メタデータ
| 項目 |
値 |
| Designation |
C/2014 G1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-11-06T16:43:34.233600Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:31Z |
| Obs used |
89 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
12.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-03-11.0000000 |
| e |
0.99470139 |
| q (au) |
5.468636 |
| a (au) |
1032.088644 |
| i (deg) |
165.640250 |
| Ω (om, deg) |
337.927549 |
| ω (w, deg) |
77.054859 |
| M (ma, deg) |
0.003695 |
等級
散乱 + 全体線形
$$
M_a = (4.272 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.272 |
| n |
6.000 |
| gf |
1.000 |
| 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) |
| 2026-09-20 00:00 |
09:09:42.91 |
+10:36:48.5 |
HIP 44991 |
7.56 |
| 2026-09-20 12:00 |
09:09:45.43 |
+10:36:30.8 |
HIP 44991 |
7.15 |
| 2026-09-21 00:00 |
09:09:47.92 |
+10:36:13.1 |
HIP 44991 |
6.79 |
| 2026-09-21 12:00 |
09:09:50.39 |
+10:35:55.4 |
HIP 44991 |
6.49 |
| 2026-09-22 00:00 |
09:09:52.84 |
+10:35:37.9 |
HIP 44991 |
6.24 |
| 2026-09-22 12:00 |
09:09:55.26 |
+10:35:20.4 |
HIP 44991 |
6.06 |
| 2026-09-23 00:00 |
09:09:57.65 |
+10:35:03.0 |
HIP 44991 |
5.94 |
| 2026-09-23 12:00 |
09:10:00.02 |
+10:34:45.6 |
HIP 44991 |
5.90 |
| 2026-09-24 00:00 |
09:10:02.37 |
+10:34:28.3 |
HIP 44991 |
5.92 |
| 2026-09-24 12:00 |
09:10:04.69 |
+10:34:11.1 |
HIP 44991 |
6.01 |
| 2026-09-25 00:00 |
09:10:06.98 |
+10:33:54.0 |
HIP 44991 |
6.16 |
| 2026-09-25 12:00 |
09:10:09.25 |
+10:33:36.9 |
HIP 44991 |
6.37 |
| 2026-09-26 00:00 |
09:10:11.50 |
+10:33:19.9 |
HIP 44991 |
6.63 |
| 2026-09-26 12:00 |
09:10:13.72 |
+10:33:03.0 |
HIP 44991 |
6.93 |
| 2026-09-27 00:00 |
09:10:15.91 |
+10:32:46.1 |
HIP 44991 |
7.26 |
| 2026-09-27 12:00 |
09:10:18.07 |
+10:32:29.4 |
HIP 44991 |
7.62 |
| 2026-09-28 00:00 |
09:10:20.21 |
+10:32:12.7 |
HIP 44991 |
8.00 |
| 2026-09-28 12:00 |
09:10:22.32 |
+10:31:56.1 |
HIP 44991 |
8.40 |
| 2026-09-29 00:00 |
09:10:24.41 |
+10:31:39.6 |
HIP 44991 |
8.82 |
| 2026-09-29 12:00 |
09:10:26.46 |
+10:31:23.1 |
HIP 44991 |
9.25 |
| 2026-09-30 00:00 |
09:10:28.49 |
+10:31:06.8 |
HIP 44991 |
9.69 |
| 2026-09-30 12:00 |
09:10:30.49 |
+10:30:50.5 |
HIP 44991 |
10.13 |
| 2026-10-01 00:00 |
09:10:32.47 |
+10:30:34.3 |
HIP 44991 |
10.58 |
| 2026-10-01 12:00 |
09:10:34.41 |
+10:30:18.2 |
HIP 44991 |
11.03 |
| 2026-10-02 00:00 |
09:10:36.33 |
+10:30:02.2 |
HIP 44991 |
11.48 |
| 2026-10-02 12:00 |
09:10:38.22 |
+10:29:46.3 |
HIP 44991 |
11.94 |
| 2026-10-03 00:00 |
09:10:40.08 |
+10:29:30.5 |
HIP 44991 |
12.39 |
| 2026-10-03 12:00 |
09:10:41.91 |
+10:29:14.8 |
HIP 44991 |
12.84 |
| 2026-10-04 00:00 |
09:10:43.71 |
+10:28:59.2 |
HIP 44991 |
13.29 |
| 2026-10-04 12:00 |
09:10:45.49 |
+10:28:43.6 |
HIP 44991 |
13.74 |
| 2026-10-05 00:00 |
09:10:47.23 |
+10:28:28.2 |
HIP 44991 |
14.18 |
| 2026-10-05 12:00 |
09:10:48.94 |
+10:28:12.8 |
HIP 44991 |
14.62 |
| 2026-10-06 00:00 |
09:10:50.63 |
+10:27:57.6 |
HIP 44991 |
15.06 |
| 2026-10-06 12:00 |
09:10:52.28 |
+10:27:42.5 |
HIP 44991 |
15.49 |
| 2026-10-07 00:00 |
09:10:53.90 |
+10:27:27.4 |
HIP 44991 |
15.91 |
| 2026-10-07 12:00 |
09:10:55.49 |
+10:27:12.5 |
HIP 44991 |
16.33 |
| 2026-10-08 00:00 |
09:10:57.06 |
+10:26:57.7 |
HIP 44991 |
16.75 |
| 2026-10-08 12:00 |
09:10:58.59 |
+10:26:43.0 |
HIP 44991 |
17.16 |
| 2026-10-09 00:00 |
09:11:00.08 |
+10:26:28.4 |
HIP 44991 |
17.56 |
| 2026-10-09 12:00 |
09:11:01.55 |
+10:26:13.9 |
HIP 44991 |
17.96 |
| 2026-10-10 00:00 |
09:11:02.99 |
+10:25:59.5 |
HIP 44991 |
18.35 |
| 2026-10-10 12:00 |
09:11:04.39 |
+10:25:45.2 |
HIP 44991 |
18.73 |
| 2026-10-11 00:00 |
09:11:05.76 |
+10:25:31.0 |
HIP 44991 |
19.11 |