メタデータ
| 項目 |
値 |
| Designation |
290P/Jager |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-03-14T22:45:37.206720Z |
| Orbit solution date (soln_date, UTC) |
2025-11-21T13:43:05Z |
| Obs used |
3751 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
9.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-04-01.0000000 |
| e |
0.64700621 |
| q (au) |
2.154497 |
| a (au) |
6.103499 |
| i (deg) |
19.069575 |
| Ω (om, deg) |
303.485457 |
| ω (w, deg) |
180.921262 |
| M (ma, deg) |
265.618384 |
等級
散乱 + 全体線形
$$
M_a = (13.382 + 2.659\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.382 |
| n |
2.659 |
| gf |
1.000 |
| gb |
-0.623 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2012-12-01 |
2013-08-17 |
-29.8986 |
+14.031 |
| 2013-08-17 |
2014-03-14 |
+3.1233 |
-1.256 |
| 2014-03-15 |
2015-04-24 |
+13.6416 |
-4.843 |
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) |
| 2026-05-12 00:00 |
22:56:41.77 |
+06:17:48.1 |
HIP 113313 |
12.07 |
| 2026-05-12 12:00 |
22:56:50.55 |
+06:19:43.8 |
HIP 113313 |
13.66 |
| 2026-05-13 00:00 |
22:56:59.24 |
+06:21:39.3 |
HIP 113313 |
15.64 |
| 2026-05-13 12:00 |
22:57:07.84 |
+06:23:34.5 |
HIP 113313 |
17.85 |
| 2026-05-14 00:00 |
22:57:16.35 |
+06:25:29.4 |
HIP 113313 |
20.23 |
| 2026-05-14 12:00 |
22:57:24.77 |
+06:27:24.1 |
HIP 113313 |
22.70 |
| 2026-05-15 00:00 |
22:57:33.10 |
+06:29:18.5 |
HIP 113294 |
24.33 |
| 2026-05-15 12:00 |
22:57:41.33 |
+06:31:12.6 |
HIP 113294 |
24.27 |
| 2026-05-16 00:00 |
22:57:49.47 |
+06:33:06.4 |
HIP 113294 |
24.52 |
| 2026-05-16 12:00 |
22:57:57.52 |
+06:35:00.0 |
HIP 113294 |
25.07 |
| 2026-05-17 00:00 |
22:58:05.48 |
+06:36:53.2 |
HIP 113294 |
25.87 |
| 2026-05-17 12:00 |
22:58:13.34 |
+06:38:46.2 |
HIP 113294 |
26.91 |
| 2026-05-18 00:00 |
22:58:21.10 |
+06:40:38.8 |
HIP 113294 |
28.15 |
| 2026-05-18 12:00 |
22:58:28.77 |
+06:42:31.2 |
HIP 113294 |
29.56 |
| 2026-05-19 00:00 |
22:58:36.34 |
+06:44:23.2 |
HIP 113294 |
31.11 |
| 2026-05-19 12:00 |
22:58:43.82 |
+06:46:14.9 |
HIP 113294 |
32.78 |
| 2026-05-20 00:00 |
22:58:51.20 |
+06:48:06.3 |
HIP 113465 |
32.38 |
| 2026-05-20 12:00 |
22:58:58.48 |
+06:49:57.3 |
HIP 113465 |
30.71 |
| 2026-05-21 00:00 |
22:59:05.66 |
+06:51:48.0 |
HIP 113465 |
29.18 |
| 2026-05-21 12:00 |
22:59:12.74 |
+06:53:38.4 |
HIP 113465 |
27.80 |
| 2026-05-22 00:00 |
22:59:19.72 |
+06:55:28.4 |
HIP 113465 |
26.58 |
| 2026-05-22 12:00 |
22:59:26.61 |
+06:57:18.1 |
HIP 113465 |
25.56 |
| 2026-05-23 00:00 |
22:59:33.39 |
+06:59:07.4 |
HIP 113465 |
24.73 |
| 2026-05-23 12:00 |
22:59:40.07 |
+07:00:56.4 |
HIP 113465 |
24.13 |
| 2026-05-24 00:00 |
22:59:46.66 |
+07:02:45.0 |
HIP 113465 |
23.75 |
| 2026-05-24 12:00 |
22:59:53.14 |
+07:04:33.2 |
HIP 113465 |
23.61 |
| 2026-05-25 00:00 |
22:59:59.51 |
+07:06:21.1 |
HIP 113465 |
23.69 |
| 2026-05-25 12:00 |
23:00:05.79 |
+07:08:08.6 |
HIP 113465 |
24.00 |
| 2026-05-26 00:00 |
23:00:11.96 |
+07:09:55.7 |
HIP 113465 |
24.51 |
| 2026-05-26 12:00 |
23:00:18.03 |
+07:11:42.4 |
HIP 113525 |
24.47 |
| 2026-05-27 00:00 |
23:00:23.99 |
+07:13:28.7 |
HIP 113525 |
23.70 |
| 2026-05-27 12:00 |
23:00:29.86 |
+07:15:14.6 |
HIP 113525 |
23.12 |
| 2026-05-28 00:00 |
23:00:35.61 |
+07:17:00.2 |
HIP 113525 |
22.75 |
| 2026-05-28 12:00 |
23:00:41.26 |
+07:18:45.3 |
HIP 113525 |
22.58 |
| 2026-05-29 00:00 |
23:00:46.81 |
+07:20:30.0 |
HIP 113525 |
22.62 |
| 2026-05-29 12:00 |
23:00:52.25 |
+07:22:14.3 |
HIP 113525 |
22.85 |
| 2026-05-30 00:00 |
23:00:57.58 |
+07:23:58.2 |
HIP 113525 |
23.27 |
| 2026-05-30 12:00 |
23:01:02.80 |
+07:25:41.6 |
HIP 113525 |
23.86 |
| 2026-05-31 00:00 |
23:01:07.92 |
+07:27:24.7 |
HIP 113525 |
24.60 |
| 2026-05-31 12:00 |
23:01:12.93 |
+07:29:07.3 |
HIP 113525 |
25.47 |
| 2026-06-01 00:00 |
23:01:17.83 |
+07:30:49.4 |
HIP 113811 |
24.41 |
| 2026-06-01 12:00 |
23:01:22.62 |
+07:32:31.1 |
HIP 113811 |
22.83 |
| 2026-06-02 00:00 |
23:01:27.30 |
+07:34:12.4 |
HIP 113811 |
21.35 |