C/2007 W1 (Boattini)
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) |
| 2026-02-03 00:00 |
05:26:01.23 |
+32:43:30.7 |
HIP 25304 |
15.72 |
| 2026-02-03 12:00 |
05:25:58.96 |
+32:43:22.5 |
HIP 25304 |
15.23 |
| 2026-02-04 00:00 |
05:25:56.71 |
+32:43:14.4 |
HIP 25304 |
14.75 |
| 2026-02-04 12:00 |
05:25:54.49 |
+32:43:06.2 |
HIP 25304 |
14.28 |
| 2026-02-05 00:00 |
05:25:52.30 |
+32:42:58.0 |
HIP 25304 |
13.81 |
| 2026-02-05 12:00 |
05:25:50.13 |
+32:42:49.7 |
HIP 25304 |
13.35 |
| 2026-02-06 00:00 |
05:25:48.00 |
+32:42:41.5 |
HIP 25304 |
12.90 |
| 2026-02-06 12:00 |
05:25:45.89 |
+32:42:33.2 |
HIP 25304 |
12.46 |
| 2026-02-07 00:00 |
05:25:43.81 |
+32:42:24.9 |
HIP 25304 |
12.02 |
| 2026-02-07 12:00 |
05:25:41.77 |
+32:42:16.6 |
HIP 25304 |
11.59 |
| 2026-02-08 00:00 |
05:25:39.75 |
+32:42:08.3 |
HIP 25304 |
11.17 |
| 2026-02-08 12:00 |
05:25:37.76 |
+32:42:00.0 |
HIP 25304 |
10.76 |
| 2026-02-09 00:00 |
05:25:35.79 |
+32:41:51.6 |
HIP 25304 |
10.35 |
| 2026-02-09 12:00 |
05:25:33.86 |
+32:41:43.3 |
HIP 25304 |
9.95 |
| 2026-02-10 00:00 |
05:25:31.96 |
+32:41:34.9 |
HIP 25304 |
9.57 |
| 2026-02-10 12:00 |
05:25:30.09 |
+32:41:26.5 |
HIP 25304 |
9.19 |
| 2026-02-11 00:00 |
05:25:28.25 |
+32:41:18.1 |
HIP 25304 |
8.82 |
| 2026-02-11 12:00 |
05:25:26.44 |
+32:41:09.7 |
HIP 25304 |
8.47 |
| 2026-02-12 00:00 |
05:25:24.65 |
+32:41:01.3 |
HIP 25304 |
8.12 |
| 2026-02-12 12:00 |
05:25:22.90 |
+32:40:52.8 |
HIP 25304 |
7.78 |
| 2026-02-13 00:00 |
05:25:21.18 |
+32:40:44.4 |
HIP 25304 |
7.46 |
| 2026-02-13 12:00 |
05:25:19.49 |
+32:40:35.9 |
HIP 25304 |
7.15 |
| 2026-02-14 00:00 |
05:25:17.83 |
+32:40:27.5 |
HIP 25304 |
6.86 |
| 2026-02-14 12:00 |
05:25:16.21 |
+32:40:19.0 |
HIP 25304 |
6.57 |
| 2026-02-15 00:00 |
05:25:14.61 |
+32:40:10.5 |
HIP 25304 |
6.31 |
| 2026-02-15 12:00 |
05:25:13.04 |
+32:40:02.1 |
HIP 25304 |
6.06 |
| 2026-02-16 00:00 |
05:25:11.51 |
+32:39:53.6 |
HIP 25304 |
5.82 |
| 2026-02-16 12:00 |
05:25:10.01 |
+32:39:45.1 |
HIP 25304 |
5.61 |
| 2026-02-17 00:00 |
05:25:08.54 |
+32:39:36.6 |
HIP 25304 |
5.41 |
| 2026-02-17 12:00 |
05:25:07.10 |
+32:39:28.1 |
HIP 25304 |
5.24 |
| 2026-02-18 00:00 |
05:25:05.69 |
+32:39:19.6 |
HIP 25304 |
5.08 |
| 2026-02-18 12:00 |
05:25:04.31 |
+32:39:11.1 |
HIP 25304 |
4.95 |
| 2026-02-19 00:00 |
05:25:02.97 |
+32:39:02.7 |
HIP 25304 |
4.84 |
| 2026-02-19 12:00 |
05:25:01.66 |
+32:38:54.2 |
HIP 25304 |
4.76 |
| 2026-02-20 00:00 |
05:25:00.38 |
+32:38:45.7 |
HIP 25304 |
4.69 |
| 2026-02-20 12:00 |
05:24:59.13 |
+32:38:37.2 |
HIP 25304 |
4.65 |
| 2026-02-21 00:00 |
05:24:57.91 |
+32:38:28.7 |
HIP 25304 |
4.63 |
| 2026-02-21 12:00 |
05:24:56.73 |
+32:38:20.2 |
HIP 25304 |
4.64 |
| 2026-02-22 00:00 |
05:24:55.58 |
+32:38:11.8 |
HIP 25304 |
4.66 |
| 2026-02-22 12:00 |
05:24:54.46 |
+32:38:03.3 |
HIP 25304 |
4.70 |
| 2026-02-23 00:00 |
05:24:53.37 |
+32:37:54.8 |
HIP 25304 |
4.76 |
| 2026-02-23 12:00 |
05:24:52.32 |
+32:37:46.4 |
HIP 25304 |
4.84 |
| 2026-02-24 00:00 |
05:24:51.30 |
+32:37:37.9 |
HIP 25304 |
4.93 |