メタデータ
| 項目 |
値 |
| Designation |
344P/Read |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-01-10T17:39:03.035520Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:48Z |
| Obs used |
535 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
25.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-12-08.0000000 |
| e |
0.42197889 |
| q (au) |
2.824924 |
| a (au) |
4.887234 |
| i (deg) |
3.483249 |
| Ω (om, deg) |
273.290163 |
| ω (w, deg) |
140.373304 |
| M (ma, deg) |
163.497658 |
等級
散乱 + 全体線形
$$
M_a = (15.246 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.246 |
| n |
2.000 |
| gf |
0.984 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.997 |
| 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 |
22:46:45.59 |
-04:52:13.4 |
HIP 112309 |
27.82 |
| 2026-05-12 12:00 |
22:47:09.12 |
-04:49:24.2 |
HIP 112617 |
25.18 |
| 2026-05-13 00:00 |
22:47:32.54 |
-04:46:35.4 |
HIP 112617 |
18.85 |
| 2026-05-13 12:00 |
22:47:55.85 |
-04:43:47.0 |
HIP 112617 |
12.69 |
| 2026-05-14 00:00 |
22:48:19.04 |
-04:40:59.2 |
HIP 112617 |
7.08 |
| 2026-05-14 12:00 |
22:48:42.12 |
-04:38:11.8 |
HIP 112617 |
4.64 |
| 2026-05-15 00:00 |
22:49:05.07 |
-04:35:25.0 |
HIP 112617 |
8.61 |
| 2026-05-15 12:00 |
22:49:27.91 |
-04:32:38.6 |
HIP 112617 |
14.38 |
| 2026-05-16 00:00 |
22:49:50.62 |
-04:29:52.7 |
HIP 112617 |
20.46 |
| 2026-05-16 12:00 |
22:50:13.21 |
-04:27:07.4 |
HIP 112617 |
26.60 |
| 2026-05-17 00:00 |
22:50:35.68 |
-04:24:22.5 |
HIP 112617 |
32.77 |
| 2026-05-17 12:00 |
22:50:58.03 |
-04:21:38.2 |
HIP 112617 |
38.92 |
| 2026-05-18 00:00 |
22:51:20.26 |
-04:18:54.5 |
HIP 113056 |
41.33 |
| 2026-05-18 12:00 |
22:51:42.35 |
-04:16:11.3 |
HIP 113091 |
38.24 |
| 2026-05-19 00:00 |
22:52:04.32 |
-04:13:28.6 |
HIP 113091 |
33.89 |
| 2026-05-19 12:00 |
22:52:26.17 |
-04:10:46.5 |
HIP 113091 |
30.17 |
| 2026-05-20 00:00 |
22:52:47.88 |
-04:08:05.0 |
HIP 113091 |
27.33 |
| 2026-05-20 12:00 |
22:53:09.47 |
-04:05:24.0 |
HIP 113091 |
25.64 |
| 2026-05-21 00:00 |
22:53:30.93 |
-04:02:43.6 |
HIP 113091 |
25.31 |
| 2026-05-21 12:00 |
22:53:52.25 |
-04:00:03.9 |
HIP 113091 |
26.36 |
| 2026-05-22 00:00 |
22:54:13.45 |
-03:57:24.7 |
HIP 113091 |
28.62 |
| 2026-05-22 12:00 |
22:54:34.51 |
-03:54:46.1 |
HIP 113091 |
31.82 |
| 2026-05-23 00:00 |
22:54:55.44 |
-03:52:08.1 |
HIP 113303 |
33.84 |
| 2026-05-23 12:00 |
22:55:16.24 |
-03:49:30.8 |
HIP 113303 |
28.15 |
| 2026-05-24 00:00 |
22:55:36.90 |
-03:46:54.0 |
HIP 113303 |
22.54 |
| 2026-05-24 12:00 |
22:55:57.42 |
-03:44:17.9 |
HIP 113303 |
17.08 |
| 2026-05-25 00:00 |
22:56:17.81 |
-03:41:42.4 |
HIP 113303 |
11.93 |
| 2026-05-25 12:00 |
22:56:38.06 |
-03:39:07.6 |
HIP 113303 |
7.62 |
| 2026-05-26 00:00 |
22:56:58.18 |
-03:36:33.4 |
HIP 113303 |
6.18 |
| 2026-05-26 12:00 |
22:57:18.15 |
-03:33:59.9 |
HIP 113303 |
9.01 |
| 2026-05-27 00:00 |
22:57:37.98 |
-03:31:27.0 |
HIP 113391 |
8.60 |
| 2026-05-27 12:00 |
22:57:57.68 |
-03:28:54.8 |
HIP 113391 |
10.40 |
| 2026-05-28 00:00 |
22:58:17.23 |
-03:26:23.3 |
HIP 113391 |
14.25 |
| 2026-05-28 12:00 |
22:58:36.64 |
-03:23:52.5 |
HIP 113391 |
18.89 |
| 2026-05-29 00:00 |
22:58:55.90 |
-03:21:22.3 |
HIP 113391 |
23.85 |
| 2026-05-29 12:00 |
22:59:15.02 |
-03:18:52.9 |
HIP 113523 |
25.99 |
| 2026-05-30 00:00 |
22:59:34.00 |
-03:16:24.1 |
HIP 113523 |
23.30 |
| 2026-05-30 12:00 |
22:59:52.82 |
-03:13:56.1 |
HIP 113523 |
21.62 |
| 2026-05-31 00:00 |
23:00:11.50 |
-03:11:28.8 |
HIP 113555 |
20.32 |
| 2026-05-31 12:00 |
23:00:30.03 |
-03:09:02.2 |
HIP 113555 |
19.27 |
| 2026-06-01 00:00 |
23:00:48.42 |
-03:06:36.3 |
HIP 113555 |
19.59 |
| 2026-06-01 12:00 |
23:01:06.65 |
-03:04:11.2 |
HIP 113555 |
21.20 |
| 2026-06-02 00:00 |
23:01:24.73 |
-03:01:46.9 |
HIP 113727 |
22.00 |