メタデータ
| 項目 |
値 |
| Designation |
268P/Bernardi |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-04-26T22:31:48.293760Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:13:20Z |
| Obs used |
212 |
| 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) |
2016-07-05.0000000 |
| e |
0.46984750 |
| q (au) |
2.418721 |
| a (au) |
4.562311 |
| i (deg) |
16.096643 |
| Ω (om, deg) |
127.631061 |
| ω (w, deg) |
0.319263 |
| M (ma, deg) |
44.002476 |
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) |
| 2026-03-26 00:00 |
16:06:26.63 |
-02:08:14.2 |
HIP 78902 |
25.67 |
| 2026-03-26 12:00 |
16:06:22.71 |
-02:06:17.4 |
HIP 78902 |
27.61 |
| 2026-03-27 00:00 |
16:06:18.52 |
-02:04:20.4 |
HIP 78902 |
29.59 |
| 2026-03-27 12:00 |
16:06:14.07 |
-02:02:23.3 |
HIP 78972 |
29.44 |
| 2026-03-28 00:00 |
16:06:09.36 |
-02:00:26.0 |
HIP 78972 |
28.49 |
| 2026-03-28 12:00 |
16:06:04.39 |
-01:58:28.6 |
HIP 78972 |
27.74 |
| 2026-03-29 00:00 |
16:05:59.16 |
-01:56:31.0 |
HIP 78972 |
27.21 |
| 2026-03-29 12:00 |
16:05:53.67 |
-01:54:33.4 |
HIP 78972 |
26.93 |
| 2026-03-30 00:00 |
16:05:47.92 |
-01:52:35.7 |
HIP 78972 |
26.91 |
| 2026-03-30 12:00 |
16:05:41.92 |
-01:50:38.0 |
HIP 78972 |
27.16 |
| 2026-03-31 00:00 |
16:05:35.65 |
-01:48:40.2 |
HIP 78972 |
27.70 |
| 2026-03-31 12:00 |
16:05:29.14 |
-01:46:42.3 |
HIP 78972 |
28.50 |
| 2026-04-01 00:00 |
16:05:22.37 |
-01:44:44.5 |
HIP 78972 |
29.57 |
| 2026-04-01 12:00 |
16:05:15.34 |
-01:42:46.7 |
HIP 78972 |
30.88 |
| 2026-04-02 00:00 |
16:05:08.07 |
-01:40:48.9 |
HIP 78752 |
31.91 |
| 2026-04-02 12:00 |
16:05:00.54 |
-01:38:51.2 |
HIP 78752 |
29.63 |
| 2026-04-03 00:00 |
16:04:52.77 |
-01:36:53.5 |
HIP 78752 |
27.43 |
| 2026-04-03 12:00 |
16:04:44.75 |
-01:34:56.0 |
HIP 78752 |
25.34 |
| 2026-04-04 00:00 |
16:04:36.47 |
-01:32:58.5 |
HIP 78752 |
23.40 |
| 2026-04-04 12:00 |
16:04:27.96 |
-01:31:01.2 |
HIP 78752 |
21.68 |
| 2026-04-05 00:00 |
16:04:19.20 |
-01:29:04.0 |
HIP 78752 |
20.24 |
| 2026-04-05 12:00 |
16:04:10.19 |
-01:27:06.9 |
HIP 78752 |
19.18 |
| 2026-04-06 00:00 |
16:04:00.95 |
-01:25:10.1 |
HIP 78752 |
18.57 |
| 2026-04-06 12:00 |
16:03:51.46 |
-01:23:13.4 |
HIP 78752 |
18.49 |
| 2026-04-07 00:00 |
16:03:41.73 |
-01:21:17.0 |
HIP 78752 |
18.96 |
| 2026-04-07 12:00 |
16:03:31.77 |
-01:19:20.8 |
HIP 78752 |
19.97 |
| 2026-04-08 00:00 |
16:03:21.57 |
-01:17:24.9 |
HIP 78752 |
21.45 |
| 2026-04-08 12:00 |
16:03:11.13 |
-01:15:29.2 |
HIP 78752 |
23.34 |
| 2026-04-09 00:00 |
16:03:00.47 |
-01:13:33.9 |
HIP 78613 |
25.41 |
| 2026-04-09 12:00 |
16:02:49.57 |
-01:11:38.9 |
HIP 78545 |
24.82 |
| 2026-04-10 00:00 |
16:02:38.44 |
-01:09:44.2 |
HIP 78545 |
21.96 |
| 2026-04-10 12:00 |
16:02:27.09 |
-01:07:49.9 |
HIP 78545 |
19.26 |
| 2026-04-11 00:00 |
16:02:15.51 |
-01:05:56.0 |
HIP 78545 |
16.82 |
| 2026-04-11 12:00 |
16:02:03.71 |
-01:04:02.5 |
HIP 78545 |
14.80 |
| 2026-04-12 00:00 |
16:01:51.68 |
-01:02:09.4 |
HIP 78545 |
13.42 |
| 2026-04-12 12:00 |
16:01:39.44 |
-01:00:16.8 |
HIP 78545 |
12.95 |
| 2026-04-13 00:00 |
16:01:26.98 |
-00:58:24.6 |
HIP 78545 |
13.49 |
| 2026-04-13 12:00 |
16:01:14.30 |
-00:56:33.0 |
HIP 78545 |
14.98 |
| 2026-04-14 00:00 |
16:01:01.41 |
-00:54:41.8 |
HIP 78545 |
17.19 |
| 2026-04-14 12:00 |
16:00:48.31 |
-00:52:51.2 |
HIP 78545 |
19.91 |
| 2026-04-15 00:00 |
16:00:35.01 |
-00:51:01.2 |
HIP 78545 |
22.97 |
| 2026-04-15 12:00 |
16:00:21.49 |
-00:49:11.8 |
HIP 78545 |
26.29 |
| 2026-04-16 00:00 |
16:00:07.78 |
-00:47:22.9 |
HIP 78545 |
29.77 |