メタデータ
| 項目 |
値 |
| Designation |
C/1980 E1 (Bowell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1982-03-12T06:53:06.725760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
187 |
| NEO |
- |
| M1 |
5.800 |
| K1 |
7.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1982-01-03.0000000 |
| e |
1.05773287 |
| q (au) |
3.363940 |
| a (au) |
-58.267328 |
| i (deg) |
1.661742 |
| Ω (om, deg) |
114.557492 |
| ω (w, deg) |
135.083294 |
| M (ma, deg) |
-0.151323 |
等級
散乱 + 全体線形
$$
M_a = (6.115 + 2.337\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.115 |
| n |
2.337 |
| gf |
0.926 |
| gb |
-0.841 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1980-02-11 |
1981-05-06 |
+4.8533 |
-3.657 |
| 1981-05-06 |
1982-03-05 |
-7.7973 |
+4.010 |
| 1982-03-15 |
1982-10-11 |
+4.0331 |
-2.092 |
| 1982-10-11 |
1986-12-02 |
-0.1566 |
+0.588 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
02:26:50.63 |
+12:51:00.0 |
HIP 11369 |
6.47 |
| 2026-03-26 12:00 |
02:26:51.94 |
+12:51:06.9 |
HIP 11369 |
6.71 |
| 2026-03-27 00:00 |
02:26:53.26 |
+12:51:13.7 |
HIP 11369 |
6.96 |
| 2026-03-27 12:00 |
02:26:54.59 |
+12:51:20.7 |
HIP 11369 |
7.22 |
| 2026-03-28 00:00 |
02:26:55.92 |
+12:51:27.6 |
HIP 11369 |
7.48 |
| 2026-03-28 12:00 |
02:26:57.26 |
+12:51:34.6 |
HIP 11369 |
7.75 |
| 2026-03-29 00:00 |
02:26:58.61 |
+12:51:41.5 |
HIP 11369 |
8.03 |
| 2026-03-29 12:00 |
02:26:59.96 |
+12:51:48.6 |
HIP 11369 |
8.32 |
| 2026-03-30 00:00 |
02:27:01.32 |
+12:51:55.6 |
HIP 11369 |
8.61 |
| 2026-03-30 12:00 |
02:27:02.69 |
+12:52:02.7 |
HIP 11369 |
8.91 |
| 2026-03-31 00:00 |
02:27:04.06 |
+12:52:09.8 |
HIP 11369 |
9.21 |
| 2026-03-31 12:00 |
02:27:05.43 |
+12:52:16.9 |
HIP 11369 |
9.52 |
| 2026-04-01 00:00 |
02:27:06.82 |
+12:52:24.0 |
HIP 11369 |
9.84 |
| 2026-04-01 12:00 |
02:27:08.21 |
+12:52:31.2 |
HIP 11369 |
10.15 |
| 2026-04-02 00:00 |
02:27:09.60 |
+12:52:38.4 |
HIP 11369 |
10.47 |
| 2026-04-02 12:00 |
02:27:11.01 |
+12:52:45.6 |
HIP 11461 |
10.71 |
| 2026-04-03 00:00 |
02:27:12.41 |
+12:52:52.8 |
HIP 11461 |
10.34 |
| 2026-04-03 12:00 |
02:27:13.83 |
+12:53:00.1 |
HIP 11461 |
9.98 |
| 2026-04-04 00:00 |
02:27:15.24 |
+12:53:07.3 |
HIP 11461 |
9.62 |
| 2026-04-04 12:00 |
02:27:16.67 |
+12:53:14.6 |
HIP 11461 |
9.25 |
| 2026-04-05 00:00 |
02:27:18.10 |
+12:53:21.9 |
HIP 11461 |
8.89 |
| 2026-04-05 12:00 |
02:27:19.53 |
+12:53:29.3 |
HIP 11461 |
8.52 |
| 2026-04-06 00:00 |
02:27:20.97 |
+12:53:36.6 |
HIP 11461 |
8.16 |
| 2026-04-06 12:00 |
02:27:22.42 |
+12:53:44.0 |
HIP 11461 |
7.79 |
| 2026-04-07 00:00 |
02:27:23.87 |
+12:53:51.4 |
HIP 11461 |
7.42 |
| 2026-04-07 12:00 |
02:27:25.32 |
+12:53:58.8 |
HIP 11461 |
7.05 |
| 2026-04-08 00:00 |
02:27:26.78 |
+12:54:06.2 |
HIP 11461 |
6.68 |
| 2026-04-08 12:00 |
02:27:28.24 |
+12:54:13.7 |
HIP 11461 |
6.31 |
| 2026-04-09 00:00 |
02:27:29.71 |
+12:54:21.1 |
HIP 11461 |
5.94 |
| 2026-04-09 12:00 |
02:27:31.18 |
+12:54:28.6 |
HIP 11461 |
5.57 |
| 2026-04-10 00:00 |
02:27:32.66 |
+12:54:36.1 |
HIP 11461 |
5.20 |
| 2026-04-10 12:00 |
02:27:34.14 |
+12:54:43.6 |
HIP 11461 |
4.83 |
| 2026-04-11 00:00 |
02:27:35.63 |
+12:54:51.1 |
HIP 11461 |
4.46 |
| 2026-04-11 12:00 |
02:27:37.12 |
+12:54:58.7 |
HIP 11461 |
4.09 |
| 2026-04-12 00:00 |
02:27:38.61 |
+12:55:06.2 |
HIP 11461 |
3.73 |
| 2026-04-12 12:00 |
02:27:40.11 |
+12:55:13.8 |
HIP 11461 |
3.37 |
| 2026-04-13 00:00 |
02:27:41.61 |
+12:55:21.4 |
HIP 11461 |
3.01 |
| 2026-04-13 12:00 |
02:27:43.11 |
+12:55:28.9 |
HIP 11461 |
2.67 |
| 2026-04-14 00:00 |
02:27:44.62 |
+12:55:36.5 |
HIP 11461 |
2.33 |
| 2026-04-14 12:00 |
02:27:46.13 |
+12:55:44.1 |
HIP 11461 |
2.02 |
| 2026-04-15 00:00 |
02:27:47.65 |
+12:55:51.8 |
HIP 11461 |
1.74 |
| 2026-04-15 12:00 |
02:27:49.17 |
+12:55:59.4 |
HIP 11461 |
1.50 |
| 2026-04-16 00:00 |
02:27:50.69 |
+12:56:07.0 |
HIP 11461 |
1.34 |