269P/Jedicke
メタデータ
| 項目 |
値 |
| Designation |
269P/Jedicke |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-11-25T22:04:56.112960Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:27Z |
| Obs used |
904 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
12.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-11-07.0000000 |
| e |
0.43469217 |
| q (au) |
4.077250 |
| a (au) |
7.212443 |
| i (deg) |
6.611643 |
| Ω (om, deg) |
248.991032 |
| ω (w, deg) |
223.915918 |
| M (ma, deg) |
266.123247 |
等級
散乱 + 全体線形
$$
M_a = (4.141 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.141 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.932 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2012-09-11 |
2013-11-03 |
+7.2265 |
-4.196 |
| 2013-11-03 |
2014-11-25 |
+12.8920 |
-8.168 |
| 2014-12-14 |
2016-03-13 |
+7.6679 |
-4.901 |
| 2016-03-13 |
2017-03-21 |
+16.4470 |
-11.763 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:23:22.77 |
-13:29:27.6 |
HIP 100613 |
12.03 |
| 2026-02-03 12:00 |
20:23:36.39 |
-13:28:34.9 |
HIP 100613 |
8.72 |
| 2026-02-04 00:00 |
20:23:49.99 |
-13:27:42.1 |
HIP 100613 |
5.56 |
| 2026-02-04 12:00 |
20:24:03.58 |
-13:26:49.2 |
HIP 100613 |
3.01 |
| 2026-02-05 00:00 |
20:24:17.16 |
-13:25:56.1 |
HIP 100613 |
3.26 |
| 2026-02-05 12:00 |
20:24:30.71 |
-13:25:02.9 |
HIP 100613 |
5.96 |
| 2026-02-06 00:00 |
20:24:44.25 |
-13:24:09.6 |
HIP 100613 |
9.14 |
| 2026-02-06 12:00 |
20:24:57.77 |
-13:23:16.1 |
HIP 100613 |
12.44 |
| 2026-02-07 00:00 |
20:25:11.28 |
-13:22:22.4 |
HIP 100613 |
15.79 |
| 2026-02-07 12:00 |
20:25:24.76 |
-13:21:28.7 |
HIP 100798 |
17.11 |
| 2026-02-08 00:00 |
20:25:38.23 |
-13:20:34.8 |
HIP 100798 |
15.58 |
| 2026-02-08 12:00 |
20:25:51.67 |
-13:19:40.8 |
HIP 100798 |
14.68 |
| 2026-02-09 00:00 |
20:26:05.10 |
-13:18:46.6 |
HIP 100798 |
14.55 |
| 2026-02-09 12:00 |
20:26:18.50 |
-13:17:52.4 |
HIP 100798 |
15.19 |
| 2026-02-10 00:00 |
20:26:31.88 |
-13:16:58.0 |
HIP 100798 |
16.52 |
| 2026-02-10 12:00 |
20:26:45.24 |
-13:16:03.5 |
HIP 100798 |
18.38 |
| 2026-02-11 00:00 |
20:26:58.57 |
-13:15:08.9 |
HIP 100798 |
20.62 |
| 2026-02-11 12:00 |
20:27:11.88 |
-13:14:14.2 |
HIP 100798 |
23.14 |
| 2026-02-12 00:00 |
20:27:25.17 |
-13:13:19.3 |
HIP 100798 |
25.85 |
| 2026-02-12 12:00 |
20:27:38.43 |
-13:12:24.4 |
HIP 100798 |
28.69 |
| 2026-02-13 00:00 |
20:27:51.67 |
-13:11:29.3 |
HIP 100798 |
31.63 |
| 2026-02-13 12:00 |
20:28:04.88 |
-13:10:34.2 |
HIP 101157 |
32.95 |
| 2026-02-14 00:00 |
20:28:18.07 |
-13:09:38.9 |
HIP 101157 |
29.61 |
| 2026-02-14 12:00 |
20:28:31.22 |
-13:08:43.6 |
HIP 101157 |
26.27 |
| 2026-02-15 00:00 |
20:28:44.35 |
-13:07:48.1 |
HIP 101157 |
22.95 |
| 2026-02-15 12:00 |
20:28:57.45 |
-13:06:52.6 |
HIP 101157 |
19.63 |
| 2026-02-16 00:00 |
20:29:10.52 |
-13:05:57.0 |
HIP 101157 |
16.31 |
| 2026-02-16 12:00 |
20:29:23.56 |
-13:05:01.3 |
HIP 101157 |
13.01 |
| 2026-02-17 00:00 |
20:29:36.57 |
-13:04:05.5 |
HIP 101157 |
9.71 |
| 2026-02-17 12:00 |
20:29:49.55 |
-13:03:09.6 |
HIP 101157 |
6.41 |
| 2026-02-18 00:00 |
20:30:02.50 |
-13:02:13.7 |
HIP 101157 |
3.14 |
| 2026-02-18 12:00 |
20:30:15.42 |
-13:01:17.7 |
HIP 101157 |
0.42 |
| 2026-02-19 00:00 |
20:30:28.30 |
-13:00:21.6 |
HIP 101157 |
3.46 |
| 2026-02-19 12:00 |
20:30:41.15 |
-12:59:25.4 |
HIP 101157 |
6.72 |
| 2026-02-20 00:00 |
20:30:53.96 |
-12:58:29.2 |
HIP 101157 |
9.98 |
| 2026-02-20 12:00 |
20:31:06.74 |
-12:57:32.9 |
HIP 101157 |
13.23 |
| 2026-02-21 00:00 |
20:31:19.48 |
-12:56:36.6 |
HIP 101157 |
16.47 |
| 2026-02-21 12:00 |
20:31:32.19 |
-12:55:40.2 |
HIP 101157 |
19.70 |
| 2026-02-22 00:00 |
20:31:44.86 |
-12:54:43.7 |
HIP 101157 |
22.93 |
| 2026-02-22 12:00 |
20:31:57.50 |
-12:53:47.2 |
HIP 101157 |
26.15 |
| 2026-02-23 00:00 |
20:32:10.09 |
-12:52:50.7 |
HIP 101468 |
25.97 |
| 2026-02-23 12:00 |
20:32:22.65 |
-12:51:54.1 |
HIP 101468 |
22.78 |
| 2026-02-24 00:00 |
20:32:35.17 |
-12:50:57.5 |
HIP 101468 |
19.61 |