メタデータ
| 項目 |
値 |
| Designation |
C/1980 O1 (Cernis-Petrauskas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1980-06-22T10:43:23.995200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
20 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
8.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1980-08-29.0000000 |
| e |
1.00000000 |
| q (au) |
0.522897 |
| a (au) |
- |
| i (deg) |
49.068235 |
| Ω (om, deg) |
160.632533 |
| ω (w, deg) |
337.783670 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (7.470 + 3.779\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.470 |
| n |
3.779 |
| gf |
0.800 |
| gb |
-0.765 |
| 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) |
| 2026-03-26 00:00 |
20:57:12.22 |
+07:10:54.6 |
HIP 103490 |
21.24 |
| 2026-03-26 12:00 |
20:57:13.21 |
+07:11:06.4 |
HIP 103490 |
21.25 |
| 2026-03-27 00:00 |
20:57:14.19 |
+07:11:18.2 |
HIP 103490 |
21.27 |
| 2026-03-27 12:00 |
20:57:15.16 |
+07:11:30.1 |
HIP 103490 |
21.30 |
| 2026-03-28 00:00 |
20:57:16.13 |
+07:11:41.9 |
HIP 103490 |
21.33 |
| 2026-03-28 12:00 |
20:57:17.07 |
+07:11:53.7 |
HIP 103490 |
21.37 |
| 2026-03-29 00:00 |
20:57:18.01 |
+07:12:05.6 |
HIP 103490 |
21.42 |
| 2026-03-29 12:00 |
20:57:18.94 |
+07:12:17.4 |
HIP 103490 |
21.47 |
| 2026-03-30 00:00 |
20:57:19.85 |
+07:12:29.3 |
HIP 103490 |
21.52 |
| 2026-03-30 12:00 |
20:57:20.76 |
+07:12:41.1 |
HIP 103490 |
21.59 |
| 2026-03-31 00:00 |
20:57:21.65 |
+07:12:53.0 |
HIP 103490 |
21.65 |
| 2026-03-31 12:00 |
20:57:22.53 |
+07:13:04.8 |
HIP 103490 |
21.73 |
| 2026-04-01 00:00 |
20:57:23.40 |
+07:13:16.7 |
HIP 103490 |
21.80 |
| 2026-04-01 12:00 |
20:57:24.26 |
+07:13:28.5 |
HIP 103490 |
21.89 |
| 2026-04-02 00:00 |
20:57:25.10 |
+07:13:40.4 |
HIP 103490 |
21.97 |
| 2026-04-02 12:00 |
20:57:25.94 |
+07:13:52.2 |
HIP 103490 |
22.06 |
| 2026-04-03 00:00 |
20:57:26.76 |
+07:14:04.1 |
HIP 103552 |
22.09 |
| 2026-04-03 12:00 |
20:57:27.57 |
+07:14:16.0 |
HIP 103552 |
21.99 |
| 2026-04-04 00:00 |
20:57:28.37 |
+07:14:27.8 |
HIP 103552 |
21.90 |
| 2026-04-04 12:00 |
20:57:29.16 |
+07:14:39.6 |
HIP 103552 |
21.82 |
| 2026-04-05 00:00 |
20:57:29.93 |
+07:14:51.5 |
HIP 103552 |
21.74 |
| 2026-04-05 12:00 |
20:57:30.69 |
+07:15:03.3 |
HIP 103552 |
21.67 |
| 2026-04-06 00:00 |
20:57:31.44 |
+07:15:15.1 |
HIP 103552 |
21.61 |
| 2026-04-06 12:00 |
20:57:32.18 |
+07:15:27.0 |
HIP 103552 |
21.54 |
| 2026-04-07 00:00 |
20:57:32.91 |
+07:15:38.8 |
HIP 103552 |
21.49 |
| 2026-04-07 12:00 |
20:57:33.62 |
+07:15:50.6 |
HIP 103552 |
21.44 |
| 2026-04-08 00:00 |
20:57:34.32 |
+07:16:02.4 |
HIP 103552 |
21.40 |
| 2026-04-08 12:00 |
20:57:35.01 |
+07:16:14.2 |
HIP 103552 |
21.36 |
| 2026-04-09 00:00 |
20:57:35.69 |
+07:16:25.9 |
HIP 103552 |
21.33 |
| 2026-04-09 12:00 |
20:57:36.35 |
+07:16:37.7 |
HIP 103552 |
21.30 |
| 2026-04-10 00:00 |
20:57:37.01 |
+07:16:49.4 |
HIP 103552 |
21.28 |
| 2026-04-10 12:00 |
20:57:37.64 |
+07:17:01.2 |
HIP 103552 |
21.26 |
| 2026-04-11 00:00 |
20:57:38.27 |
+07:17:12.9 |
HIP 103552 |
21.25 |
| 2026-04-11 12:00 |
20:57:38.88 |
+07:17:24.6 |
HIP 103552 |
21.25 |
| 2026-04-12 00:00 |
20:57:39.49 |
+07:17:36.2 |
HIP 103552 |
21.25 |
| 2026-04-12 12:00 |
20:57:40.07 |
+07:17:47.9 |
HIP 103552 |
21.25 |
| 2026-04-13 00:00 |
20:57:40.65 |
+07:17:59.6 |
HIP 103552 |
21.26 |
| 2026-04-13 12:00 |
20:57:41.21 |
+07:18:11.2 |
HIP 103552 |
21.28 |
| 2026-04-14 00:00 |
20:57:41.76 |
+07:18:22.8 |
HIP 103552 |
21.30 |
| 2026-04-14 12:00 |
20:57:42.30 |
+07:18:34.4 |
HIP 103552 |
21.32 |
| 2026-04-15 00:00 |
20:57:42.82 |
+07:18:45.9 |
HIP 103552 |
21.35 |
| 2026-04-15 12:00 |
20:57:43.33 |
+07:18:57.5 |
HIP 103552 |
21.39 |
| 2026-04-16 00:00 |
20:57:43.83 |
+07:19:09.0 |
HIP 103552 |
21.42 |