メタデータ
| 項目 |
値 |
| Designation |
C/2010 FB87 (WISE-Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-11-07T09:21:42.255360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
613 |
| NEO |
- |
| M1 |
11.100 |
| 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) |
2011-05-28.0000000 |
| e |
0.99050085 |
| q (au) |
2.842763 |
| a (au) |
299.264939 |
| i (deg) |
107.625358 |
| Ω (om, deg) |
89.902192 |
| ω (w, deg) |
265.025840 |
| M (ma, deg) |
0.038382 |
等級
散乱 + 全体線形
$$
M_a = (10.840 + 3.477\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.840 |
| n |
3.477 |
| gf |
1.000 |
| gb |
-0.812 |
| 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) |
| 2026-07-29 00:00 |
03:33:37.19 |
+68:30:51.4 |
HIP 16306 |
19.35 |
| 2026-07-29 12:00 |
03:33:39.78 |
+68:31:35.4 |
HIP 16306 |
19.77 |
| 2026-07-30 00:00 |
03:33:42.30 |
+68:32:19.5 |
HIP 16306 |
20.20 |
| 2026-07-30 12:00 |
03:33:44.74 |
+68:33:03.6 |
HIP 16306 |
20.65 |
| 2026-07-31 00:00 |
03:33:47.11 |
+68:33:47.8 |
HIP 16306 |
21.11 |
| 2026-07-31 12:00 |
03:33:49.41 |
+68:34:32.1 |
HIP 16306 |
21.58 |
| 2026-08-01 00:00 |
03:33:51.64 |
+68:35:16.4 |
HIP 16306 |
22.06 |
| 2026-08-01 12:00 |
03:33:53.79 |
+68:36:00.7 |
HIP 16306 |
22.56 |
| 2026-08-02 00:00 |
03:33:55.87 |
+68:36:45.1 |
HIP 16306 |
23.06 |
| 2026-08-02 12:00 |
03:33:57.87 |
+68:37:29.5 |
HIP 16306 |
23.56 |
| 2026-08-03 00:00 |
03:33:59.80 |
+68:38:13.9 |
HIP 16306 |
24.08 |
| 2026-08-03 12:00 |
03:34:01.65 |
+68:38:58.4 |
HIP 16306 |
24.60 |
| 2026-08-04 00:00 |
03:34:03.42 |
+68:39:42.9 |
HIP 16968 |
24.23 |
| 2026-08-04 12:00 |
03:34:05.12 |
+68:40:27.5 |
HIP 16968 |
23.85 |
| 2026-08-05 00:00 |
03:34:06.75 |
+68:41:12.0 |
HIP 16968 |
23.49 |
| 2026-08-05 12:00 |
03:34:08.29 |
+68:41:56.6 |
HIP 16968 |
23.15 |
| 2026-08-06 00:00 |
03:34:09.76 |
+68:42:41.2 |
HIP 16968 |
22.84 |
| 2026-08-06 12:00 |
03:34:11.16 |
+68:43:25.8 |
HIP 16968 |
22.57 |
| 2026-08-07 00:00 |
03:34:12.47 |
+68:44:10.5 |
HIP 16968 |
22.32 |
| 2026-08-07 12:00 |
03:34:13.71 |
+68:44:55.1 |
HIP 16968 |
22.10 |
| 2026-08-08 00:00 |
03:34:14.86 |
+68:45:39.8 |
HIP 16968 |
21.91 |
| 2026-08-08 12:00 |
03:34:15.94 |
+68:46:24.5 |
HIP 16968 |
21.75 |
| 2026-08-09 00:00 |
03:34:16.94 |
+68:47:09.1 |
HIP 16968 |
21.62 |
| 2026-08-09 12:00 |
03:34:17.86 |
+68:47:53.8 |
HIP 16968 |
21.53 |
| 2026-08-10 00:00 |
03:34:18.70 |
+68:48:38.5 |
HIP 16968 |
21.47 |
| 2026-08-10 12:00 |
03:34:19.46 |
+68:49:23.1 |
HIP 16968 |
21.45 |
| 2026-08-11 00:00 |
03:34:20.14 |
+68:50:07.8 |
HIP 16968 |
21.45 |
| 2026-08-11 12:00 |
03:34:20.73 |
+68:50:52.4 |
HIP 16968 |
21.49 |
| 2026-08-12 00:00 |
03:34:21.25 |
+68:51:37.1 |
HIP 16968 |
21.57 |
| 2026-08-12 12:00 |
03:34:21.68 |
+68:52:21.7 |
HIP 16968 |
21.67 |
| 2026-08-13 00:00 |
03:34:22.04 |
+68:53:06.3 |
HIP 16968 |
21.81 |
| 2026-08-13 12:00 |
03:34:22.31 |
+68:53:50.8 |
HIP 16968 |
21.98 |
| 2026-08-14 00:00 |
03:34:22.49 |
+68:54:35.4 |
HIP 16968 |
22.18 |
| 2026-08-14 12:00 |
03:34:22.60 |
+68:55:19.9 |
HIP 16968 |
22.41 |
| 2026-08-15 00:00 |
03:34:22.62 |
+68:56:04.3 |
HIP 16968 |
22.67 |
| 2026-08-15 12:00 |
03:34:22.56 |
+68:56:48.8 |
HIP 16968 |
22.96 |
| 2026-08-16 00:00 |
03:34:22.42 |
+68:57:33.2 |
HIP 16968 |
23.27 |
| 2026-08-16 12:00 |
03:34:22.19 |
+68:58:17.5 |
HIP 16968 |
23.61 |
| 2026-08-17 00:00 |
03:34:21.88 |
+68:59:01.8 |
HIP 16968 |
23.97 |
| 2026-08-17 12:00 |
03:34:21.49 |
+68:59:46.1 |
HIP 16968 |
24.35 |
| 2026-08-18 00:00 |
03:34:21.01 |
+69:00:30.3 |
HIP 16968 |
24.76 |
| 2026-08-18 12:00 |
03:34:20.45 |
+69:01:14.4 |
HIP 16968 |
25.19 |
| 2026-08-19 00:00 |
03:34:19.80 |
+69:01:58.5 |
HIP 16968 |
25.64 |