39:36.95 |
-46:46:08.8 |
HIP 86552 |
19.29 |
| 2026-08-02 12:00 |
17:39:32.75 |
-46:45:43.0 |
HIP 86295 |
19.40 |
| 2026-08-03 00:00 |
17:39:28.60 |
-46:45:17.1 |
HIP 86295 |
18.56 |
| 2026-08-03 12:00 |
17:39:24.49 |
-46:44:50.9 |
HIP 86295 |
17.74 |
| 2026-08-04 00:00 |
17:39:20.43 |
-46:44:24.7 |
HIP 86295 |
16.91 |
| 2026-08-04 12:00 |
17:39:16.41 |
-46:43:58.2 |
HIP 86295 |
16.10 |
| 2026-08-05 00:00 |
17:39:12.44 |
-46:43:31.6 |
HIP 86295 |
15.29 |
| 2026-08-05 12:00 |
17:39:08.53 |
-46:43:04.9 |
HIP 86295 |
14.48 |
| 2026-08-06 00:00 |
17:39:04.65 |
-46:42:38.1 |
HIP 86295 |
13.68 |
| 2026-08-06 12:00 |
17:39:00.83 |
-46:42:11.1 |
HIP 86295 |
12.89 |
| 2026-08-07 00:00 |
17:38:57.06 |
-46:41:43.9 |
HIP 86295 |
12.10 |
| 2026-08-07 12:00 |
17:38:53.33 |
-46:41:16.6 |
HIP 86295 |
11.31 |
| 2026-08-08 00:00 |
17:38:49.66 |
-46:40:49.2 |
HIP 86295 |
10.54 |
| 2026-08-08 12:00 |
17:38:46.03 |
-46:40:21.6 |
HIP 86295 |
9.76 |
| 2026-08-09 00:00 |
17:38:42.46 |
-46:39:54.0 |
HIP 86295 |
9.00 |
| 2026-08-09 12:00 |
17:38:38.93 |
-46:39:26.1 |
HIP 86295 |
8.24 |
| 2026-08-10 00:00 |
17:38:35.46 |
-46:38:58.2 |
HIP 86295 |
7.49 |
| 2026-08-10 12:00 |
17:38:32.04 |
-46:38:30.1 |
HIP 86295 |
6.75 |
| 2026-08-11 00:00 |
17:38:28.66 |
-46:38:02.0 |
HIP 86295 |
6.01 |
| 2026-08-11 12:00 |
17:38:25.34 |
-46:37:33.6 |
HIP 86295 |
5.28 |
| 2026-08-12 00:00 |
17:38:22.08 |
-46:37:05.2 |
HIP 86295 |
4.57 |
| 2026-08-12 12:00 |
17:38:18.86 |
-46:36:36.7 |
HIP 86295 |
3.87 |
| 2026-08-13 00:00 |
17:38:15.70 |
-46:36:08.0 |
HIP 86295 |
3.19 |
| 2026-08-13 12:00 |
17:38:12.59 |
-46:35:39.3 |
HIP 86295 |
2.55 |
| 2026-08-14 00:00 |
17:38:09.53 |
-46:35:10.4 |
HIP 86295 |
1.96 |
| 2026-08-14 12:00 |
17:38:06.53 |
-46:34:41.4 |
HIP 86295 |
1.50 |
| 2026-08-15 00:00 |
17:38:03.58 |
-46:34:12.4 |
HIP 86295 |
1.30 |
| 2026-08-15 12:00 |
17:38:00.69 |
-46:33:43.2 |
HIP 86295 |
1.45 |
| 2026-08-16 00:00 |
17:37:57.85 |
-46:33:13.9 |
HIP 86295 |
1.87 |
| 2026-08-16 12:00 |
17:37:55.06 |
-46:32:44.5 |
HIP 86295 |
2.42 |
| 2026-08-17 00:00 |
17:37:52.33 |
-46:32:15.1 |
HIP 86295 |
3.02 |
| 2026-08-17 12:00 |
17:37:49.65 |
-46:31:45.5 |
HIP 86295 |
3.65 |
| 2026-08-18 00:00 |
17:37:47.03 |
-46:31:15.9 |
HIP 86295 |
4.28 |
| 2026-08-18 12:00 |
17:37:44.46 |
-46:30:46.2 |
HIP 86295 |
4.93 |
| 2026-08-19 00:00 |
17:37:41.95 |
-46:30:16.4 |
HIP 86295 |
5.57 |