メタデータ
| 項目 |
値 |
| Designation |
C/1946 K1 (Pajdusakova-Rotbart-Weber) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1946-05-11T10:41:13.211520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
6 |
| 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) |
1946-06-10.0000000 |
| e |
0.99943474 |
| q (au) |
1.018412 |
| a (au) |
1801.671047 |
| i (deg) |
169.559810 |
| Ω (om, deg) |
301.949074 |
| ω (w, deg) |
22.226648 |
| M (ma, deg) |
0.000381 |
等級
散乱 + 全体線形
$$
M_a = (9.823 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.823 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
07:28:48.33 |
+19:51:27.2 |
HIP 36319 |
12.72 |
| 2026-05-12 12:00 |
07:28:48.90 |
+19:51:26.5 |
HIP 36319 |
12.75 |
| 2026-05-13 00:00 |
07:28:49.49 |
+19:51:25.7 |
HIP 36319 |
12.78 |
| 2026-05-13 12:00 |
07:28:50.08 |
+19:51:24.9 |
HIP 36319 |
12.80 |
| 2026-05-14 00:00 |
07:28:50.68 |
+19:51:24.0 |
HIP 36319 |
12.84 |
| 2026-05-14 12:00 |
07:28:51.30 |
+19:51:23.2 |
HIP 36319 |
12.87 |
| 2026-05-15 00:00 |
07:28:51.92 |
+19:51:22.3 |
HIP 36319 |
12.90 |
| 2026-05-15 12:00 |
07:28:52.54 |
+19:51:21.4 |
HIP 36319 |
12.94 |
| 2026-05-16 00:00 |
07:28:53.18 |
+19:51:20.5 |
HIP 36319 |
12.98 |
| 2026-05-16 12:00 |
07:28:53.83 |
+19:51:19.6 |
HIP 36319 |
13.02 |
| 2026-05-17 00:00 |
07:28:54.48 |
+19:51:18.6 |
HIP 36319 |
13.06 |
| 2026-05-17 12:00 |
07:28:55.14 |
+19:51:17.7 |
HIP 36319 |
13.11 |
| 2026-05-18 00:00 |
07:28:55.81 |
+19:51:16.7 |
HIP 36319 |
13.15 |
| 2026-05-18 12:00 |
07:28:56.49 |
+19:51:15.6 |
HIP 36319 |
13.20 |
| 2026-05-19 00:00 |
07:28:57.17 |
+19:51:14.6 |
HIP 36319 |
13.25 |
| 2026-05-19 12:00 |
07:28:57.87 |
+19:51:13.6 |
HIP 36319 |
13.31 |
| 2026-05-20 00:00 |
07:28:58.57 |
+19:51:12.5 |
HIP 36319 |
13.36 |
| 2026-05-20 12:00 |
07:28:59.28 |
+19:51:11.4 |
HIP 36319 |
13.42 |
| 2026-05-21 00:00 |
07:29:00.00 |
+19:51:10.3 |
HIP 36319 |
13.48 |
| 2026-05-21 12:00 |
07:29:00.72 |
+19:51:09.1 |
HIP 36319 |
13.54 |
| 2026-05-22 00:00 |
07:29:01.45 |
+19:51:08.0 |
HIP 36319 |
13.61 |
| 2026-05-22 12:00 |
07:29:02.19 |
+19:51:06.8 |
HIP 36319 |
13.68 |
| 2026-05-23 00:00 |
07:29:02.94 |
+19:51:05.6 |
HIP 36319 |
13.75 |
| 2026-05-23 12:00 |
07:29:03.69 |
+19:51:04.4 |
HIP 36319 |
13.82 |
| 2026-05-24 00:00 |
07:29:04.45 |
+19:51:03.1 |
HIP 36319 |
13.90 |
| 2026-05-24 12:00 |
07:29:05.22 |
+19:51:01.9 |
HIP 36319 |
13.97 |
| 2026-05-25 00:00 |
07:29:06.00 |
+19:51:00.6 |
HIP 36319 |
14.05 |
| 2026-05-25 12:00 |
07:29:06.78 |
+19:50:59.3 |
HIP 36319 |
14.14 |
| 2026-05-26 00:00 |
07:29:07.58 |
+19:50:58.0 |
HIP 36411 |
14.07 |
| 2026-05-26 12:00 |
07:29:08.37 |
+19:50:56.7 |
HIP 36411 |
13.98 |
| 2026-05-27 00:00 |
07:29:09.18 |
+19:50:55.3 |
HIP 36411 |
13.89 |
| 2026-05-27 12:00 |
07:29:09.99 |
+19:50:54.0 |
HIP 36411 |
13.80 |
| 2026-05-28 00:00 |
07:29:10.81 |
+19:50:52.6 |
HIP 36411 |
13.71 |
| 2026-05-28 12:00 |
07:29:11.64 |
+19:50:51.2 |
HIP 36411 |
13.62 |
| 2026-05-29 00:00 |
07:29:12.47 |
+19:50:49.7 |
HIP 36411 |
13.54 |
| 2026-05-29 12:00 |
07:29:13.31 |
+19:50:48.3 |
HIP 36411 |
13.45 |
| 2026-05-30 00:00 |
07:29:14.15 |
+19:50:46.8 |
HIP 36411 |
13.37 |
| 2026-05-30 12:00 |
07:29:15.01 |
+19:50:45.3 |
HIP 36411 |
13.29 |
| 2026-05-31 00:00 |
07:29:15.87 |
+19:50:43.9 |
HIP 36411 |
13.21 |
| 2026-05-31 12:00 |
07:29:16.73 |
+19:50:42.3 |
HIP 36411 |
13.13 |
| 2026-06-01 00:00 |
07:29:17.60 |
+19:50:40.8 |
HIP 36411 |
13.06 |
| 2026-06-01 12:00 |
07:29:18.48 |
+19:50:39.3 |
HIP 36411 |
12.99 |
| 2026-06-02 00:00 |
07:29:19.37 |
+19:50:37.7 |
HIP 36411 |
12.92 |