メタデータ
| 項目 |
値 |
| Designation |
44P/Reinmuth 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-04-23T16:37:41.194560Z |
| Orbit solution date (soln_date, UTC) |
2024-03-20T08:30:40Z |
| Obs used |
1496 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
5.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-03-31.0000000 |
| e |
0.42698572 |
| q (au) |
2.113823 |
| a (au) |
3.688953 |
| i (deg) |
5.898445 |
| Ω (om, deg) |
286.481266 |
| ω (w, deg) |
58.123620 |
| M (ma, deg) |
255.155949 |
等級
散乱 + 全体線形
$$
M_a = (14.126 + 2.675\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.126 |
| n |
2.675 |
| gf |
0.998 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.992 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:04:31.88 |
-05:44:39.7 |
HIP 58872 |
1.41 |
| 2026-09-20 12:00 |
12:04:56.05 |
-05:47:16.2 |
HIP 58872 |
7.74 |
| 2026-09-21 00:00 |
12:05:20.23 |
-05:49:52.9 |
HIP 58981 |
3.79 |
| 2026-09-21 12:00 |
12:05:44.43 |
-05:52:29.9 |
HIP 58981 |
2.91 |
| 2026-09-22 00:00 |
12:06:08.64 |
-05:55:07.0 |
HIP 58981 |
9.42 |
| 2026-09-22 12:00 |
12:06:32.86 |
-05:57:44.4 |
HIP 59104 |
12.40 |
| 2026-09-23 00:00 |
12:06:57.10 |
-06:00:22.0 |
HIP 59104 |
6.15 |
| 2026-09-23 12:00 |
12:07:21.35 |
-06:02:59.8 |
HIP 59104 |
2.89 |
| 2026-09-24 00:00 |
12:07:45.61 |
-06:05:37.8 |
HIP 59104 |
8.09 |
| 2026-09-24 12:00 |
12:08:09.88 |
-06:08:16.0 |
HIP 59104 |
14.47 |
| 2026-09-25 00:00 |
12:08:34.16 |
-06:10:54.4 |
HIP 59104 |
20.97 |
| 2026-09-25 12:00 |
12:08:58.45 |
-06:13:33.0 |
HIP 59104 |
27.52 |
| 2026-09-26 00:00 |
12:09:22.75 |
-06:16:11.8 |
HIP 59402 |
31.32 |
| 2026-09-26 12:00 |
12:09:47.05 |
-06:18:50.8 |
HIP 59402 |
24.84 |
| 2026-09-27 00:00 |
12:10:11.37 |
-06:21:30.0 |
HIP 59402 |
18.42 |
| 2026-09-27 12:00 |
12:10:35.69 |
-06:24:09.3 |
HIP 59402 |
12.19 |
| 2026-09-28 00:00 |
12:11:00.03 |
-06:26:48.9 |
HIP 59402 |
6.73 |
| 2026-09-28 12:00 |
12:11:24.36 |
-06:29:28.6 |
HIP 59402 |
5.38 |
| 2026-09-29 00:00 |
12:11:48.71 |
-06:32:08.4 |
HIP 59402 |
10.00 |
| 2026-09-29 12:00 |
12:12:13.06 |
-06:34:48.5 |
HIP 59519 |
13.50 |
| 2026-09-30 00:00 |
12:12:37.42 |
-06:37:28.7 |
HIP 59519 |
16.35 |
| 2026-09-30 12:00 |
12:13:01.78 |
-06:40:09.1 |
HIP 59519 |
20.98 |
| 2026-10-01 00:00 |
12:13:26.15 |
-06:42:49.6 |
HIP 59703 |
18.12 |
| 2026-10-01 12:00 |
12:13:50.52 |
-06:45:30.3 |
HIP 59703 |
12.81 |
| 2026-10-02 00:00 |
12:14:14.89 |
-06:48:11.2 |
HIP 59703 |
9.37 |
| 2026-10-02 12:00 |
12:14:39.27 |
-06:50:52.2 |
HIP 59703 |
9.95 |
| 2026-10-03 00:00 |
12:15:03.65 |
-06:53:33.3 |
HIP 59703 |
14.07 |
| 2026-10-03 12:00 |
12:15:28.03 |
-06:56:14.6 |
HIP 59703 |
19.61 |
| 2026-10-04 00:00 |
12:15:52.42 |
-06:58:56.0 |
HIP 59743 |
20.02 |
| 2026-10-04 12:00 |
12:16:16.80 |
-07:01:37.5 |
HIP 59743 |
22.20 |
| 2026-10-05 00:00 |
12:16:41.19 |
-07:04:19.2 |
HIP 59743 |
25.93 |
| 2026-10-05 12:00 |
12:17:05.57 |
-07:07:01.0 |
HIP 59848 |
27.17 |
| 2026-10-06 00:00 |
12:17:29.96 |
-07:09:42.9 |
HIP 59848 |
27.92 |
| 2026-10-06 12:00 |
12:17:54.34 |
-07:12:25.0 |
HIP 59848 |
30.14 |
| 2026-10-07 00:00 |
12:18:18.72 |
-07:15:07.1 |
HIP 59848 |
33.53 |
| 2026-10-07 12:00 |
12:18:43.10 |
-07:17:49.3 |
HIP 60179 |
31.82 |
| 2026-10-08 00:00 |
12:19:07.47 |
-07:20:31.7 |
HIP 60179 |
25.40 |
| 2026-10-08 12:00 |
12:19:31.84 |
-07:23:14.1 |
HIP 60179 |
19.11 |
| 2026-10-09 00:00 |
12:19:56.21 |
-07:25:56.6 |
HIP 60179 |
13.16 |
| 2026-10-09 12:00 |
12:20:20.57 |
-07:28:39.2 |
HIP 60179 |
8.28 |
| 2026-10-10 00:00 |
12:20:44.92 |
-07:31:21.9 |
HIP 60179 |
7.18 |
| 2026-10-10 12:00 |
12:21:09.27 |
-07:34:04.7 |
HIP 60179 |
11.05 |
| 2026-10-11 00:00 |
12:21:33.61 |
-07:36:47.5 |
HIP 60179 |
16.74 |