メタデータ
| 項目 |
値 |
| Designation |
C/1946 P1 (Jones) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1946-10-26T18:27:48.911040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
11 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1947-03-18.0000000 |
| e |
1.00097842 |
| q (au) |
1.135979 |
| a (au) |
-1161.030280 |
| i (deg) |
56.964881 |
| Ω (om, deg) |
238.335472 |
| ω (w, deg) |
320.410218 |
| M (ma, deg) |
0.003543 |
等級
散乱 + 全体線形
$$
M_a = (3.749 + 4.333\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.749 |
| n |
4.333 |
| gf |
0.996 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-07-29 00:00 |
00:07:35.46 |
+46:48:06.2 |
HIP 591 |
4.97 |
| 2026-07-29 12:00 |
00:07:34.63 |
+46:48:13.6 |
HIP 591 |
4.92 |
| 2026-07-30 00:00 |
00:07:33.80 |
+46:48:20.9 |
HIP 591 |
4.88 |
| 2026-07-30 12:00 |
00:07:32.95 |
+46:48:28.1 |
HIP 591 |
4.84 |
| 2026-07-31 00:00 |
00:07:32.09 |
+46:48:35.3 |
HIP 591 |
4.80 |
| 2026-07-31 12:00 |
00:07:31.22 |
+46:48:42.3 |
HIP 591 |
4.77 |
| 2026-08-01 00:00 |
00:07:30.34 |
+46:48:49.3 |
HIP 591 |
4.74 |
| 2026-08-01 12:00 |
00:07:29.45 |
+46:48:56.1 |
HIP 591 |
4.72 |
| 2026-08-02 00:00 |
00:07:28.55 |
+46:49:02.9 |
HIP 591 |
4.71 |
| 2026-08-02 12:00 |
00:07:27.64 |
+46:49:09.5 |
HIP 591 |
4.70 |
| 2026-08-03 00:00 |
00:07:26.72 |
+46:49:16.1 |
HIP 591 |
4.69 |
| 2026-08-03 12:00 |
00:07:25.79 |
+46:49:22.6 |
HIP 591 |
4.69 |
| 2026-08-04 00:00 |
00:07:24.85 |
+46:49:29.0 |
HIP 591 |
4.70 |
| 2026-08-04 12:00 |
00:07:23.89 |
+46:49:35.2 |
HIP 591 |
4.71 |
| 2026-08-05 00:00 |
00:07:22.93 |
+46:49:41.4 |
HIP 591 |
4.73 |
| 2026-08-05 12:00 |
00:07:21.96 |
+46:49:47.5 |
HIP 591 |
4.76 |
| 2026-08-06 00:00 |
00:07:20.98 |
+46:49:53.5 |
HIP 591 |
4.78 |
| 2026-08-06 12:00 |
00:07:19.99 |
+46:49:59.4 |
HIP 591 |
4.82 |
| 2026-08-07 00:00 |
00:07:18.99 |
+46:50:05.2 |
HIP 591 |
4.86 |
| 2026-08-07 12:00 |
00:07:17.97 |
+46:50:10.9 |
HIP 591 |
4.91 |
| 2026-08-08 00:00 |
00:07:16.95 |
+46:50:16.5 |
HIP 591 |
4.96 |
| 2026-08-08 12:00 |
00:07:15.92 |
+46:50:22.0 |
HIP 591 |
5.02 |
| 2026-08-09 00:00 |
00:07:14.88 |
+46:50:27.4 |
HIP 591 |
5.08 |
| 2026-08-09 12:00 |
00:07:13.83 |
+46:50:32.7 |
HIP 591 |
5.15 |
| 2026-08-10 00:00 |
00:07:12.77 |
+46:50:37.9 |
HIP 591 |
5.22 |
| 2026-08-10 12:00 |
00:07:11.71 |
+46:50:43.0 |
HIP 591 |
5.30 |
| 2026-08-11 00:00 |
00:07:10.63 |
+46:50:48.0 |
HIP 591 |
5.38 |
| 2026-08-11 12:00 |
00:07:09.54 |
+46:50:52.9 |
HIP 591 |
5.47 |
| 2026-08-12 00:00 |
00:07:08.45 |
+46:50:57.7 |
HIP 591 |
5.56 |
| 2026-08-12 12:00 |
00:07:07.34 |
+46:51:02.4 |
HIP 591 |
5.65 |
| 2026-08-13 00:00 |
00:07:06.23 |
+46:51:07.0 |
HIP 591 |
5.75 |
| 2026-08-13 12:00 |
00:07:05.10 |
+46:51:11.4 |
HIP 591 |
5.86 |
| 2026-08-14 00:00 |
00:07:03.97 |
+46:51:15.8 |
HIP 591 |
5.97 |
| 2026-08-14 12:00 |
00:07:02.83 |
+46:51:20.1 |
HIP 591 |
6.08 |
| 2026-08-15 00:00 |
00:07:01.68 |
+46:51:24.2 |
HIP 591 |
6.19 |
| 2026-08-15 12:00 |
00:07:00.53 |
+46:51:28.3 |
HIP 591 |
6.31 |
| 2026-08-16 00:00 |
00:06:59.36 |
+46:51:32.2 |
HIP 591 |
6.43 |
| 2026-08-16 12:00 |
00:06:58.19 |
+46:51:36.1 |
HIP 591 |
6.56 |
| 2026-08-17 00:00 |
00:06:57.01 |
+46:51:39.8 |
HIP 591 |
6.69 |
| 2026-08-17 12:00 |
00:06:55.82 |
+46:51:43.4 |
HIP 591 |
6.82 |
| 2026-08-18 00:00 |
00:06:54.62 |
+46:51:46.9 |
HIP 591 |
6.95 |
| 2026-08-18 12:00 |
00:06:53.41 |
+46:51:50.3 |
HIP 591 |
7.09 |
| 2026-08-19 00:00 |
00:06:52.20 |
+46:51:53.6 |
HIP 591 |
7.23 |