メタデータ
| 項目 |
値 |
| Designation |
80P/Peters-Hartley |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-11-10T06:46:41.424960Z |
| Orbit solution date (soln_date, UTC) |
2024-08-26T13:12:38Z |
| Obs used |
179 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
15.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-04-13.0000000 |
| e |
0.59940950 |
| q (au) |
1.611763 |
| a (au) |
4.023467 |
| i (deg) |
29.931105 |
| Ω (om, deg) |
259.844351 |
| ω (w, deg) |
339.165604 |
| M (ma, deg) |
108.045831 |
等級
散乱 + 全体線形
$$
M_a = (11.621 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.621 |
| n |
6.000 |
| gf |
0.872 |
| gb |
-1.000 |
| k |
0.994 |
| δ90 |
1.000 |
| 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) |
| 2026-09-25 00:00 |
04:10:32.24 |
+33:57:14.3 |
HIP 19416 |
17.28 |
| 2026-09-25 12:00 |
04:10:26.70 |
+33:57:23.4 |
HIP 19416 |
16.52 |
| 2026-09-26 00:00 |
04:10:20.98 |
+33:57:31.8 |
HIP 19416 |
15.78 |
| 2026-09-26 12:00 |
04:10:15.07 |
+33:57:39.6 |
HIP 19416 |
15.07 |
| 2026-09-27 00:00 |
04:10:08.96 |
+33:57:46.7 |
HIP 19416 |
14.39 |
| 2026-09-27 12:00 |
04:10:02.66 |
+33:57:53.1 |
HIP 19416 |
13.77 |
| 2026-09-28 00:00 |
04:09:56.18 |
+33:57:58.8 |
HIP 19364 |
12.87 |
| 2026-09-28 12:00 |
04:09:49.50 |
+33:58:03.9 |
HIP 19364 |
11.48 |
| 2026-09-29 00:00 |
04:09:42.63 |
+33:58:08.2 |
HIP 19364 |
10.05 |
| 2026-09-29 12:00 |
04:09:35.57 |
+33:58:11.8 |
HIP 19364 |
8.59 |
| 2026-09-30 00:00 |
04:09:28.32 |
+33:58:14.7 |
HIP 19364 |
7.09 |
| 2026-09-30 12:00 |
04:09:20.89 |
+33:58:16.9 |
HIP 19364 |
5.55 |
| 2026-10-01 00:00 |
04:09:13.26 |
+33:58:18.4 |
HIP 19364 |
3.97 |
| 2026-10-01 12:00 |
04:09:05.44 |
+33:58:19.1 |
HIP 19364 |
2.36 |
| 2026-10-02 00:00 |
04:08:57.44 |
+33:58:19.1 |
HIP 19364 |
0.79 |
| 2026-10-02 12:00 |
04:08:49.24 |
+33:58:18.4 |
HIP 19364 |
1.12 |
| 2026-10-03 00:00 |
04:08:40.86 |
+33:58:16.8 |
HIP 19364 |
2.81 |
| 2026-10-03 12:00 |
04:08:32.29 |
+33:58:14.6 |
HIP 19364 |
4.57 |
| 2026-10-04 00:00 |
04:08:23.54 |
+33:58:11.5 |
HIP 19364 |
6.39 |
| 2026-10-04 12:00 |
04:08:14.59 |
+33:58:07.7 |
HIP 19364 |
8.24 |
| 2026-10-05 00:00 |
04:08:05.47 |
+33:58:03.1 |
HIP 19364 |
10.13 |
| 2026-10-05 12:00 |
04:07:56.15 |
+33:57:57.7 |
HIP 19364 |
12.07 |
| 2026-10-06 00:00 |
04:07:46.65 |
+33:57:51.5 |
HIP 19364 |
14.04 |
| 2026-10-06 12:00 |
04:07:36.97 |
+33:57:44.5 |
HIP 19364 |
16.05 |
| 2026-10-07 00:00 |
04:07:27.10 |
+33:57:36.7 |
HIP 19364 |
18.10 |
| 2026-10-07 12:00 |
04:07:17.05 |
+33:57:28.0 |
HIP 19364 |
20.19 |
| 2026-10-08 00:00 |
04:07:06.82 |
+33:57:18.5 |
HIP 19132 |
18.80 |
| 2026-10-08 12:00 |
04:06:56.41 |
+33:57:08.2 |
HIP 19132 |
17.50 |
| 2026-10-09 00:00 |
04:06:45.81 |
+33:56:57.1 |
HIP 19132 |
16.38 |
| 2026-10-09 12:00 |
04:06:35.04 |
+33:56:45.1 |
HIP 19132 |
15.49 |
| 2026-10-10 00:00 |
04:06:24.09 |
+33:56:32.3 |
HIP 19132 |
14.89 |
| 2026-10-10 12:00 |
04:06:12.97 |
+33:56:18.6 |
HIP 19132 |
14.63 |
| 2026-10-11 00:00 |
04:06:01.66 |
+33:56:04.0 |
HIP 19132 |
14.75 |
| 2026-10-11 12:00 |
04:05:50.19 |
+33:55:48.6 |
HIP 19132 |
15.26 |
| 2026-10-12 00:00 |
04:05:38.53 |
+33:55:32.3 |
HIP 19132 |
16.14 |
| 2026-10-12 12:00 |
04:05:26.71 |
+33:55:15.1 |
HIP 19132 |
17.35 |
| 2026-10-13 00:00 |
04:05:14.72 |
+33:54:57.0 |
HIP 18971 |
16.95 |
| 2026-10-13 12:00 |
04:05:02.55 |
+33:54:38.0 |
HIP 18971 |
14.50 |
| 2026-10-14 00:00 |
04:04:50.22 |
+33:54:18.1 |
HIP 18971 |
12.05 |
| 2026-10-14 12:00 |
04:04:37.72 |
+33:53:57.3 |
HIP 18971 |
9.64 |
| 2026-10-15 00:00 |
04:04:25.06 |
+33:53:35.6 |
HIP 18971 |
7.34 |
| 2026-10-15 12:00 |
04:04:12.23 |
+33:53:13.0 |
HIP 18971 |
5.38 |
| 2026-10-16 00:00 |
04:03:59.24 |
+33:52:49.4 |
HIP 18971 |
4.29 |