297P/Beshore
メタデータ
| 項目 |
値 |
| Designation |
297P/Beshore |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-03-21T00:41:22.073280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:17Z |
| Obs used |
569 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
20.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-02-28.0000000 |
| e |
0.30860610 |
| q (au) |
2.408841 |
| a (au) |
3.484036 |
| i (deg) |
10.263390 |
| Ω (om, deg) |
98.285080 |
| ω (w, deg) |
131.820042 |
| M (ma, deg) |
52.131741 |
等級
散乱 + 全体線形
$$
M_a = (14.803 + 3.805\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.803 |
| n |
3.805 |
| gf |
0.800 |
| gb |
-0.883 |
| k |
0.998 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
07:09:57.49 |
+28:10:08.5 |
HIP 34626 |
24.77 |
| 2026-02-03 12:00 |
07:09:37.49 |
+28:11:08.0 |
HIP 34626 |
25.12 |
| 2026-02-04 00:00 |
07:09:17.69 |
+28:12:06.6 |
HIP 34367 |
24.90 |
| 2026-02-04 12:00 |
07:08:58.12 |
+28:13:04.1 |
HIP 34367 |
20.69 |
| 2026-02-05 00:00 |
07:08:38.76 |
+28:14:00.6 |
HIP 34367 |
16.63 |
| 2026-02-05 12:00 |
07:08:19.62 |
+28:14:56.1 |
HIP 34367 |
12.81 |
| 2026-02-06 00:00 |
07:08:00.71 |
+28:15:50.6 |
HIP 34367 |
9.47 |
| 2026-02-06 12:00 |
07:07:42.02 |
+28:16:44.1 |
HIP 34367 |
7.20 |
| 2026-02-07 00:00 |
07:07:23.57 |
+28:17:36.6 |
HIP 34367 |
7.01 |
| 2026-02-07 12:00 |
07:07:05.36 |
+28:18:28.0 |
HIP 34304 |
7.17 |
| 2026-02-08 00:00 |
07:06:47.39 |
+28:19:18.5 |
HIP 34304 |
6.45 |
| 2026-02-08 12:00 |
07:06:29.66 |
+28:20:07.9 |
HIP 34304 |
7.99 |
| 2026-02-09 00:00 |
07:06:12.18 |
+28:20:56.4 |
HIP 34264 |
9.43 |
| 2026-02-09 12:00 |
07:05:54.95 |
+28:21:43.8 |
HIP 34264 |
10.79 |
| 2026-02-10 00:00 |
07:05:37.97 |
+28:22:30.3 |
HIP 34264 |
13.15 |
| 2026-02-10 12:00 |
07:05:21.25 |
+28:23:15.8 |
HIP 34264 |
16.03 |
| 2026-02-11 00:00 |
07:05:04.79 |
+28:24:00.4 |
HIP 34264 |
19.16 |
| 2026-02-11 12:00 |
07:04:48.60 |
+28:24:43.9 |
HIP 34264 |
22.41 |
| 2026-02-12 00:00 |
07:04:32.67 |
+28:25:26.5 |
HIP 34264 |
25.70 |
| 2026-02-12 12:00 |
07:04:17.00 |
+28:26:08.1 |
HIP 34264 |
29.00 |
| 2026-02-13 00:00 |
07:04:01.61 |
+28:26:48.8 |
HIP 34264 |
32.28 |
| 2026-02-13 12:00 |
07:03:46.50 |
+28:27:28.5 |
HIP 33923 |
33.23 |
| 2026-02-14 00:00 |
07:03:31.66 |
+28:28:07.2 |
HIP 33923 |
30.95 |
| 2026-02-14 12:00 |
07:03:17.11 |
+28:28:45.0 |
HIP 33923 |
28.90 |
| 2026-02-15 00:00 |
07:03:02.83 |
+28:29:21.9 |
HIP 33923 |
27.14 |
| 2026-02-15 12:00 |
07:02:48.84 |
+28:29:57.9 |
HIP 33923 |
25.68 |
| 2026-02-16 00:00 |
07:02:35.14 |
+28:30:32.9 |
HIP 33923 |
24.55 |
| 2026-02-16 12:00 |
07:02:21.73 |
+28:31:07.0 |
HIP 33923 |
23.79 |
| 2026-02-17 00:00 |
07:02:08.62 |
+28:31:40.2 |
HIP 33923 |
23.39 |
| 2026-02-17 12:00 |
07:01:55.79 |
+28:32:12.5 |
HIP 33923 |
23.35 |
| 2026-02-18 00:00 |
07:01:43.27 |
+28:32:43.9 |
HIP 33923 |
23.66 |
| 2026-02-18 12:00 |
07:01:31.04 |
+28:33:14.4 |
HIP 33923 |
24.27 |
| 2026-02-19 00:00 |
07:01:19.11 |
+28:33:44.0 |
HIP 33923 |
25.14 |
| 2026-02-19 12:00 |
07:01:07.49 |
+28:34:12.7 |
HIP 33923 |
26.22 |
| 2026-02-20 00:00 |
07:00:56.17 |
+28:34:40.6 |
HIP 33662 |
25.60 |
| 2026-02-20 12:00 |
07:00:45.16 |
+28:35:07.6 |
HIP 33662 |
24.32 |
| 2026-02-21 00:00 |
07:00:34.45 |
+28:35:33.8 |
HIP 33662 |
23.26 |
| 2026-02-21 12:00 |
07:00:24.06 |
+28:35:59.0 |
HIP 33662 |
22.42 |
| 2026-02-22 00:00 |
07:00:13.97 |
+28:36:23.5 |
HIP 33662 |
21.81 |
| 2026-02-22 12:00 |
07:00:04.20 |
+28:36:47.1 |
HIP 33662 |
21.44 |
| 2026-02-23 00:00 |
06:59:54.74 |
+28:37:09.9 |
HIP 33662 |
21.28 |
| 2026-02-23 12:00 |
06:59:45.59 |
+28:37:31.9 |
HIP 33662 |
21.32 |
| 2026-02-24 00:00 |
06:59:36.75 |
+28:37:53.0 |
HIP 33662 |
21.55 |