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
$$
M_a = (15.247 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.247 |
| n |
2.000 |
| gf |
0.966 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
23:01:42.65 |
-02:59:23.3 |
HIP 113727 |
18.50 |
| 2026-06-03 00:00 |
23:02:00.42 |
-02:57:00.5 |
HIP 113727 |
15.90 |
| 2026-06-03 12:00 |
23:02:18.04 |
-02:54:38.4 |
HIP 113727 |
14.62 |
| 2026-06-04 00:00 |
23:02:35.50 |
-02:52:17.2 |
HIP 113727 |
14.97 |
| 2026-06-04 12:00 |
23:02:52.80 |
-02:49:56.7 |
HIP 113727 |
16.81 |
| 2026-06-05 00:00 |
23:03:09.95 |
-02:47:37.1 |
HIP 113727 |
19.70 |
| 2026-06-05 12:00 |
23:03:26.93 |
-02:45:18.2 |
HIP 113727 |
23.23 |
| 2026-06-06 00:00 |
23:03:43.76 |
-02:43:00.2 |
HIP 113727 |
27.12 |
| 2026-06-06 12:00 |
23:04:00.42 |
-02:40:43.0 |
HIP 113727 |
31.22 |
| 2026-06-07 00:00 |
23:04:16.92 |
-02:38:26.7 |
HIP 113727 |
35.44 |
| 2026-06-07 12:00 |
23:04:33.25 |
-02:36:11.2 |
HIP 113727 |
39.73 |
| 2026-06-08 00:00 |
23:04:49.42 |
-02:33:56.5 |
HIP 113931 |
40.69 |
| 2026-06-08 12:00 |
23:05:05.42 |
-02:31:42.7 |
HIP 113931 |
39.50 |
| 2026-06-09 00:00 |
23:05:21.25 |
-02:29:29.9 |
HIP 113931 |
38.82 |
| 2026-06-09 12:00 |
23:05:36.92 |
-02:27:17.9 |
HIP 114202 |
37.33 |
| 2026-06-10 00:00 |
23:05:52.41 |
-02:25:06.8 |
HIP 114202 |
32.90 |
| 2026-06-10 12:00 |
23:06:07.73 |
-02:22:56.6 |
HIP 114202 |
28.52 |
| 2026-06-11 00:00 |
23:06:22.87 |
-02:20:47.3 |
HIP 114202 |
24.20 |
| 2026-06-11 12:00 |
23:06:37.85 |
-02:18:38.9 |
HIP 114202 |
19.93 |
| 2026-06-12 00:00 |
23:06:52.64 |
-02:16:31.5 |
HIP 114202 |
15.72 |
| 2026-06-12 12:00 |
23:07:07.26 |
-02:14:25.1 |
HIP 114202 |
11.60 |
| 2026-06-13 00:00 |
23:07:21.70 |
-02:12:19.6 |
HIP 114202 |
7.63 |
| 2026-06-13 12:00 |
23:07:35.96 |
-02:10:15.0 |
HIP 114202 |
4.09 |
| 2026-06-14 00:00 |
23:07:50.04 |
-02:08:11.5 |
HIP 114202 |
3.02 |
| 2026-06-14 12:00 |
23:08:03.93 |
-02:06:08.9 |
HIP 114202 |
5.85 |
| 2026-06-15 00:00 |
23:08:17.65 |
-02:04:07.4 |
HIP 114202 |
9.53 |
| 2026-06-15 12:00 |
23:08:31.18 |
-02:02:06.8 |
HIP 114202 |
13.33 |
| 2026-06-16 00:00 |
23:08:44.52 |
-02:00:07.2 |
HIP 114322 |
16.80 |
| 2026-06-16 12:00 |
23:08:57.67 |
-01:58:08.7 |
HIP 114322 |
17.77 |
| 2026-06-17 00:00 |
23:09:10.64 |
-01:56:11.2 |
HIP 114322 |
19.44 |
| 2026-06-17 12:00 |
23:09:23.42 |
-01:54:14.8 |
HIP 114322 |
21.63 |
| 2026-06-18 00:00 |
23:09:36.01 |
-01:52:19.4 |
HIP 114322 |
24.17 |
| 2026-06-18 12:00 |
23:09:48.41 |
-01:50:25.1 |
HIP 114322 |
26.95 |
| 2026-06-19 00:00 |
23:10:00.62 |
-01:48:31.8 |
HIP 114322 |
29.87 |
| 2026-06-19 12:00 |
23:10:12.63 |
-01:46:39.6 |
HIP 114322 |
32.88 |
| 2026-06-20 00:00 |
23:10:24.45 |
-01:44:48.5 |
HIP 114551 |
32.54 |
| 2026-06-20 12:00 |
23:10:36.07 |
-01:42:58.4 |
HIP 114551 |
31.30 |
| 2026-06-21 00:00 |
23:10:47.50 |
-01:41:09.5 |
HIP 114551 |
30.41 |
| 2026-06-21 12:00 |
23:10:58.74 |
-01:39:21.6 |
HIP 114551 |
29.90 |
| 2026-06-22 00:00 |
23:11:09.77 |
-01:37:34.9 |
HIP 114551 |
29.76 |