メタデータ
| 項目 |
値 |
| Designation |
283P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-04-06T23:45:57.098880Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:14:11Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
16.700 |
| 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) |
2012-03-13.0000000 |
| e |
0.48567912 |
| q (au) |
2.126445 |
| a (au) |
4.134471 |
| i (deg) |
14.464365 |
| Ω (om, deg) |
161.248171 |
| ω (w, deg) |
21.995380 |
| M (ma, deg) |
314.277725 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
01:20:32.76 |
+01:10:28.2 |
HIP 6112 |
33.44 |
| 2026-06-01 12:00 |
01:20:48.83 |
+01:11:23.2 |
HIP 6112 |
37.52 |
| 2026-06-02 00:00 |
01:21:04.82 |
+01:12:17.4 |
HIP 6432 |
38.85 |
| 2026-06-02 12:00 |
01:21:20.74 |
+01:13:11.0 |
HIP 6432 |
35.87 |
| 2026-06-03 00:00 |
01:21:36.59 |
+01:14:03.9 |
HIP 6432 |
33.15 |
| 2026-06-03 12:00 |
01:21:52.37 |
+01:14:56.0 |
HIP 6432 |
30.74 |
| 2026-06-04 00:00 |
01:22:08.08 |
+01:15:47.4 |
HIP 6432 |
28.72 |
| 2026-06-04 12:00 |
01:22:23.71 |
+01:16:38.2 |
HIP 6432 |
27.15 |
| 2026-06-05 00:00 |
01:22:39.26 |
+01:17:28.1 |
HIP 6432 |
26.12 |
| 2026-06-05 12:00 |
01:22:54.74 |
+01:18:17.4 |
HIP 6432 |
25.69 |
| 2026-06-06 00:00 |
01:23:10.14 |
+01:19:06.0 |
HIP 6432 |
25.86 |
| 2026-06-06 12:00 |
01:23:25.47 |
+01:19:53.8 |
HIP 6432 |
26.62 |
| 2026-06-07 00:00 |
01:23:40.72 |
+01:20:40.8 |
HIP 6653 |
25.79 |
| 2026-06-07 12:00 |
01:23:55.89 |
+01:21:27.2 |
HIP 6653 |
21.93 |
| 2026-06-08 00:00 |
01:24:10.98 |
+01:22:12.7 |
HIP 6653 |
18.11 |
| 2026-06-08 12:00 |
01:24:25.99 |
+01:22:57.6 |
HIP 6653 |
14.31 |
| 2026-06-09 00:00 |
01:24:40.92 |
+01:23:41.6 |
HIP 6653 |
10.56 |
| 2026-06-09 12:00 |
01:24:55.77 |
+01:24:25.0 |
HIP 6653 |
6.88 |
| 2026-06-10 00:00 |
01:25:10.54 |
+01:25:07.5 |
HIP 6653 |
3.48 |
| 2026-06-10 12:00 |
01:25:25.22 |
+01:25:49.3 |
HIP 6653 |
2.25 |
| 2026-06-11 00:00 |
01:25:39.82 |
+01:26:30.3 |
HIP 6653 |
5.07 |
| 2026-06-11 12:00 |
01:25:54.34 |
+01:27:10.5 |
HIP 6653 |
8.58 |
| 2026-06-12 00:00 |
01:26:08.77 |
+01:27:50.0 |
HIP 6653 |
12.17 |
| 2026-06-12 12:00 |
01:26:23.11 |
+01:28:28.7 |
HIP 6750 |
13.00 |
| 2026-06-13 00:00 |
01:26:37.37 |
+01:29:06.6 |
HIP 6750 |
11.92 |
| 2026-06-13 12:00 |
01:26:51.54 |
+01:29:43.7 |
HIP 6750 |
11.87 |
| 2026-06-14 00:00 |
01:27:05.62 |
+01:30:20.0 |
HIP 6750 |
12.86 |
| 2026-06-14 12:00 |
01:27:19.61 |
+01:30:55.5 |
HIP 6750 |
14.65 |
| 2026-06-15 00:00 |
01:27:33.51 |
+01:31:30.1 |
HIP 6750 |
16.97 |
| 2026-06-15 12:00 |
01:27:47.32 |
+01:32:04.0 |
HIP 6750 |
19.63 |
| 2026-06-16 00:00 |
01:28:01.04 |
+01:32:37.1 |
HIP 6750 |
22.49 |
| 2026-06-16 12:00 |
01:28:14.67 |
+01:33:09.4 |
HIP 6750 |
25.48 |
| 2026-06-17 00:00 |
01:28:28.20 |
+01:33:40.8 |
HIP 6750 |
28.55 |
| 2026-06-17 12:00 |
01:28:41.64 |
+01:34:11.4 |
HIP 7025 |
30.21 |
| 2026-06-18 00:00 |
01:28:54.99 |
+01:34:41.2 |
HIP 7025 |
27.45 |
| 2026-06-18 12:00 |
01:29:08.23 |
+01:35:10.2 |
HIP 7025 |
24.86 |
| 2026-06-19 00:00 |
01:29:21.39 |
+01:35:38.3 |
HIP 7025 |
22.48 |
| 2026-06-19 12:00 |
01:29:34.44 |
+01:36:05.6 |
HIP 7025 |
20.36 |
| 2026-06-20 00:00 |
01:29:47.40 |
+01:36:32.1 |
HIP 7025 |
18.60 |
| 2026-06-20 12:00 |
01:30:00.26 |
+01:36:57.7 |
HIP 7025 |
17.28 |
| 2026-06-21 00:00 |
01:30:13.03 |
+01:37:22.5 |
HIP 7025 |
16.49 |
| 2026-06-21 12:00 |
01:30:25.69 |
+01:37:46.5 |
HIP 7025 |
16.30 |
| 2026-06-22 00:00 |
01:30:38.25 |
+01:38:09.6 |
HIP 7025 |
16.71 |