メタデータ
| 項目 |
値 |
| Designation |
C/2010 D4 (WISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-03-30T22:23:21.324480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:40Z |
| Obs used |
113 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-04-12.0000000 |
| e |
0.88945973 |
| q (au) |
7.148209 |
| a (au) |
64.666104 |
| i (deg) |
105.659652 |
| Ω (om, deg) |
266.783514 |
| ω (w, deg) |
44.489319 |
| M (ma, deg) |
0.714674 |
等級
散乱 + 全体線形
$$
M_a = (15.542 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.542 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.818 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
05:46:32.65 |
+31:27:08.8 |
HIP 27164 |
15.48 |
| 2026-03-26 12:00 |
05:46:33.15 |
+31:26:53.1 |
HIP 27164 |
15.45 |
| 2026-03-27 00:00 |
05:46:33.69 |
+31:26:37.4 |
HIP 27164 |
15.43 |
| 2026-03-27 12:00 |
05:46:34.27 |
+31:26:21.8 |
HIP 27164 |
15.42 |
| 2026-03-28 00:00 |
05:46:34.88 |
+31:26:06.2 |
HIP 27164 |
15.42 |
| 2026-03-28 12:00 |
05:46:35.54 |
+31:25:50.6 |
HIP 27164 |
15.44 |
| 2026-03-29 00:00 |
05:46:36.24 |
+31:25:35.0 |
HIP 27164 |
15.47 |
| 2026-03-29 12:00 |
05:46:36.98 |
+31:25:19.5 |
HIP 27164 |
15.52 |
| 2026-03-30 00:00 |
05:46:37.75 |
+31:25:04.1 |
HIP 27164 |
15.58 |
| 2026-03-30 12:00 |
05:46:38.57 |
+31:24:48.6 |
HIP 27164 |
15.65 |
| 2026-03-31 00:00 |
05:46:39.42 |
+31:24:33.2 |
HIP 27164 |
15.74 |
| 2026-03-31 12:00 |
05:46:40.32 |
+31:24:17.9 |
HIP 27164 |
15.84 |
| 2026-04-01 00:00 |
05:46:41.25 |
+31:24:02.6 |
HIP 27164 |
15.96 |
| 2026-04-01 12:00 |
05:46:42.22 |
+31:23:47.3 |
HIP 27164 |
16.09 |
| 2026-04-02 00:00 |
05:46:43.23 |
+31:23:32.0 |
HIP 27164 |
16.23 |
| 2026-04-02 12:00 |
05:46:44.27 |
+31:23:16.8 |
HIP 27164 |
16.39 |
| 2026-04-03 00:00 |
05:46:45.36 |
+31:23:01.7 |
HIP 27164 |
16.56 |
| 2026-04-03 12:00 |
05:46:46.48 |
+31:22:46.6 |
HIP 27164 |
16.74 |
| 2026-04-04 00:00 |
05:46:47.64 |
+31:22:31.5 |
HIP 27164 |
16.94 |
| 2026-04-04 12:00 |
05:46:48.84 |
+31:22:16.4 |
HIP 27164 |
17.15 |
| 2026-04-05 00:00 |
05:46:50.08 |
+31:22:01.4 |
HIP 27164 |
17.37 |
| 2026-04-05 12:00 |
05:46:51.35 |
+31:21:46.5 |
HIP 27164 |
17.61 |
| 2026-04-06 00:00 |
05:46:52.67 |
+31:21:31.6 |
HIP 27164 |
17.85 |
| 2026-04-06 12:00 |
05:46:54.02 |
+31:21:16.7 |
HIP 27164 |
18.11 |
| 2026-04-07 00:00 |
05:46:55.40 |
+31:21:01.9 |
HIP 27164 |
18.39 |
| 2026-04-07 12:00 |
05:46:56.82 |
+31:20:47.1 |
HIP 27164 |
18.67 |
| 2026-04-08 00:00 |
05:46:58.28 |
+31:20:32.4 |
HIP 27164 |
18.97 |
| 2026-04-08 12:00 |
05:46:59.78 |
+31:20:17.7 |
HIP 27164 |
19.28 |
| 2026-04-09 00:00 |
05:47:01.31 |
+31:20:03.1 |
HIP 27164 |
19.59 |
| 2026-04-09 12:00 |
05:47:02.88 |
+31:19:48.5 |
HIP 27164 |
19.92 |
| 2026-04-10 00:00 |
05:47:04.49 |
+31:19:33.9 |
HIP 27164 |
20.27 |
| 2026-04-10 12:00 |
05:47:06.13 |
+31:19:19.4 |
HIP 27164 |
20.62 |
| 2026-04-11 00:00 |
05:47:07.81 |
+31:19:04.9 |
HIP 27164 |
20.98 |
| 2026-04-11 12:00 |
05:47:09.52 |
+31:18:50.5 |
HIP 27164 |
21.35 |
| 2026-04-12 00:00 |
05:47:11.27 |
+31:18:36.2 |
HIP 27164 |
21.73 |
| 2026-04-12 12:00 |
05:47:13.05 |
+31:18:21.8 |
HIP 27164 |
22.13 |
| 2026-04-13 00:00 |
05:47:14.87 |
+31:18:07.6 |
HIP 27164 |
22.53 |
| 2026-04-13 12:00 |
05:47:16.72 |
+31:17:53.3 |
HIP 27164 |
22.94 |
| 2026-04-14 00:00 |
05:47:18.61 |
+31:17:39.2 |
HIP 27164 |
23.36 |
| 2026-04-14 12:00 |
05:47:20.53 |
+31:17:25.0 |
HIP 27164 |
23.79 |
| 2026-04-15 00:00 |
05:47:22.49 |
+31:17:11.0 |
HIP 27164 |
24.23 |
| 2026-04-15 12:00 |
05:47:24.48 |
+31:16:56.9 |
HIP 27164 |
24.67 |
| 2026-04-16 00:00 |
05:47:26.51 |
+31:16:43.0 |
HIP 27164 |
25.13 |