メタデータ
| 項目 |
値 |
| Designation |
P/2010 E2 (Jarnac) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-04-07T22:14:05.470080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
344 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-04-02.0000000 |
| e |
0.72237010 |
| q (au) |
2.398733 |
| a (au) |
8.640039 |
| i (deg) |
15.437000 |
| Ω (om, deg) |
177.899371 |
| ω (w, deg) |
8.294555 |
| M (ma, deg) |
359.770001 |
等級
散乱 + 全体線形
$$
M_a = (11.468 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.468 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-20 00:00 |
01:23:51.36 |
+02:22:25.2 |
HIP 6459 |
18.95 |
| 2026-09-20 12:00 |
01:23:45.05 |
+02:21:35.9 |
HIP 6459 |
18.71 |
| 2026-09-21 00:00 |
01:23:38.70 |
+02:20:46.5 |
HIP 6459 |
18.64 |
| 2026-09-21 12:00 |
01:23:32.32 |
+02:19:57.0 |
HIP 6459 |
18.73 |
| 2026-09-22 00:00 |
01:23:25.91 |
+02:19:07.4 |
HIP 6459 |
18.99 |
| 2026-09-22 12:00 |
01:23:19.46 |
+02:18:17.8 |
HIP 6459 |
19.42 |
| 2026-09-23 00:00 |
01:23:12.98 |
+02:17:28.0 |
HIP 6459 |
20.00 |
| 2026-09-23 12:00 |
01:23:06.47 |
+02:16:38.2 |
HIP 6459 |
20.73 |
| 2026-09-24 00:00 |
01:22:59.93 |
+02:15:48.3 |
HIP 6459 |
21.59 |
| 2026-09-24 12:00 |
01:22:53.36 |
+02:14:58.4 |
HIP 6459 |
22.57 |
| 2026-09-25 00:00 |
01:22:46.76 |
+02:14:08.4 |
HIP 6459 |
23.65 |
| 2026-09-25 12:00 |
01:22:40.13 |
+02:13:18.4 |
HIP 6509 |
23.91 |
| 2026-09-26 00:00 |
01:22:33.48 |
+02:12:28.2 |
HIP 6509 |
24.30 |
| 2026-09-26 12:00 |
01:22:26.79 |
+02:11:38.1 |
HIP 6509 |
24.83 |
| 2026-09-27 00:00 |
01:22:20.08 |
+02:10:47.9 |
HIP 6509 |
25.49 |
| 2026-09-27 12:00 |
01:22:13.35 |
+02:09:57.7 |
HIP 6509 |
26.27 |
| 2026-09-28 00:00 |
01:22:06.59 |
+02:09:07.4 |
HIP 6432 |
26.64 |
| 2026-09-28 12:00 |
01:21:59.80 |
+02:08:17.1 |
HIP 6432 |
26.38 |
| 2026-09-29 00:00 |
01:21:52.99 |
+02:07:26.8 |
HIP 6432 |
26.26 |
| 2026-09-29 12:00 |
01:21:46.15 |
+02:06:36.4 |
HIP 6432 |
26.28 |
| 2026-09-30 00:00 |
01:21:39.29 |
+02:05:46.0 |
HIP 6432 |
26.44 |
| 2026-09-30 12:00 |
01:21:32.41 |
+02:04:55.7 |
HIP 6432 |
26.74 |
| 2026-10-01 00:00 |
01:21:25.51 |
+02:04:05.3 |
HIP 6432 |
27.18 |
| 2026-10-01 12:00 |
01:21:18.59 |
+02:03:14.9 |
HIP 6432 |
27.74 |
| 2026-10-02 00:00 |
01:21:11.65 |
+02:02:24.5 |
HIP 6432 |
28.43 |
| 2026-10-02 12:00 |
01:21:04.68 |
+02:01:34.1 |
HIP 6432 |
29.23 |
| 2026-10-03 00:00 |
01:20:57.70 |
+02:00:43.7 |
HIP 6263 |
30.06 |
| 2026-10-03 12:00 |
01:20:50.70 |
+01:59:53.4 |
HIP 6263 |
30.37 |
| 2026-10-04 00:00 |
01:20:43.69 |
+01:59:03.0 |
HIP 6263 |
30.79 |
| 2026-10-04 12:00 |
01:20:36.65 |
+01:58:12.7 |
HIP 6263 |
31.33 |
| 2026-10-05 00:00 |
01:20:29.60 |
+01:57:22.4 |
HIP 6263 |
31.98 |
| 2026-10-05 12:00 |
01:20:22.54 |
+01:56:32.2 |
HIP 6263 |
32.73 |
| 2026-10-06 00:00 |
01:20:15.45 |
+01:55:42.0 |
HIP 6263 |
33.58 |
| 2026-10-06 12:00 |
01:20:08.36 |
+01:54:51.8 |
HIP 6263 |
34.52 |
| 2026-10-07 00:00 |
01:20:01.25 |
+01:54:01.7 |
HIP 6263 |
35.54 |
| 2026-10-07 12:00 |
01:19:54.13 |
+01:53:11.7 |
HIP 6263 |
36.64 |
| 2026-10-08 00:00 |
01:19:47.00 |
+01:52:21.7 |
HIP 6013 |
36.91 |
| 2026-10-08 12:00 |
01:19:39.86 |
+01:51:31.7 |
HIP 6013 |
35.09 |
| 2026-10-09 00:00 |
01:19:32.71 |
+01:50:41.9 |
HIP 6013 |
33.29 |
| 2026-10-09 12:00 |
01:19:25.55 |
+01:49:52.1 |
HIP 6013 |
31.50 |
| 2026-10-10 00:00 |
01:19:18.38 |
+01:49:02.4 |
HIP 6013 |
29.74 |
| 2026-10-10 12:00 |
01:19:11.20 |
+01:48:12.8 |
HIP 6013 |
28.00 |
| 2026-10-11 00:00 |
01:19:04.02 |
+01:47:23.3 |
HIP 6013 |
26.30 |