メタデータ
| 項目 |
値 |
| Designation |
C/2013 H2 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-01-23T05:03:10.604160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:35Z |
| Obs used |
221 |
| NEO |
- |
| M1 |
6.600 |
| 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) |
2013-12-30.0000000 |
| e |
1.00184898 |
| q (au) |
7.498743 |
| a (au) |
-4055.614389 |
| i (deg) |
128.396346 |
| Ω (om, deg) |
262.745961 |
| ω (w, deg) |
35.998358 |
| M (ma, deg) |
-0.000092 |
等級
散乱 + 全体線形
$$
M_a = (0.912 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
0.912 |
| n |
6.000 |
| gf |
0.826 |
| gb |
-0.918 |
| k |
1.000 |
| δ90 |
4.146 |
| 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 |
07:18:50.56 |
+45:19:25.5 |
HIP 35339 |
14.56 |
| 2026-09-20 12:00 |
07:18:51.97 |
+45:19:41.6 |
HIP 35339 |
14.92 |
| 2026-09-21 00:00 |
07:18:53.33 |
+45:19:57.9 |
HIP 35339 |
15.28 |
| 2026-09-21 12:00 |
07:18:54.64 |
+45:20:14.3 |
HIP 35339 |
15.64 |
| 2026-09-22 00:00 |
07:18:55.90 |
+45:20:30.9 |
HIP 35339 |
15.99 |
| 2026-09-22 12:00 |
07:18:57.10 |
+45:20:47.7 |
HIP 35339 |
16.34 |
| 2026-09-23 00:00 |
07:18:58.26 |
+45:21:04.6 |
HIP 35339 |
16.69 |
| 2026-09-23 12:00 |
07:18:59.36 |
+45:21:21.6 |
HIP 35339 |
17.03 |
| 2026-09-24 00:00 |
07:19:00.40 |
+45:21:38.8 |
HIP 35339 |
17.37 |
| 2026-09-24 12:00 |
07:19:01.40 |
+45:21:56.2 |
HIP 35339 |
17.71 |
| 2026-09-25 00:00 |
07:19:02.34 |
+45:22:13.7 |
HIP 35339 |
18.04 |
| 2026-09-25 12:00 |
07:19:03.23 |
+45:22:31.3 |
HIP 35339 |
18.37 |
| 2026-09-26 00:00 |
07:19:04.07 |
+45:22:49.1 |
HIP 35351 |
18.58 |
| 2026-09-26 12:00 |
07:19:04.85 |
+45:23:07.0 |
HIP 35351 |
18.40 |
| 2026-09-27 00:00 |
07:19:05.58 |
+45:23:25.1 |
HIP 35351 |
18.22 |
| 2026-09-27 12:00 |
07:19:06.25 |
+45:23:43.3 |
HIP 35351 |
18.04 |
| 2026-09-28 00:00 |
07:19:06.88 |
+45:24:01.6 |
HIP 35351 |
17.85 |
| 2026-09-28 12:00 |
07:19:07.44 |
+45:24:20.1 |
HIP 35351 |
17.66 |
| 2026-09-29 00:00 |
07:19:07.96 |
+45:24:38.7 |
HIP 35351 |
17.46 |
| 2026-09-29 12:00 |
07:19:08.42 |
+45:24:57.4 |
HIP 35351 |
17.26 |
| 2026-09-30 00:00 |
07:19:08.82 |
+45:25:16.3 |
HIP 35351 |
17.06 |
| 2026-09-30 12:00 |
07:19:09.17 |
+45:25:35.3 |
HIP 35351 |
16.85 |
| 2026-10-01 00:00 |
07:19:09.46 |
+45:25:54.4 |
HIP 35351 |
16.64 |
| 2026-10-01 12:00 |
07:19:09.70 |
+45:26:13.7 |
HIP 35351 |
16.42 |
| 2026-10-02 00:00 |
07:19:09.89 |
+45:26:33.1 |
HIP 35351 |
16.20 |
| 2026-10-02 12:00 |
07:19:10.01 |
+45:26:52.6 |
HIP 35351 |
15.97 |
| 2026-10-03 00:00 |
07:19:10.09 |
+45:27:12.2 |
HIP 35351 |
15.74 |
| 2026-10-03 12:00 |
07:19:10.10 |
+45:27:31.9 |
HIP 35351 |
15.51 |
| 2026-10-04 00:00 |
07:19:10.06 |
+45:27:51.8 |
HIP 35351 |
15.27 |
| 2026-10-04 12:00 |
07:19:09.97 |
+45:28:11.8 |
HIP 35351 |
15.03 |
| 2026-10-05 00:00 |
07:19:09.81 |
+45:28:31.9 |
HIP 35351 |
14.78 |
| 2026-10-05 12:00 |
07:19:09.60 |
+45:28:52.1 |
HIP 35351 |
14.52 |
| 2026-10-06 00:00 |
07:19:09.34 |
+45:29:12.4 |
HIP 35351 |
14.26 |
| 2026-10-06 12:00 |
07:19:09.01 |
+45:29:32.9 |
HIP 35351 |
13.99 |
| 2026-10-07 00:00 |
07:19:08.63 |
+45:29:53.4 |
HIP 35351 |
13.72 |
| 2026-10-07 12:00 |
07:19:08.20 |
+45:30:14.1 |
HIP 35351 |
13.45 |
| 2026-10-08 00:00 |
07:19:07.70 |
+45:30:34.8 |
HIP 35351 |
13.17 |
| 2026-10-08 12:00 |
07:19:07.15 |
+45:30:55.7 |
HIP 35351 |
12.88 |
| 2026-10-09 00:00 |
07:19:06.54 |
+45:31:16.6 |
HIP 35351 |
12.59 |
| 2026-10-09 12:00 |
07:19:05.87 |
+45:31:37.7 |
HIP 35351 |
12.29 |
| 2026-10-10 00:00 |
07:19:05.14 |
+45:31:58.8 |
HIP 35351 |
11.99 |
| 2026-10-10 12:00 |
07:19:04.36 |
+45:32:20.1 |
HIP 35351 |
11.68 |
| 2026-10-11 00:00 |
07:19:03.51 |
+45:32:41.4 |
HIP 35351 |
11.37 |