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 |
0.994 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.998 |
| 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 |
08:57:55.01 |
+11:29:26.6 |
HIP 43948 |
15.51 |
| 2026-05-12 12:00 |
08:57:55.10 |
+11:29:30.9 |
HIP 43948 |
15.48 |
| 2026-05-13 00:00 |
08:57:55.23 |
+11:29:34.9 |
HIP 43948 |
15.47 |
| 2026-05-13 12:00 |
08:57:55.40 |
+11:29:38.8 |
HIP 43948 |
15.46 |
| 2026-05-14 00:00 |
08:57:55.61 |
+11:29:42.5 |
HIP 43948 |
15.47 |
| 2026-05-14 12:00 |
08:57:55.85 |
+11:29:46.0 |
HIP 43948 |
15.48 |
| 2026-05-15 00:00 |
08:57:56.13 |
+11:29:49.3 |
HIP 43948 |
15.50 |
| 2026-05-15 12:00 |
08:57:56.45 |
+11:29:52.5 |
HIP 43948 |
15.54 |
| 2026-05-16 00:00 |
08:57:56.80 |
+11:29:55.5 |
HIP 43948 |
15.58 |
| 2026-05-16 12:00 |
08:57:57.19 |
+11:29:58.4 |
HIP 43948 |
15.63 |
| 2026-05-17 00:00 |
08:57:57.61 |
+11:30:01.1 |
HIP 43948 |
15.69 |
| 2026-05-17 12:00 |
08:57:58.08 |
+11:30:03.5 |
HIP 43948 |
15.76 |
| 2026-05-18 00:00 |
08:57:58.57 |
+11:30:05.9 |
HIP 43948 |
15.84 |
| 2026-05-18 12:00 |
08:57:59.11 |
+11:30:08.0 |
HIP 43948 |
15.93 |
| 2026-05-19 00:00 |
08:57:59.68 |
+11:30:10.0 |
HIP 43948 |
16.03 |
| 2026-05-19 12:00 |
08:58:00.29 |
+11:30:11.8 |
HIP 43948 |
16.14 |
| 2026-05-20 00:00 |
08:58:00.93 |
+11:30:13.5 |
HIP 43948 |
16.26 |
| 2026-05-20 12:00 |
08:58:01.60 |
+11:30:14.9 |
HIP 43948 |
16.38 |
| 2026-05-21 00:00 |
08:58:02.32 |
+11:30:16.2 |
HIP 43948 |
16.52 |
| 2026-05-21 12:00 |
08:58:03.06 |
+11:30:17.4 |
HIP 43948 |
16.67 |
| 2026-05-22 00:00 |
08:58:03.85 |
+11:30:18.3 |
HIP 43948 |
16.82 |
| 2026-05-22 12:00 |
08:58:04.66 |
+11:30:19.1 |
HIP 43948 |
16.99 |
| 2026-05-23 00:00 |
08:58:05.52 |
+11:30:19.7 |
HIP 43948 |
17.17 |
| 2026-05-23 12:00 |
08:58:06.40 |
+11:30:20.2 |
HIP 43948 |
17.35 |
| 2026-05-24 00:00 |
08:58:07.32 |
+11:30:20.5 |
HIP 43948 |
17.54 |
| 2026-05-24 12:00 |
08:58:08.28 |
+11:30:20.6 |
HIP 43948 |
17.75 |
| 2026-05-25 00:00 |
08:58:09.26 |
+11:30:20.5 |
HIP 43948 |
17.96 |
| 2026-05-25 12:00 |
08:58:10.29 |
+11:30:20.3 |
HIP 43948 |
18.18 |
| 2026-05-26 00:00 |
08:58:11.34 |
+11:30:19.9 |
HIP 43948 |
18.42 |
| 2026-05-26 12:00 |
08:58:12.43 |
+11:30:19.4 |
HIP 43948 |
18.66 |
| 2026-05-27 00:00 |
08:58:13.55 |
+11:30:18.7 |
HIP 43948 |
18.91 |
| 2026-05-27 12:00 |
08:58:14.71 |
+11:30:17.8 |
HIP 43948 |
19.17 |
| 2026-05-28 00:00 |
08:58:15.89 |
+11:30:16.7 |
HIP 43948 |
19.43 |
| 2026-05-28 12:00 |
08:58:17.12 |
+11:30:15.5 |
HIP 43948 |
19.71 |
| 2026-05-29 00:00 |
08:58:18.37 |
+11:30:14.1 |
HIP 43948 |
20.00 |
| 2026-05-29 12:00 |
08:58:19.65 |
+11:30:12.6 |
HIP 43948 |
20.29 |
| 2026-05-30 00:00 |
08:58:20.97 |
+11:30:10.9 |
HIP 43948 |
20.60 |
| 2026-05-30 12:00 |
08:58:22.32 |
+11:30:09.0 |
HIP 43948 |
20.91 |
| 2026-05-31 00:00 |
08:58:23.70 |
+11:30:07.0 |
HIP 43948 |
21.23 |
| 2026-05-31 12:00 |
08:58:25.11 |
+11:30:04.8 |
HIP 44066 |
21.41 |
| 2026-06-01 00:00 |
08:58:26.56 |
+11:30:02.4 |
HIP 44066 |
21.44 |
| 2026-06-01 12:00 |
08:58:28.03 |
+11:30:00.0 |
HIP 44066 |
21.47 |
| 2026-06-02 00:00 |
08:58:29.54 |
+11:29:57.2 |
HIP 44066 |
21.51 |