メタデータ
| 項目 |
値 |
| Designation |
268P/Bernardi |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-04-26T21:23:12.413760Z |
| Orbit solution date (soln_date, UTC) |
2026-04-27T13:42:34Z |
| Obs used |
218 |
| NEO |
- |
| M1 |
17.200 |
| 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) |
2016-08-31.0000000 |
| e |
0.46979297 |
| q (au) |
2.418605 |
| a (au) |
4.561624 |
| i (deg) |
16.096802 |
| Ω (om, deg) |
127.628210 |
| ω (w, deg) |
0.311064 |
| M (ma, deg) |
49.783578 |
等級
散乱 + 全体線形
$$
M_a = (16.702 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.702 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.806 |
| k |
0.998 |
| 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
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 |
15:32:04.91 |
+00:36:26.8 |
HIP 76031 |
17.47 |
| 2026-06-01 12:00 |
15:31:47.33 |
+00:36:10.1 |
HIP 76031 |
16.89 |
| 2026-06-02 00:00 |
15:31:29.87 |
+00:35:51.9 |
HIP 75999 |
15.83 |
| 2026-06-02 12:00 |
15:31:12.53 |
+00:35:31.9 |
HIP 75999 |
15.81 |
| 2026-06-03 00:00 |
15:30:55.32 |
+00:35:10.3 |
HIP 75999 |
16.96 |
| 2026-06-03 12:00 |
15:30:38.25 |
+00:34:47.1 |
HIP 75999 |
19.05 |
| 2026-06-04 00:00 |
15:30:21.30 |
+00:34:22.2 |
HIP 75999 |
21.79 |
| 2026-06-04 12:00 |
15:30:04.49 |
+00:33:55.7 |
HIP 75756 |
23.01 |
| 2026-06-05 00:00 |
15:29:47.83 |
+00:33:27.5 |
HIP 75756 |
18.94 |
| 2026-06-05 12:00 |
15:29:31.30 |
+00:32:57.7 |
HIP 75756 |
14.98 |
| 2026-06-06 00:00 |
15:29:14.91 |
+00:32:26.3 |
HIP 75756 |
11.21 |
| 2026-06-06 12:00 |
15:28:58.67 |
+00:31:53.2 |
HIP 75756 |
7.86 |
| 2026-06-07 00:00 |
15:28:42.58 |
+00:31:18.5 |
HIP 75756 |
5.65 |
| 2026-06-07 12:00 |
15:28:26.64 |
+00:30:42.2 |
HIP 75756 |
5.94 |
| 2026-06-08 00:00 |
15:28:10.85 |
+00:30:04.4 |
HIP 75756 |
8.42 |
| 2026-06-08 12:00 |
15:27:55.22 |
+00:29:24.9 |
HIP 75756 |
11.76 |
| 2026-06-09 00:00 |
15:27:39.75 |
+00:28:43.8 |
HIP 75756 |
15.38 |
| 2026-06-09 12:00 |
15:27:24.43 |
+00:28:01.1 |
HIP 75756 |
19.09 |
| 2026-06-10 00:00 |
15:27:09.28 |
+00:27:16.8 |
HIP 75756 |
22.84 |
| 2026-06-10 12:00 |
15:26:54.29 |
+00:26:31.0 |
HIP 75656 |
24.92 |
| 2026-06-11 00:00 |
15:26:39.47 |
+00:25:43.5 |
HIP 75656 |
26.98 |
| 2026-06-11 12:00 |
15:26:24.82 |
+00:24:54.5 |
HIP 75455 |
27.23 |
| 2026-06-12 00:00 |
15:26:10.34 |
+00:24:04.0 |
HIP 75455 |
24.86 |
| 2026-06-12 12:00 |
15:25:56.03 |
+00:23:11.9 |
HIP 75455 |
22.91 |
| 2026-06-13 00:00 |
15:25:41.90 |
+00:22:18.2 |
HIP 75455 |
21.46 |
| 2026-06-13 12:00 |
15:25:27.95 |
+00:21:23.0 |
HIP 75455 |
20.60 |
| 2026-06-14 00:00 |
15:25:14.17 |
+00:20:26.3 |
HIP 75455 |
20.39 |
| 2026-06-14 12:00 |
15:25:00.58 |
+00:19:28.1 |
HIP 75455 |
20.82 |
| 2026-06-15 00:00 |
15:24:47.17 |
+00:18:28.3 |
HIP 75455 |
21.85 |
| 2026-06-15 12:00 |
15:24:33.94 |
+00:17:27.1 |
HIP 75455 |
23.38 |
| 2026-06-16 00:00 |
15:24:20.91 |
+00:16:24.3 |
HIP 75293 |
22.92 |
| 2026-06-16 12:00 |
15:24:08.06 |
+00:15:20.1 |
HIP 75293 |
20.83 |
| 2026-06-17 00:00 |
15:23:55.40 |
+00:14:14.4 |
HIP 75293 |
19.16 |
| 2026-06-17 12:00 |
15:23:42.93 |
+00:13:07.2 |
HIP 75293 |
18.02 |
| 2026-06-18 00:00 |
15:23:30.66 |
+00:11:58.6 |
HIP 75293 |
17.48 |
| 2026-06-18 12:00 |
15:23:18.58 |
+00:10:48.6 |
HIP 75293 |
17.58 |
| 2026-06-19 00:00 |
15:23:06.70 |
+00:09:37.1 |
HIP 75293 |
18.29 |
| 2026-06-19 12:00 |
15:22:55.02 |
+00:08:24.2 |
HIP 75293 |
19.53 |
| 2026-06-20 00:00 |
15:22:43.54 |
+00:07:09.9 |
HIP 75293 |
21.18 |
| 2026-06-20 12:00 |
15:22:32.25 |
+00:05:54.2 |
HIP 75293 |
23.14 |
| 2026-06-21 00:00 |
15:22:21.17 |
+00:04:37.1 |
HIP 75293 |
25.33 |
| 2026-06-21 12:00 |
15:22:10.29 |
+00:03:18.7 |
HIP 75126 |
23.36 |
| 2026-06-22 00:00 |
15:21:59.62 |
+00:01:58.9 |
HIP 75126 |
20.60 |