メタデータ
| 項目 |
値 |
| Designation |
C/2013 G3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-11-15T04:36:22.164480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:32Z |
| Obs used |
902 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
12.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-06-16.0000000 |
| e |
1.00046366 |
| q (au) |
3.852198 |
| a (au) |
-8308.154934 |
| i (deg) |
64.671516 |
| Ω (om, deg) |
208.130504 |
| ω (w, deg) |
76.495501 |
| M (ma, deg) |
-0.000198 |
等級
散乱 + 全体線形
$$
M_a = (6.310 + 4.874\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.310 |
| n |
4.874 |
| gf |
0.980 |
| gb |
-0.500 |
| 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 |
03:12:25.20 |
-09:30:37.0 |
HIP 15002 |
32.43 |
| 2026-05-12 12:00 |
03:12:29.92 |
-09:30:26.6 |
HIP 15002 |
32.10 |
| 2026-05-13 00:00 |
03:12:34.64 |
-09:30:16.5 |
HIP 15084 |
31.13 |
| 2026-05-13 12:00 |
03:12:39.36 |
-09:30:06.6 |
HIP 15084 |
30.10 |
| 2026-05-14 00:00 |
03:12:44.07 |
-09:29:56.9 |
HIP 15084 |
29.09 |
| 2026-05-14 12:00 |
03:12:48.79 |
-09:29:47.6 |
HIP 15084 |
28.08 |
| 2026-05-15 00:00 |
03:12:53.50 |
-09:29:38.5 |
HIP 15084 |
27.09 |
| 2026-05-15 12:00 |
03:12:58.21 |
-09:29:29.7 |
HIP 15084 |
26.11 |
| 2026-05-16 00:00 |
03:13:02.92 |
-09:29:21.1 |
HIP 15084 |
25.15 |
| 2026-05-16 12:00 |
03:13:07.62 |
-09:29:12.8 |
HIP 15084 |
24.20 |
| 2026-05-17 00:00 |
03:13:12.32 |
-09:29:04.8 |
HIP 15084 |
23.27 |
| 2026-05-17 12:00 |
03:13:17.02 |
-09:28:57.1 |
HIP 15084 |
22.36 |
| 2026-05-18 00:00 |
03:13:21.71 |
-09:28:49.6 |
HIP 15084 |
21.47 |
| 2026-05-18 12:00 |
03:13:26.40 |
-09:28:42.4 |
HIP 15084 |
20.61 |
| 2026-05-19 00:00 |
03:13:31.09 |
-09:28:35.4 |
HIP 15084 |
19.78 |
| 2026-05-19 12:00 |
03:13:35.77 |
-09:28:28.8 |
HIP 15084 |
18.98 |
| 2026-05-20 00:00 |
03:13:40.45 |
-09:28:22.4 |
HIP 15084 |
18.22 |
| 2026-05-20 12:00 |
03:13:45.12 |
-09:28:16.3 |
HIP 15084 |
17.49 |
| 2026-05-21 00:00 |
03:13:49.78 |
-09:28:10.5 |
HIP 15084 |
16.82 |
| 2026-05-21 12:00 |
03:13:54.44 |
-09:28:04.9 |
HIP 15084 |
16.19 |
| 2026-05-22 00:00 |
03:13:59.09 |
-09:27:59.6 |
HIP 15084 |
15.62 |
| 2026-05-22 12:00 |
03:14:03.74 |
-09:27:54.6 |
HIP 15084 |
15.12 |
| 2026-05-23 00:00 |
03:14:08.38 |
-09:27:49.9 |
HIP 15084 |
14.68 |
| 2026-05-23 12:00 |
03:14:13.01 |
-09:27:45.5 |
HIP 15084 |
14.32 |
| 2026-05-24 00:00 |
03:14:17.64 |
-09:27:41.3 |
HIP 15084 |
14.04 |
| 2026-05-24 12:00 |
03:14:22.25 |
-09:27:37.4 |
HIP 15084 |
13.84 |
| 2026-05-25 00:00 |
03:14:26.86 |
-09:27:33.8 |
HIP 15084 |
13.73 |
| 2026-05-25 12:00 |
03:14:31.46 |
-09:27:30.5 |
HIP 15084 |
13.71 |
| 2026-05-26 00:00 |
03:14:36.06 |
-09:27:27.4 |
HIP 15084 |
13.78 |
| 2026-05-26 12:00 |
03:14:40.64 |
-09:27:24.6 |
HIP 15084 |
13.94 |
| 2026-05-27 00:00 |
03:14:45.22 |
-09:27:22.2 |
HIP 15084 |
14.18 |
| 2026-05-27 12:00 |
03:14:49.79 |
-09:27:19.9 |
HIP 15084 |
14.49 |
| 2026-05-28 00:00 |
03:14:54.34 |
-09:27:18.0 |
HIP 15084 |
14.89 |
| 2026-05-28 12:00 |
03:14:58.89 |
-09:27:16.4 |
HIP 15084 |
15.35 |
| 2026-05-29 00:00 |
03:15:03.43 |
-09:27:15.0 |
HIP 15084 |
15.87 |
| 2026-05-29 12:00 |
03:15:07.96 |
-09:27:13.9 |
HIP 15084 |
16.44 |
| 2026-05-30 00:00 |
03:15:12.48 |
-09:27:13.1 |
HIP 15084 |
17.07 |
| 2026-05-30 12:00 |
03:15:16.99 |
-09:27:12.6 |
HIP 15084 |
17.73 |
| 2026-05-31 00:00 |
03:15:21.48 |
-09:27:12.4 |
HIP 15084 |
18.44 |
| 2026-05-31 12:00 |
03:15:25.97 |
-09:27:12.4 |
HIP 15084 |
19.17 |
| 2026-06-01 00:00 |
03:15:30.44 |
-09:27:12.8 |
HIP 15084 |
19.94 |
| 2026-06-01 12:00 |
03:15:34.91 |
-09:27:13.4 |
HIP 15084 |
20.73 |
| 2026-06-02 00:00 |
03:15:39.36 |
-09:27:14.3 |
HIP 15084 |
21.54 |