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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
07:02:20.96 |
+45:40:34.1 |
HIP 33954 |
17.31 |
| 2026-06-03 00:00 |
07:02:25.66 |
+45:40:06.9 |
HIP 33954 |
17.59 |
| 2026-06-03 12:00 |
07:02:30.39 |
+45:39:39.8 |
HIP 33954 |
17.92 |
| 2026-06-04 00:00 |
07:02:35.15 |
+45:39:12.9 |
HIP 33954 |
18.28 |
| 2026-06-04 12:00 |
07:02:39.93 |
+45:38:46.1 |
HIP 33954 |
18.69 |
| 2026-06-05 00:00 |
07:02:44.74 |
+45:38:19.5 |
HIP 33954 |
19.12 |
| 2026-06-05 12:00 |
07:02:49.57 |
+45:37:53.1 |
HIP 33954 |
19.59 |
| 2026-06-06 00:00 |
07:02:54.43 |
+45:37:26.8 |
HIP 33954 |
20.10 |
| 2026-06-06 12:00 |
07:02:59.31 |
+45:37:00.7 |
HIP 33954 |
20.63 |
| 2026-06-07 00:00 |
07:03:04.21 |
+45:36:34.8 |
HIP 33954 |
21.19 |
| 2026-06-07 12:00 |
07:03:09.14 |
+45:36:09.0 |
HIP 33954 |
21.78 |
| 2026-06-08 00:00 |
07:03:14.09 |
+45:35:43.4 |
HIP 33954 |
22.39 |
| 2026-06-08 12:00 |
07:03:19.06 |
+45:35:18.0 |
HIP 33954 |
23.02 |
| 2026-06-09 00:00 |
07:03:24.05 |
+45:34:52.7 |
HIP 33954 |
23.67 |
| 2026-06-09 12:00 |
07:03:29.07 |
+45:34:27.6 |
HIP 33954 |
24.35 |
| 2026-06-10 00:00 |
07:03:34.10 |
+45:34:02.7 |
HIP 33954 |
25.04 |
| 2026-06-10 12:00 |
07:03:39.16 |
+45:33:38.0 |
HIP 33954 |
25.75 |
| 2026-06-11 00:00 |
07:03:44.24 |
+45:33:13.4 |
HIP 34259 |
25.11 |
| 2026-06-11 12:00 |
07:03:49.34 |
+45:32:49.0 |
HIP 34259 |
24.31 |
| 2026-06-12 00:00 |
07:03:54.46 |
+45:32:24.8 |
HIP 34259 |
23.53 |
| 2026-06-12 12:00 |
07:03:59.59 |
+45:32:00.7 |
HIP 34259 |
22.76 |
| 2026-06-13 00:00 |
07:04:04.75 |
+45:31:36.9 |
HIP 34259 |
21.99 |
| 2026-06-13 12:00 |
07:04:09.92 |
+45:31:13.2 |
HIP 34259 |
21.25 |
| 2026-06-14 00:00 |
07:04:15.12 |
+45:30:49.7 |
HIP 34259 |
20.52 |
| 2026-06-14 12:00 |
07:04:20.33 |
+45:30:26.3 |
HIP 34259 |
19.80 |
| 2026-06-15 00:00 |
07:04:25.56 |
+45:30:03.2 |
HIP 34259 |
19.11 |
| 2026-06-15 12:00 |
07:04:30.80 |
+45:29:40.2 |
HIP 34259 |
18.44 |
| 2026-06-16 00:00 |
07:04:36.06 |
+45:29:17.5 |
HIP 34259 |
17.80 |
| 2026-06-16 12:00 |
07:04:41.34 |
+45:28:54.9 |
HIP 34259 |
17.19 |
| 2026-06-17 00:00 |
07:04:46.63 |
+45:28:32.4 |
HIP 34259 |
16.61 |
| 2026-06-17 12:00 |
07:04:51.94 |
+45:28:10.2 |
HIP 34259 |
16.07 |
| 2026-06-18 00:00 |
07:04:57.26 |
+45:27:48.2 |
HIP 34259 |
15.56 |
| 2026-06-18 12:00 |
07:05:02.60 |
+45:27:26.3 |
HIP 34259 |
15.11 |
| 2026-06-19 00:00 |
07:05:07.95 |
+45:27:04.7 |
HIP 34259 |
14.70 |
| 2026-06-19 12:00 |
07:05:13.31 |
+45:26:43.2 |
HIP 34259 |
14.35 |
| 2026-06-20 00:00 |
07:05:18.69 |
+45:26:21.9 |
HIP 34259 |
14.06 |
| 2026-06-20 12:00 |
07:05:24.08 |
+45:26:00.8 |
HIP 34259 |
13.83 |
| 2026-06-21 00:00 |
07:05:29.48 |
+45:25:39.9 |
HIP 34259 |
13.67 |
| 2026-06-21 12:00 |
07:05:34.89 |
+45:25:19.2 |
HIP 34259 |
13.58 |
| 2026-06-22 00:00 |
07:05:40.32 |
+45:24:58.6 |
HIP 34259 |
13.56 |