メタデータ
| 項目 |
値 |
| Designation |
C/2007 VO53 (Spacewatch) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-04-26T10:19:11.421120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:13Z |
| Obs used |
701 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-08-27.0000000 |
| e |
0.99960499 |
| q (au) |
4.842735 |
| a (au) |
12259.836506 |
| i (deg) |
86.994806 |
| Ω (om, deg) |
59.744414 |
| ω (w, deg) |
75.019866 |
| M (ma, deg) |
359.999824 |
等級
散乱 + 全体線形
$$
M_a = (1.756 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
1.756 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
15:19:28.38 |
-49:24:10.3 |
HIP 75002 |
13.16 |
| 2026-06-01 12:00 |
15:19:22.90 |
-49:23:54.9 |
HIP 75002 |
13.48 |
| 2026-06-02 00:00 |
15:19:17.43 |
-49:23:39.2 |
HIP 75002 |
13.85 |
| 2026-06-02 12:00 |
15:19:11.99 |
-49:23:23.4 |
HIP 75002 |
14.28 |
| 2026-06-03 00:00 |
15:19:06.56 |
-49:23:07.3 |
HIP 75002 |
14.75 |
| 2026-06-03 12:00 |
15:19:01.15 |
-49:22:51.0 |
HIP 74831 |
14.05 |
| 2026-06-04 00:00 |
15:18:55.76 |
-49:22:34.5 |
HIP 74831 |
13.19 |
| 2026-06-04 12:00 |
15:18:50.38 |
-49:22:17.8 |
HIP 74831 |
12.35 |
| 2026-06-05 00:00 |
15:18:45.03 |
-49:22:00.9 |
HIP 74831 |
11.52 |
| 2026-06-05 12:00 |
15:18:39.70 |
-49:21:43.8 |
HIP 74831 |
10.71 |
| 2026-06-06 00:00 |
15:18:34.38 |
-49:21:26.5 |
HIP 74831 |
9.92 |
| 2026-06-06 12:00 |
15:18:29.09 |
-49:21:09.0 |
HIP 74831 |
9.15 |
| 2026-06-07 00:00 |
15:18:23.82 |
-49:20:51.3 |
HIP 74831 |
8.42 |
| 2026-06-07 12:00 |
15:18:18.57 |
-49:20:33.4 |
HIP 74831 |
7.73 |
| 2026-06-08 00:00 |
15:18:13.34 |
-49:20:15.3 |
HIP 74831 |
7.09 |
| 2026-06-08 12:00 |
15:18:08.14 |
-49:19:57.0 |
HIP 74831 |
6.52 |
| 2026-06-09 00:00 |
15:18:02.95 |
-49:19:38.5 |
HIP 74831 |
6.04 |
| 2026-06-09 12:00 |
15:17:57.79 |
-49:19:19.8 |
HIP 74831 |
5.66 |
| 2026-06-10 00:00 |
15:17:52.65 |
-49:19:01.0 |
HIP 74831 |
5.41 |
| 2026-06-10 12:00 |
15:17:47.54 |
-49:18:42.0 |
HIP 74831 |
5.31 |
| 2026-06-11 00:00 |
15:17:42.45 |
-49:18:22.8 |
HIP 74831 |
5.36 |
| 2026-06-11 12:00 |
15:17:37.38 |
-49:18:03.4 |
HIP 74831 |
5.55 |
| 2026-06-12 00:00 |
15:17:32.34 |
-49:17:43.8 |
HIP 74831 |
5.88 |
| 2026-06-12 12:00 |
15:17:27.33 |
-49:17:24.1 |
HIP 74831 |
6.31 |
| 2026-06-13 00:00 |
15:17:22.34 |
-49:17:04.1 |
HIP 74831 |
6.84 |
| 2026-06-13 12:00 |
15:17:17.38 |
-49:16:44.1 |
HIP 74831 |
7.43 |
| 2026-06-14 00:00 |
15:17:12.44 |
-49:16:23.8 |
HIP 74831 |
8.07 |
| 2026-06-14 12:00 |
15:17:07.53 |
-49:16:03.4 |
HIP 74831 |
8.76 |
| 2026-06-15 00:00 |
15:17:02.65 |
-49:15:42.8 |
HIP 74831 |
9.47 |
| 2026-06-15 12:00 |
15:16:57.79 |
-49:15:22.1 |
HIP 74831 |
10.21 |
| 2026-06-16 00:00 |
15:16:52.97 |
-49:15:01.2 |
HIP 74831 |
10.96 |
| 2026-06-16 12:00 |
15:16:48.17 |
-49:14:40.1 |
HIP 74831 |
11.73 |
| 2026-06-17 00:00 |
15:16:43.40 |
-49:14:18.9 |
HIP 74831 |
12.51 |
| 2026-06-17 12:00 |
15:16:38.66 |
-49:13:57.6 |
HIP 74831 |
13.30 |
| 2026-06-18 00:00 |
15:16:33.95 |
-49:13:36.1 |
HIP 74831 |
14.09 |
| 2026-06-18 12:00 |
15:16:29.27 |
-49:13:14.4 |
HIP 74831 |
14.89 |
| 2026-06-19 00:00 |
15:16:24.62 |
-49:12:52.6 |
HIP 74831 |
15.69 |
| 2026-06-19 12:00 |
15:16:20.00 |
-49:12:30.7 |
HIP 74831 |
16.49 |
| 2026-06-20 00:00 |
15:16:15.41 |
-49:12:08.6 |
HIP 74831 |
17.29 |
| 2026-06-20 12:00 |
15:16:10.85 |
-49:11:46.4 |
HIP 74831 |
18.10 |
| 2026-06-21 00:00 |
15:16:06.32 |
-49:11:24.1 |
HIP 74831 |
18.90 |
| 2026-06-21 12:00 |
15:16:01.83 |
-49:11:01.6 |
HIP 74831 |
19.71 |
| 2026-06-22 00:00 |
15:15:57.37 |
-49:10:39.0 |
HIP 74831 |
20.51 |