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) |
| 2026-05-12 00:00 |
06:59:28.34 |
+46:02:25.4 |
HIP 33377 |
33.59 |
| 2026-05-12 12:00 |
06:59:31.58 |
+46:01:52.2 |
HIP 33954 |
33.55 |
| 2026-05-13 00:00 |
06:59:34.86 |
+46:01:19.0 |
HIP 33954 |
32.92 |
| 2026-05-13 12:00 |
06:59:38.19 |
+46:00:46.0 |
HIP 33954 |
32.29 |
| 2026-05-14 00:00 |
06:59:41.55 |
+46:00:13.1 |
HIP 33954 |
31.65 |
| 2026-05-14 12:00 |
06:59:44.96 |
+45:59:40.3 |
HIP 33954 |
31.02 |
| 2026-05-15 00:00 |
06:59:48.40 |
+45:59:07.6 |
HIP 33954 |
30.39 |
| 2026-05-15 12:00 |
06:59:51.89 |
+45:58:35.0 |
HIP 33954 |
29.77 |
| 2026-05-16 00:00 |
06:59:55.42 |
+45:58:02.6 |
HIP 33954 |
29.14 |
| 2026-05-16 12:00 |
06:59:58.98 |
+45:57:30.3 |
HIP 33954 |
28.52 |
| 2026-05-17 00:00 |
07:00:02.59 |
+45:56:58.1 |
HIP 33954 |
27.90 |
| 2026-05-17 12:00 |
07:00:06.23 |
+45:56:26.0 |
HIP 33954 |
27.28 |
| 2026-05-18 00:00 |
07:00:09.92 |
+45:55:54.1 |
HIP 33954 |
26.67 |
| 2026-05-18 12:00 |
07:00:13.64 |
+45:55:22.3 |
HIP 33954 |
26.06 |
| 2026-05-19 00:00 |
07:00:17.39 |
+45:54:50.6 |
HIP 33954 |
25.46 |
| 2026-05-19 12:00 |
07:00:21.19 |
+45:54:19.1 |
HIP 33954 |
24.87 |
| 2026-05-20 00:00 |
07:00:25.02 |
+45:53:47.7 |
HIP 33954 |
24.28 |
| 2026-05-20 12:00 |
07:00:28.89 |
+45:53:16.4 |
HIP 33954 |
23.70 |
| 2026-05-21 00:00 |
07:00:32.79 |
+45:52:45.3 |
HIP 33954 |
23.14 |
| 2026-05-21 12:00 |
07:00:36.73 |
+45:52:14.3 |
HIP 33954 |
22.58 |
| 2026-05-22 00:00 |
07:00:40.71 |
+45:51:43.4 |
HIP 33954 |
22.04 |
| 2026-05-22 12:00 |
07:00:44.72 |
+45:51:12.7 |
HIP 33954 |
21.51 |
| 2026-05-23 00:00 |
07:00:48.76 |
+45:50:42.1 |
HIP 33954 |
21.00 |
| 2026-05-23 12:00 |
07:00:52.84 |
+45:50:11.7 |
HIP 33954 |
20.50 |
| 2026-05-24 00:00 |
07:00:56.95 |
+45:49:41.4 |
HIP 33954 |
20.03 |
| 2026-05-24 12:00 |
07:01:01.10 |
+45:49:11.2 |
HIP 33954 |
19.57 |
| 2026-05-25 00:00 |
07:01:05.28 |
+45:48:41.2 |
HIP 33954 |
19.14 |
| 2026-05-25 12:00 |
07:01:09.49 |
+45:48:11.4 |
HIP 33954 |
18.73 |
| 2026-05-26 00:00 |
07:01:13.73 |
+45:47:41.7 |
HIP 33954 |
18.35 |
| 2026-05-26 12:00 |
07:01:18.00 |
+45:47:12.1 |
HIP 33954 |
18.00 |
| 2026-05-27 00:00 |
07:01:22.31 |
+45:46:42.7 |
HIP 33954 |
17.69 |
| 2026-05-27 12:00 |
07:01:26.64 |
+45:46:13.4 |
HIP 33954 |
17.40 |
| 2026-05-28 00:00 |
07:01:31.01 |
+45:45:44.3 |
HIP 33954 |
17.16 |
| 2026-05-28 12:00 |
07:01:35.41 |
+45:45:15.3 |
HIP 33954 |
16.95 |
| 2026-05-29 00:00 |
07:01:39.83 |
+45:44:46.5 |
HIP 33954 |
16.79 |
| 2026-05-29 12:00 |
07:01:44.29 |
+45:44:17.8 |
HIP 33954 |
16.66 |
| 2026-05-30 00:00 |
07:01:48.77 |
+45:43:49.3 |
HIP 33954 |
16.58 |
| 2026-05-30 12:00 |
07:01:53.29 |
+45:43:21.0 |
HIP 33954 |
16.55 |
| 2026-05-31 00:00 |
07:01:57.83 |
+45:42:52.8 |
HIP 33954 |
16.56 |
| 2026-05-31 12:00 |
07:02:02.40 |
+45:42:24.7 |
HIP 33954 |
16.62 |
| 2026-06-01 00:00 |
07:02:07.00 |
+45:41:56.8 |
HIP 33954 |
16.72 |
| 2026-06-01 12:00 |
07:02:11.63 |
+45:41:29.1 |
HIP 33954 |
16.87 |
| 2026-06-02 00:00 |
07:02:16.28 |
+45:41:01.5 |
HIP 33954 |
17.07 |