メタデータ
| 項目 |
値 |
| Designation |
344P/Read |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-10-30T18:40:50.831040Z |
| Orbit solution date (soln_date, UTC) |
2026-09-21T07:12:14Z |
| Obs used |
550 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
20.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-06-17.0000000 |
| e |
0.42232377 |
| q (au) |
2.822582 |
| a (au) |
4.886097 |
| i (deg) |
3.485144 |
| Ω (om, deg) |
273.261326 |
| ω (w, deg) |
140.420077 |
| M (ma, deg) |
180.884886 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
22:45:07.85 |
-02:51:16.2 |
HIP 112326 |
11.59 |
| 2026-09-25 12:00 |
22:44:51.64 |
-02:53:03.5 |
HIP 112271 |
13.10 |
| 2026-09-26 00:00 |
22:44:35.58 |
-02:54:50.3 |
HIP 112271 |
10.16 |
| 2026-09-26 12:00 |
22:44:19.68 |
-02:56:36.6 |
HIP 112271 |
8.55 |
| 2026-09-27 00:00 |
22:44:03.94 |
-02:58:22.4 |
HIP 112271 |
8.98 |
| 2026-09-27 12:00 |
22:43:48.37 |
-03:00:07.7 |
HIP 112271 |
11.15 |
| 2026-09-28 00:00 |
22:43:32.97 |
-03:01:52.4 |
HIP 112271 |
14.26 |
| 2026-09-28 12:00 |
22:43:17.73 |
-03:03:36.5 |
HIP 112271 |
17.79 |
| 2026-09-29 00:00 |
22:43:02.68 |
-03:05:20.0 |
HIP 112271 |
21.51 |
| 2026-09-29 12:00 |
22:42:47.80 |
-03:07:02.8 |
HIP 112079 |
23.70 |
| 2026-09-30 00:00 |
22:42:33.11 |
-03:08:45.0 |
HIP 112079 |
20.74 |
| 2026-09-30 12:00 |
22:42:18.61 |
-03:10:26.5 |
HIP 112079 |
18.21 |
| 2026-10-01 00:00 |
22:42:04.29 |
-03:12:07.2 |
HIP 112079 |
16.29 |
| 2026-10-01 12:00 |
22:41:50.17 |
-03:13:47.3 |
HIP 112079 |
15.18 |
| 2026-10-02 00:00 |
22:41:36.25 |
-03:15:26.5 |
HIP 112079 |
15.01 |
| 2026-10-02 12:00 |
22:41:22.53 |
-03:17:05.0 |
HIP 112079 |
15.78 |
| 2026-10-03 00:00 |
22:41:09.02 |
-03:18:42.6 |
HIP 111965 |
15.46 |
| 2026-10-03 12:00 |
22:40:55.71 |
-03:20:19.4 |
HIP 111965 |
13.07 |
| 2026-10-04 00:00 |
22:40:42.61 |
-03:21:55.3 |
HIP 111965 |
11.40 |
| 2026-10-04 12:00 |
22:40:29.73 |
-03:23:30.4 |
HIP 111965 |
10.75 |
| 2026-10-05 00:00 |
22:40:17.07 |
-03:25:04.5 |
HIP 111965 |
11.23 |
| 2026-10-05 12:00 |
22:40:04.63 |
-03:26:37.7 |
HIP 111965 |
12.68 |
| 2026-10-06 00:00 |
22:39:52.42 |
-03:28:10.0 |
HIP 111840 |
12.37 |
| 2026-10-06 12:00 |
22:39:40.43 |
-03:29:41.2 |
HIP 111840 |
9.17 |
| 2026-10-07 00:00 |
22:39:28.67 |
-03:31:11.4 |
HIP 111840 |
6.19 |
| 2026-10-07 12:00 |
22:39:17.15 |
-03:32:40.7 |
HIP 111840 |
3.79 |
| 2026-10-08 00:00 |
22:39:05.87 |
-03:34:08.8 |
HIP 111840 |
3.34 |
| 2026-10-08 12:00 |
22:38:54.83 |
-03:35:35.9 |
HIP 111840 |
5.24 |
| 2026-10-09 00:00 |
22:38:44.03 |
-03:37:01.8 |
HIP 111840 |
7.89 |
| 2026-10-09 12:00 |
22:38:33.48 |
-03:38:26.7 |
HIP 111840 |
10.69 |
| 2026-10-10 00:00 |
22:38:23.18 |
-03:39:50.4 |
HIP 111840 |
13.50 |
| 2026-10-10 12:00 |
22:38:13.13 |
-03:41:12.9 |
HIP 111840 |
16.29 |
| 2026-10-11 00:00 |
22:38:03.33 |
-03:42:34.3 |
HIP 111840 |
19.04 |
| 2026-10-11 12:00 |
22:37:53.79 |
-03:43:54.4 |
HIP 111840 |
21.72 |
| 2026-10-12 00:00 |
22:37:44.51 |
-03:45:13.3 |
HIP 111840 |
24.35 |
| 2026-10-12 12:00 |
22:37:35.50 |
-03:46:31.0 |
HIP 111840 |
26.92 |
| 2026-10-13 00:00 |
22:37:26.74 |
-03:47:47.4 |
HIP 111710 |
26.29 |
| 2026-10-13 12:00 |
22:37:18.26 |
-03:49:02.5 |
HIP 111710 |
25.54 |
| 2026-10-14 00:00 |
22:37:10.04 |
-03:50:16.3 |
HIP 111710 |
25.00 |
| 2026-10-14 12:00 |
22:37:02.09 |
-03:51:28.8 |
HIP 111710 |
24.68 |
| 2026-10-15 00:00 |
22:36:54.41 |
-03:52:40.0 |
HIP 111710 |
24.55 |
| 2026-10-15 12:00 |
22:36:47.01 |
-03:53:49.8 |
HIP 111484 |
23.42 |
| 2026-10-16 00:00 |
22:36:39.88 |
-03:54:58.3 |
HIP 111484 |
21.53 |