C/2014 S3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 S3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-08-13T07:42:24.215040Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:07Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
17.500 |
| K1 |
8.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-10-08.0000000 |
| e |
0.97675738 |
| q (au) |
2.049265 |
| a (au) |
88.168442 |
| i (deg) |
169.320625 |
| Ω (om, deg) |
356.051072 |
| ω (w, deg) |
293.142060 |
| M (ma, deg) |
0.066286 |
等級
散乱 + 全体線形
$$
M_a = (16.882 + 3.181\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.882 |
| n |
3.181 |
| gf |
0.994 |
| gb |
-0.558 |
| k |
0.999 |
| δ90 |
9.962 |
| 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) |
| 2026-02-03 00:00 |
18:19:29.04 |
-13:04:08.6 |
HIP 89672 |
25.13 |
| 2026-02-03 12:00 |
18:19:32.26 |
-13:03:59.2 |
HIP 89672 |
25.75 |
| 2026-02-04 00:00 |
18:19:35.46 |
-13:03:49.6 |
HIP 89672 |
26.38 |
| 2026-02-04 12:00 |
18:19:38.63 |
-13:03:40.0 |
HIP 89672 |
27.01 |
| 2026-02-05 00:00 |
18:19:41.78 |
-13:03:30.4 |
HIP 89672 |
27.64 |
| 2026-02-05 12:00 |
18:19:44.90 |
-13:03:20.6 |
HIP 89672 |
28.27 |
| 2026-02-06 00:00 |
18:19:47.99 |
-13:03:10.8 |
HIP 89672 |
28.90 |
| 2026-02-06 12:00 |
18:19:51.06 |
-13:03:00.9 |
HIP 89672 |
29.53 |
| 2026-02-07 00:00 |
18:19:54.10 |
-13:02:51.0 |
HIP 89672 |
30.16 |
| 2026-02-07 12:00 |
18:19:57.11 |
-13:02:41.0 |
HIP 89672 |
30.79 |
| 2026-02-08 00:00 |
18:20:00.10 |
-13:02:30.9 |
HIP 89672 |
31.42 |
| 2026-02-08 12:00 |
18:20:03.06 |
-13:02:20.7 |
HIP 89672 |
32.05 |
| 2026-02-09 00:00 |
18:20:05.99 |
-13:02:10.5 |
HIP 89672 |
32.68 |
| 2026-02-09 12:00 |
18:20:08.90 |
-13:02:00.2 |
HIP 89672 |
33.30 |
| 2026-02-10 00:00 |
18:20:11.77 |
-13:01:49.9 |
HIP 89672 |
33.92 |
| 2026-02-10 12:00 |
18:20:14.62 |
-13:01:39.4 |
HIP 89672 |
34.54 |
| 2026-02-11 00:00 |
18:20:17.44 |
-13:01:29.0 |
HIP 89672 |
35.16 |
| 2026-02-11 12:00 |
18:20:20.23 |
-13:01:18.4 |
HIP 89672 |
35.77 |
| 2026-02-12 00:00 |
18:20:22.99 |
-13:01:07.8 |
HIP 89672 |
36.38 |
| 2026-02-12 12:00 |
18:20:25.73 |
-13:00:57.1 |
HIP 89672 |
36.98 |
| 2026-02-13 00:00 |
18:20:28.43 |
-13:00:46.4 |
HIP 89672 |
37.58 |
| 2026-02-13 12:00 |
18:20:31.10 |
-13:00:35.6 |
HIP 89672 |
38.17 |
| 2026-02-14 00:00 |
18:20:33.74 |
-13:00:24.8 |
HIP 89672 |
38.76 |
| 2026-02-14 12:00 |
18:20:36.35 |
-13:00:13.9 |
HIP 89672 |
39.35 |
| 2026-02-15 00:00 |
18:20:38.94 |
-13:00:02.9 |
HIP 89672 |
39.93 |
| 2026-02-15 12:00 |
18:20:41.49 |
-12:59:51.9 |
HIP 89672 |
40.50 |
| 2026-02-16 00:00 |
18:20:44.00 |
-12:59:40.8 |
HIP 89672 |
41.07 |
| 2026-02-16 12:00 |
18:20:46.49 |
-12:59:29.7 |
HIP 89672 |
41.63 |
| 2026-02-17 00:00 |
18:20:48.95 |
-12:59:18.5 |
HIP 90115 |
41.79 |
| 2026-02-17 12:00 |
18:20:51.37 |
-12:59:07.2 |
HIP 90115 |
41.18 |
| 2026-02-18 00:00 |
18:20:53.77 |
-12:58:55.9 |
HIP 90115 |
40.57 |
| 2026-02-18 12:00 |
18:20:56.13 |
-12:58:44.6 |
HIP 90115 |
39.97 |
| 2026-02-19 00:00 |
18:20:58.45 |
-12:58:33.2 |
HIP 90115 |
39.38 |
| 2026-02-19 12:00 |
18:21:00.75 |
-12:58:21.8 |
HIP 90115 |
38.80 |
| 2026-02-20 00:00 |
18:21:03.01 |
-12:58:10.3 |
HIP 90115 |
38.22 |
| 2026-02-20 12:00 |
18:21:05.24 |
-12:57:58.7 |
HIP 90115 |
37.65 |
| 2026-02-21 00:00 |
18:21:07.43 |
-12:57:47.2 |
HIP 90115 |
37.08 |
| 2026-02-21 12:00 |
18:21:09.60 |
-12:57:35.5 |
HIP 90115 |
36.53 |
| 2026-02-22 00:00 |
18:21:11.72 |
-12:57:23.9 |
HIP 90115 |
35.98 |
| 2026-02-22 12:00 |
18:21:13.82 |
-12:57:12.2 |
HIP 90115 |
35.43 |
| 2026-02-23 00:00 |
18:21:15.88 |
-12:57:00.4 |
HIP 90115 |
34.90 |
| 2026-02-23 12:00 |
18:21:17.90 |
-12:56:48.6 |
HIP 90115 |
34.37 |
| 2026-02-24 00:00 |
18:21:19.90 |
-12:56:36.8 |
HIP 90115 |
33.85 |