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 |
0.874 |
| 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) |
| 2026-03-26 00:00 |
02:35:52.31 |
+29:25:10.8 |
HIP 12115 |
2.78 |
| 2026-03-26 12:00 |
02:36:12.18 |
+29:25:27.9 |
HIP 12115 |
2.12 |
| 2026-03-27 00:00 |
02:36:32.12 |
+29:25:45.6 |
HIP 12115 |
6.25 |
| 2026-03-27 12:00 |
02:36:52.12 |
+29:26:04.0 |
HIP 12115 |
10.57 |
| 2026-03-28 00:00 |
02:37:12.18 |
+29:26:22.9 |
HIP 12115 |
14.94 |
| 2026-03-28 12:00 |
02:37:32.29 |
+29:26:42.4 |
HIP 12115 |
19.32 |
| 2026-03-29 00:00 |
02:37:52.46 |
+29:27:02.4 |
HIP 12115 |
23.72 |
| 2026-03-29 12:00 |
02:38:12.69 |
+29:27:23.1 |
HIP 12115 |
28.13 |
| 2026-03-30 00:00 |
02:38:32.98 |
+29:27:44.3 |
HIP 12452 |
30.46 |
| 2026-03-30 12:00 |
02:38:53.32 |
+29:28:06.1 |
HIP 12452 |
27.02 |
| 2026-03-31 00:00 |
02:39:13.72 |
+29:28:28.4 |
HIP 12452 |
23.90 |
| 2026-03-31 12:00 |
02:39:34.17 |
+29:28:51.3 |
HIP 12452 |
21.24 |
| 2026-04-01 00:00 |
02:39:54.68 |
+29:29:14.7 |
HIP 12452 |
19.25 |
| 2026-04-01 12:00 |
02:40:15.23 |
+29:29:38.7 |
HIP 12452 |
18.16 |
| 2026-04-02 00:00 |
02:40:35.84 |
+29:30:03.2 |
HIP 12452 |
18.13 |
| 2026-04-02 12:00 |
02:40:56.51 |
+29:30:28.2 |
HIP 12452 |
19.18 |
| 2026-04-03 00:00 |
02:41:17.22 |
+29:30:53.8 |
HIP 12452 |
21.16 |
| 2026-04-03 12:00 |
02:41:37.98 |
+29:31:19.9 |
HIP 12452 |
23.85 |
| 2026-04-04 00:00 |
02:41:58.79 |
+29:31:46.5 |
HIP 12452 |
27.04 |
| 2026-04-04 12:00 |
02:42:19.66 |
+29:32:13.6 |
HIP 12808 |
30.20 |
| 2026-04-05 00:00 |
02:42:40.57 |
+29:32:41.2 |
HIP 12808 |
25.80 |
| 2026-04-05 12:00 |
02:43:01.52 |
+29:33:09.3 |
HIP 12808 |
21.46 |
| 2026-04-06 00:00 |
02:43:22.53 |
+29:33:37.9 |
HIP 12808 |
17.24 |
| 2026-04-06 12:00 |
02:43:43.58 |
+29:34:07.0 |
HIP 12808 |
13.28 |
| 2026-04-07 00:00 |
02:44:04.68 |
+29:34:36.6 |
HIP 12808 |
9.89 |
| 2026-04-07 12:00 |
02:44:25.82 |
+29:35:06.7 |
HIP 12808 |
7.87 |
| 2026-04-08 00:00 |
02:44:47.01 |
+29:35:37.3 |
HIP 12808 |
8.30 |
| 2026-04-08 12:00 |
02:45:08.24 |
+29:36:08.3 |
HIP 12808 |
10.92 |
| 2026-04-09 00:00 |
02:45:29.51 |
+29:36:39.8 |
HIP 12808 |
14.60 |
| 2026-04-09 12:00 |
02:45:50.83 |
+29:37:11.8 |
HIP 12808 |
18.73 |
| 2026-04-10 00:00 |
02:46:12.19 |
+29:37:44.2 |
HIP 13047 |
19.01 |
| 2026-04-10 12:00 |
02:46:33.59 |
+29:38:17.0 |
HIP 13047 |
14.33 |
| 2026-04-11 00:00 |
02:46:55.03 |
+29:38:50.4 |
HIP 13047 |
9.65 |
| 2026-04-11 12:00 |
02:47:16.51 |
+29:39:24.1 |
HIP 13047 |
4.98 |
| 2026-04-12 00:00 |
02:47:38.03 |
+29:39:58.4 |
HIP 13047 |
0.75 |
| 2026-04-12 12:00 |
02:47:59.59 |
+29:40:33.0 |
HIP 13047 |
4.56 |
| 2026-04-13 00:00 |
02:48:21.19 |
+29:41:08.1 |
HIP 13047 |
9.26 |
| 2026-04-13 12:00 |
02:48:42.82 |
+29:41:43.6 |
HIP 13047 |
13.98 |
| 2026-04-14 00:00 |
02:49:04.49 |
+29:42:19.5 |
HIP 13047 |
18.72 |
| 2026-04-14 12:00 |
02:49:26.20 |
+29:42:55.9 |
HIP 13047 |
23.47 |
| 2026-04-15 00:00 |
02:49:47.94 |
+29:43:32.6 |
HIP 13047 |
28.23 |
| 2026-04-15 12:00 |
02:50:09.71 |
+29:44:09.8 |
HIP 13047 |
32.99 |
| 2026-04-16 00:00 |
02:50:31.52 |
+29:44:47.4 |
HIP 13291 |
33.18 |