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) |
| 2026-09-20 00:00 |
05:39:50.18 |
+32:41:57.5 |
HIP 26538 |
15.12 |
| 2026-09-20 12:00 |
05:39:50.12 |
+32:42:04.9 |
HIP 26538 |
15.12 |
| 2026-09-21 00:00 |
05:39:50.03 |
+32:42:12.3 |
HIP 26538 |
15.12 |
| 2026-09-21 12:00 |
05:39:49.92 |
+32:42:19.7 |
HIP 26538 |
15.11 |
| 2026-09-22 00:00 |
05:39:49.77 |
+32:42:27.1 |
HIP 26538 |
15.09 |
| 2026-09-22 12:00 |
05:39:49.59 |
+32:42:34.5 |
HIP 26538 |
15.07 |
| 2026-09-23 00:00 |
05:39:49.37 |
+32:42:41.8 |
HIP 26538 |
15.04 |
| 2026-09-23 12:00 |
05:39:49.13 |
+32:42:49.1 |
HIP 26538 |
15.01 |
| 2026-09-24 00:00 |
05:39:48.85 |
+32:42:56.4 |
HIP 26538 |
14.97 |
| 2026-09-24 12:00 |
05:39:48.55 |
+32:43:03.7 |
HIP 26538 |
14.93 |
| 2026-09-25 00:00 |
05:39:48.21 |
+32:43:11.0 |
HIP 26538 |
14.88 |
| 2026-09-25 12:00 |
05:39:47.84 |
+32:43:18.3 |
HIP 26538 |
14.82 |
| 2026-09-26 00:00 |
05:39:47.44 |
+32:43:25.5 |
HIP 26538 |
14.76 |
| 2026-09-26 12:00 |
05:39:47.01 |
+32:43:32.7 |
HIP 26538 |
14.70 |
| 2026-09-27 00:00 |
05:39:46.54 |
+32:43:39.9 |
HIP 26538 |
14.63 |
| 2026-09-27 12:00 |
05:39:46.05 |
+32:43:47.1 |
HIP 26538 |
14.55 |
| 2026-09-28 00:00 |
05:39:45.52 |
+32:43:54.2 |
HIP 26538 |
14.47 |
| 2026-09-28 12:00 |
05:39:44.96 |
+32:44:01.4 |
HIP 26538 |
14.39 |
| 2026-09-29 00:00 |
05:39:44.37 |
+32:44:08.5 |
HIP 26538 |
14.29 |
| 2026-09-29 12:00 |
05:39:43.75 |
+32:44:15.6 |
HIP 26538 |
14.20 |
| 2026-09-30 00:00 |
05:39:43.10 |
+32:44:22.6 |
HIP 26538 |
14.10 |
| 2026-09-30 12:00 |
05:39:42.42 |
+32:44:29.7 |
HIP 26538 |
13.99 |
| 2026-10-01 00:00 |
05:39:41.70 |
+32:44:36.7 |
HIP 26538 |
13.88 |
| 2026-10-01 12:00 |
05:39:40.96 |
+32:44:43.7 |
HIP 26538 |
13.77 |
| 2026-10-02 00:00 |
05:39:40.18 |
+32:44:50.6 |
HIP 26538 |
13.65 |
| 2026-10-02 12:00 |
05:39:39.37 |
+32:44:57.6 |
HIP 26538 |
13.52 |
| 2026-10-03 00:00 |
05:39:38.53 |
+32:45:04.5 |
HIP 26538 |
13.39 |
| 2026-10-03 12:00 |
05:39:37.66 |
+32:45:11.4 |
HIP 26538 |
13.26 |
| 2026-10-04 00:00 |
05:39:36.76 |
+32:45:18.2 |
HIP 26538 |
13.13 |
| 2026-10-04 12:00 |
05:39:35.83 |
+32:45:25.0 |
HIP 26538 |
12.98 |
| 2026-10-05 00:00 |
05:39:34.86 |
+32:45:31.8 |
HIP 26538 |
12.84 |
| 2026-10-05 12:00 |
05:39:33.87 |
+32:45:38.6 |
HIP 26538 |
12.69 |
| 2026-10-06 00:00 |
05:39:32.84 |
+32:45:45.3 |
HIP 26538 |
12.54 |
| 2026-10-06 12:00 |
05:39:31.78 |
+32:45:52.1 |
HIP 26538 |
12.39 |
| 2026-10-07 00:00 |
05:39:30.69 |
+32:45:58.7 |
HIP 26538 |
12.23 |
| 2026-10-07 12:00 |
05:39:29.58 |
+32:46:05.4 |
HIP 26538 |
12.07 |
| 2026-10-08 00:00 |
05:39:28.42 |
+32:46:12.0 |
HIP 26538 |
11.91 |
| 2026-10-08 12:00 |
05:39:27.24 |
+32:46:18.6 |
HIP 26538 |
11.74 |
| 2026-10-09 00:00 |
05:39:26.03 |
+32:46:25.1 |
HIP 26538 |
11.57 |
| 2026-10-09 12:00 |
05:39:24.79 |
+32:46:31.6 |
HIP 26538 |
11.41 |
| 2026-10-10 00:00 |
05:39:23.51 |
+32:46:38.1 |
HIP 26538 |
11.24 |
| 2026-10-10 12:00 |
05:39:22.21 |
+32:46:44.5 |
HIP 26538 |
11.07 |
| 2026-10-11 00:00 |
05:39:20.87 |
+32:46:50.9 |
HIP 26538 |
10.90 |