80P/Peters-Hartley
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) |
| 2026-02-03 00:00 |
02:09:59.64 |
+30:05:31.3 |
HIP 10169 |
10.20 |
| 2026-02-03 12:00 |
02:10:08.78 |
+30:04:19.2 |
HIP 10169 |
8.19 |
| 2026-02-04 00:00 |
02:10:18.07 |
+30:03:08.1 |
HIP 10169 |
6.37 |
| 2026-02-04 12:00 |
02:10:27.51 |
+30:01:58.1 |
HIP 10169 |
4.95 |
| 2026-02-05 00:00 |
02:10:37.10 |
+30:00:49.2 |
HIP 10169 |
4.39 |
| 2026-02-05 12:00 |
02:10:46.84 |
+29:59:41.3 |
HIP 10169 |
5.01 |
| 2026-02-06 00:00 |
02:10:56.73 |
+29:58:34.6 |
HIP 10169 |
6.50 |
| 2026-02-06 12:00 |
02:11:06.76 |
+29:57:28.8 |
HIP 10169 |
8.43 |
| 2026-02-07 00:00 |
02:11:16.94 |
+29:56:24.2 |
HIP 10169 |
10.58 |
| 2026-02-07 12:00 |
02:11:27.26 |
+29:55:20.6 |
HIP 10199 |
12.28 |
| 2026-02-08 00:00 |
02:11:37.72 |
+29:54:18.1 |
HIP 10199 |
14.12 |
| 2026-02-08 12:00 |
02:11:48.33 |
+29:53:16.6 |
HIP 10199 |
16.14 |
| 2026-02-09 00:00 |
02:11:59.08 |
+29:52:16.2 |
HIP 10199 |
18.29 |
| 2026-02-09 12:00 |
02:12:09.97 |
+29:51:16.9 |
HIP 10199 |
20.53 |
| 2026-02-10 00:00 |
02:12:21.00 |
+29:50:18.6 |
HIP 10199 |
22.85 |
| 2026-02-10 12:00 |
02:12:32.17 |
+29:49:21.4 |
HIP 10344 |
22.69 |
| 2026-02-11 00:00 |
02:12:43.48 |
+29:48:25.2 |
HIP 10344 |
20.90 |
| 2026-02-11 12:00 |
02:12:54.92 |
+29:47:30.0 |
HIP 10344 |
19.31 |
| 2026-02-12 00:00 |
02:13:06.50 |
+29:46:35.9 |
HIP 10344 |
17.99 |
| 2026-02-12 12:00 |
02:13:18.22 |
+29:45:42.9 |
HIP 10344 |
17.02 |
| 2026-02-13 00:00 |
02:13:30.07 |
+29:44:50.8 |
HIP 10344 |
16.45 |
| 2026-02-13 12:00 |
02:13:42.06 |
+29:43:59.8 |
HIP 10344 |
16.35 |
| 2026-02-14 00:00 |
02:13:54.18 |
+29:43:09.9 |
HIP 10344 |
16.73 |
| 2026-02-14 12:00 |
02:14:06.43 |
+29:42:20.9 |
HIP 10344 |
17.58 |
| 2026-02-15 00:00 |
02:14:18.81 |
+29:41:33.0 |
HIP 10344 |
18.84 |
| 2026-02-15 12:00 |
02:14:31.33 |
+29:40:46.1 |
HIP 10344 |
20.44 |
| 2026-02-16 00:00 |
02:14:43.97 |
+29:40:00.3 |
HIP 10344 |
22.32 |
| 2026-02-16 12:00 |
02:14:56.74 |
+29:39:15.4 |
HIP 10598 |
21.57 |
| 2026-02-17 00:00 |
02:15:09.64 |
+29:38:31.6 |
HIP 10598 |
19.42 |
| 2026-02-17 12:00 |
02:15:22.67 |
+29:37:48.7 |
HIP 10598 |
17.46 |
| 2026-02-18 00:00 |
02:15:35.82 |
+29:37:06.9 |
HIP 10598 |
15.76 |
| 2026-02-18 12:00 |
02:15:49.09 |
+29:36:26.0 |
HIP 10598 |
14.44 |
| 2026-02-19 00:00 |
02:16:02.49 |
+29:35:46.2 |
HIP 10598 |
13.61 |
| 2026-02-19 12:00 |
02:16:16.02 |
+29:35:07.3 |
HIP 10598 |
13.39 |
| 2026-02-20 00:00 |
02:16:29.66 |
+29:34:29.4 |
HIP 10598 |
13.82 |
| 2026-02-20 12:00 |
02:16:43.43 |
+29:33:52.5 |
HIP 10598 |
14.86 |
| 2026-02-21 00:00 |
02:16:57.31 |
+29:33:16.6 |
HIP 10598 |
16.41 |
| 2026-02-21 12:00 |
02:17:11.31 |
+29:32:41.6 |
HIP 10598 |
18.34 |
| 2026-02-22 00:00 |
02:17:25.43 |
+29:32:07.6 |
HIP 10598 |
20.56 |
| 2026-02-22 12:00 |
02:17:39.67 |
+29:31:34.6 |
HIP 10731 |
20.14 |
| 2026-02-23 00:00 |
02:17:54.02 |
+29:31:02.5 |
HIP 10731 |
19.99 |
| 2026-02-23 12:00 |
02:18:08.49 |
+29:30:31.4 |
HIP 10731 |
20.32 |
| 2026-02-24 00:00 |
02:18:23.07 |
+29:30:01.2 |
HIP 10731 |
21.12 |