メタデータ
| 項目 |
値 |
| Designation |
C/2007 W1 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-06-24T21:18:35.372160Z |
| Orbit solution date (soln_date, UTC) |
2022-06-10T02:47:51Z |
| Obs used |
1639 |
| NEO |
- |
| M1 |
15.000 |
| K1 |
8.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-05-25.0000000 |
| e |
1.00010076 |
| q (au) |
0.849660 |
| a (au) |
-8432.181012 |
| i (deg) |
9.888931 |
| Ω (om, deg) |
334.529078 |
| ω (w, deg) |
306.550768 |
| M (ma, deg) |
-0.000039 |
等級
散乱 + 全体線形
$$
M_a = (14.072 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.072 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.660 |
| k |
0.968 |
| δ90 |
9.995 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2007-03-21 |
2008-06-24 |
+5.8954 |
-3.412 |
| 2008-06-26 |
2008-12-17 |
+14.2002 |
-2.793 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
05:30:31.82 |
+32:22:28.3 |
HIP 25876 |
16.70 |
| 2026-06-01 12:00 |
05:30:35.42 |
+32:22:28.9 |
HIP 25876 |
16.19 |
| 2026-06-02 00:00 |
05:30:39.03 |
+32:22:29.6 |
HIP 25876 |
15.70 |
| 2026-06-02 12:00 |
05:30:42.65 |
+32:22:30.3 |
HIP 25876 |
15.23 |
| 2026-06-03 00:00 |
05:30:46.27 |
+32:22:31.1 |
HIP 25876 |
14.78 |
| 2026-06-03 12:00 |
05:30:49.90 |
+32:22:31.9 |
HIP 25876 |
14.36 |
| 2026-06-04 00:00 |
05:30:53.53 |
+32:22:32.8 |
HIP 25876 |
13.97 |
| 2026-06-04 12:00 |
05:30:57.17 |
+32:22:33.7 |
HIP 25876 |
13.62 |
| 2026-06-05 00:00 |
05:31:00.82 |
+32:22:34.7 |
HIP 25876 |
13.30 |
| 2026-06-05 12:00 |
05:31:04.46 |
+32:22:35.8 |
HIP 25876 |
13.02 |
| 2026-06-06 00:00 |
05:31:08.11 |
+32:22:36.9 |
HIP 25876 |
12.78 |
| 2026-06-06 12:00 |
05:31:11.77 |
+32:22:38.1 |
HIP 25876 |
12.58 |
| 2026-06-07 00:00 |
05:31:15.43 |
+32:22:39.3 |
HIP 25876 |
12.43 |
| 2026-06-07 12:00 |
05:31:19.09 |
+32:22:40.6 |
HIP 25876 |
12.33 |
| 2026-06-08 00:00 |
05:31:22.75 |
+32:22:41.9 |
HIP 25876 |
12.27 |
| 2026-06-08 12:00 |
05:31:26.42 |
+32:22:43.3 |
HIP 25876 |
12.27 |
| 2026-06-09 00:00 |
05:31:30.09 |
+32:22:44.7 |
HIP 25876 |
12.31 |
| 2026-06-09 12:00 |
05:31:33.77 |
+32:22:46.2 |
HIP 25876 |
12.41 |
| 2026-06-10 00:00 |
05:31:37.44 |
+32:22:47.8 |
HIP 25876 |
12.55 |
| 2026-06-10 12:00 |
05:31:41.12 |
+32:22:49.4 |
HIP 25876 |
12.74 |
| 2026-06-11 00:00 |
05:31:44.80 |
+32:22:51.1 |
HIP 25876 |
12.98 |
| 2026-06-11 12:00 |
05:31:48.48 |
+32:22:52.8 |
HIP 25876 |
13.25 |
| 2026-06-12 00:00 |
05:31:52.17 |
+32:22:54.6 |
HIP 25876 |
13.57 |
| 2026-06-12 12:00 |
05:31:55.85 |
+32:22:56.4 |
HIP 25876 |
13.93 |
| 2026-06-13 00:00 |
05:31:59.54 |
+32:22:58.3 |
HIP 25876 |
14.31 |
| 2026-06-13 12:00 |
05:32:03.23 |
+32:23:00.2 |
HIP 25984 |
14.31 |
| 2026-06-14 00:00 |
05:32:06.91 |
+32:23:02.2 |
HIP 25984 |
13.89 |
| 2026-06-14 12:00 |
05:32:10.60 |
+32:23:04.2 |
HIP 25984 |
13.50 |
| 2026-06-15 00:00 |
05:32:14.29 |
+32:23:06.3 |
HIP 25984 |
13.14 |
| 2026-06-15 12:00 |
05:32:17.97 |
+32:23:08.5 |
HIP 25984 |
12.83 |
| 2026-06-16 00:00 |
05:32:21.66 |
+32:23:10.7 |
HIP 25984 |
12.55 |
| 2026-06-16 12:00 |
05:32:25.34 |
+32:23:13.0 |
HIP 26034 |
12.11 |
| 2026-06-17 00:00 |
05:32:29.03 |
+32:23:15.3 |
HIP 26034 |
11.45 |
| 2026-06-17 12:00 |
05:32:32.71 |
+32:23:17.7 |
HIP 26034 |
10.81 |
| 2026-06-18 00:00 |
05:32:36.39 |
+32:23:20.1 |
HIP 26034 |
10.20 |
| 2026-06-18 12:00 |
05:32:40.07 |
+32:23:22.5 |
HIP 26034 |
9.60 |
| 2026-06-19 00:00 |
05:32:43.75 |
+32:23:25.1 |
HIP 26034 |
9.04 |
| 2026-06-19 12:00 |
05:32:47.42 |
+32:23:27.7 |
HIP 26034 |
8.51 |
| 2026-06-20 00:00 |
05:32:51.10 |
+32:23:30.3 |
HIP 26034 |
8.02 |
| 2026-06-20 12:00 |
05:32:54.77 |
+32:23:33.0 |
HIP 26034 |
7.58 |
| 2026-06-21 00:00 |
05:32:58.43 |
+32:23:35.7 |
HIP 26034 |
7.20 |
| 2026-06-21 12:00 |
05:33:02.10 |
+32:23:38.5 |
HIP 26034 |
6.89 |
| 2026-06-22 00:00 |
05:33:05.76 |
+32:23:41.3 |
HIP 26034 |
6.65 |