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 |
0.994 |
| 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) |
| 2026-03-26 00:00 |
11:13:42.63 |
-02:15:11.2 |
HIP 54898 |
14.97 |
| 2026-03-26 12:00 |
11:13:26.32 |
-02:13:21.5 |
HIP 54898 |
19.21 |
| 2026-03-27 00:00 |
11:13:10.10 |
-02:11:31.9 |
HIP 54898 |
23.53 |
| 2026-03-27 12:00 |
11:12:53.96 |
-02:09:42.5 |
HIP 54898 |
27.86 |
| 2026-03-28 00:00 |
11:12:37.90 |
-02:07:53.1 |
HIP 54898 |
32.20 |
| 2026-03-28 12:00 |
11:12:21.94 |
-02:06:03.9 |
HIP 54898 |
36.54 |
| 2026-03-29 00:00 |
11:12:06.07 |
-02:04:14.9 |
HIP 54898 |
40.86 |
| 2026-03-29 12:00 |
11:11:50.29 |
-02:02:26.0 |
HIP 54656 |
39.52 |
| 2026-03-30 00:00 |
11:11:34.62 |
-02:00:37.4 |
HIP 54656 |
37.14 |
| 2026-03-30 12:00 |
11:11:19.04 |
-01:58:48.9 |
HIP 54656 |
35.14 |
| 2026-03-31 00:00 |
11:11:03.56 |
-01:57:00.6 |
HIP 54656 |
33.57 |
| 2026-03-31 12:00 |
11:10:48.18 |
-01:55:12.7 |
HIP 54656 |
32.48 |
| 2026-04-01 00:00 |
11:10:32.92 |
-01:53:24.9 |
HIP 54656 |
31.92 |
| 2026-04-01 12:00 |
11:10:17.76 |
-01:51:37.5 |
HIP 54455 |
29.81 |
| 2026-04-02 00:00 |
11:10:02.70 |
-01:49:50.3 |
HIP 54432 |
26.78 |
| 2026-04-02 12:00 |
11:09:47.77 |
-01:48:03.4 |
HIP 54432 |
23.51 |
| 2026-04-03 00:00 |
11:09:32.94 |
-01:46:16.9 |
HIP 54432 |
20.57 |
| 2026-04-03 12:00 |
11:09:18.23 |
-01:44:30.7 |
HIP 54432 |
18.11 |
| 2026-04-04 00:00 |
11:09:03.64 |
-01:42:44.8 |
HIP 54432 |
16.34 |
| 2026-04-04 12:00 |
11:08:49.17 |
-01:40:59.4 |
HIP 54432 |
15.46 |
| 2026-04-05 00:00 |
11:08:34.82 |
-01:39:14.3 |
HIP 54432 |
15.60 |
| 2026-04-05 12:00 |
11:08:20.60 |
-01:37:29.6 |
HIP 54432 |
16.72 |
| 2026-04-06 00:00 |
11:08:06.50 |
-01:35:45.4 |
HIP 54432 |
18.61 |
| 2026-04-06 12:00 |
11:07:52.53 |
-01:34:01.5 |
HIP 54432 |
21.06 |
| 2026-04-07 00:00 |
11:07:38.69 |
-01:32:18.2 |
HIP 54432 |
23.88 |
| 2026-04-07 12:00 |
11:07:24.98 |
-01:30:35.3 |
HIP 54432 |
26.93 |
| 2026-04-08 00:00 |
11:07:11.41 |
-01:28:52.8 |
HIP 54432 |
30.14 |
| 2026-04-08 12:00 |
11:06:57.97 |
-01:27:10.9 |
HIP 54432 |
33.45 |
| 2026-04-09 00:00 |
11:06:44.67 |
-01:25:29.5 |
HIP 54432 |
36.81 |
| 2026-04-09 12:00 |
11:06:31.51 |
-01:23:48.6 |
HIP 54110 |
33.82 |
| 2026-04-10 00:00 |
11:06:18.48 |
-01:22:08.3 |
HIP 54110 |
30.30 |
| 2026-04-10 12:00 |
11:06:05.60 |
-01:20:28.5 |
HIP 54110 |
26.86 |
| 2026-04-11 00:00 |
11:05:52.87 |
-01:18:49.3 |
HIP 54110 |
23.50 |
| 2026-04-11 12:00 |
11:05:40.28 |
-01:17:10.6 |
HIP 54110 |
20.26 |
| 2026-04-12 00:00 |
11:05:27.84 |
-01:15:32.6 |
HIP 54110 |
17.19 |
| 2026-04-12 12:00 |
11:05:15.54 |
-01:13:55.2 |
HIP 54110 |
14.35 |
| 2026-04-13 00:00 |
11:05:03.40 |
-01:12:18.4 |
HIP 54110 |
11.88 |
| 2026-04-13 12:00 |
11:04:51.41 |
-01:10:42.3 |
HIP 54110 |
10.03 |
| 2026-04-14 00:00 |
11:04:39.58 |
-01:09:06.8 |
HIP 54110 |
9.13 |
| 2026-04-14 12:00 |
11:04:27.90 |
-01:07:32.0 |
HIP 54110 |
9.41 |
| 2026-04-15 00:00 |
11:04:16.38 |
-01:05:57.9 |
HIP 54110 |
10.75 |
| 2026-04-15 12:00 |
11:04:05.01 |
-01:04:24.5 |
HIP 54110 |
12.79 |
| 2026-04-16 00:00 |
11:03:53.81 |
-01:02:51.8 |
HIP 54110 |
15.22 |