C/1974 O1 (Cesco)
メタデータ
| 項目 |
値 |
| Designation |
C/1974 O1 (Cesco) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1974-05-12T23:37:48.135360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
18 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1974-08-21.0000000 |
| e |
0.97938205 |
| q (au) |
1.372893 |
| a (au) |
66.587290 |
| i (deg) |
173.158463 |
| Ω (om, deg) |
165.740646 |
| ω (w, deg) |
176.764065 |
| M (ma, deg) |
0.181420 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
12:01:13.49 |
-02:03:02.2 |
HIP 58603 |
17.21 |
| 2026-02-03 12:00 |
12:01:12.31 |
-02:02:55.2 |
HIP 58603 |
17.05 |
| 2026-02-04 00:00 |
12:01:11.12 |
-02:02:48.0 |
HIP 58603 |
16.88 |
| 2026-02-04 12:00 |
12:01:09.92 |
-02:02:40.8 |
HIP 58603 |
16.73 |
| 2026-02-05 00:00 |
12:01:08.71 |
-02:02:33.5 |
HIP 58603 |
16.57 |
| 2026-02-05 12:00 |
12:01:07.49 |
-02:02:26.1 |
HIP 58603 |
16.42 |
| 2026-02-06 00:00 |
12:01:06.26 |
-02:02:18.7 |
HIP 58603 |
16.27 |
| 2026-02-06 12:00 |
12:01:05.02 |
-02:02:11.2 |
HIP 58603 |
16.13 |
| 2026-02-07 00:00 |
12:01:03.76 |
-02:02:03.6 |
HIP 58603 |
15.99 |
| 2026-02-07 12:00 |
12:01:02.50 |
-02:01:55.9 |
HIP 58603 |
15.85 |
| 2026-02-08 00:00 |
12:01:01.23 |
-02:01:48.2 |
HIP 58603 |
15.72 |
| 2026-02-08 12:00 |
12:00:59.95 |
-02:01:40.4 |
HIP 58603 |
15.60 |
| 2026-02-09 00:00 |
12:00:58.66 |
-02:01:32.5 |
HIP 58603 |
15.48 |
| 2026-02-09 12:00 |
12:00:57.36 |
-02:01:24.6 |
HIP 58603 |
15.37 |
| 2026-02-10 00:00 |
12:00:56.05 |
-02:01:16.6 |
HIP 58603 |
15.26 |
| 2026-02-10 12:00 |
12:00:54.73 |
-02:01:08.5 |
HIP 58603 |
15.16 |
| 2026-02-11 00:00 |
12:00:53.40 |
-02:01:00.4 |
HIP 58603 |
15.07 |
| 2026-02-11 12:00 |
12:00:52.07 |
-02:00:52.2 |
HIP 58603 |
14.99 |
| 2026-02-12 00:00 |
12:00:50.72 |
-02:00:43.9 |
HIP 58603 |
14.91 |
| 2026-02-12 12:00 |
12:00:49.36 |
-02:00:35.6 |
HIP 58603 |
14.84 |
| 2026-02-13 00:00 |
12:00:48.00 |
-02:00:27.2 |
HIP 58603 |
14.78 |
| 2026-02-13 12:00 |
12:00:46.62 |
-02:00:18.7 |
HIP 58603 |
14.73 |
| 2026-02-14 00:00 |
12:00:45.24 |
-02:00:10.2 |
HIP 58603 |
14.68 |
| 2026-02-14 12:00 |
12:00:43.85 |
-02:00:01.6 |
HIP 58603 |
14.65 |
| 2026-02-15 00:00 |
12:00:42.45 |
-01:59:53.0 |
HIP 58603 |
14.62 |
| 2026-02-15 12:00 |
12:00:41.04 |
-01:59:44.2 |
HIP 58603 |
14.61 |
| 2026-02-16 00:00 |
12:00:39.63 |
-01:59:35.5 |
HIP 58603 |
14.60 |
| 2026-02-16 12:00 |
12:00:38.20 |
-01:59:26.6 |
HIP 58603 |
14.60 |
| 2026-02-17 00:00 |
12:00:36.77 |
-01:59:17.8 |
HIP 58603 |
14.62 |
| 2026-02-17 12:00 |
12:00:35.33 |
-01:59:08.8 |
HIP 58603 |
14.64 |
| 2026-02-18 00:00 |
12:00:33.88 |
-01:58:59.8 |
HIP 58603 |
14.67 |
| 2026-02-18 12:00 |
12:00:32.43 |
-01:58:50.7 |
HIP 58603 |
14.72 |
| 2026-02-19 00:00 |
12:00:30.96 |
-01:58:41.6 |
HIP 58480 |
14.68 |
| 2026-02-19 12:00 |
12:00:29.49 |
-01:58:32.4 |
HIP 58480 |
14.28 |
| 2026-02-20 00:00 |
12:00:28.02 |
-01:58:23.2 |
HIP 58480 |
13.89 |
| 2026-02-20 12:00 |
12:00:26.53 |
-01:58:13.9 |
HIP 58480 |
13.49 |
| 2026-02-21 00:00 |
12:00:25.04 |
-01:58:04.6 |
HIP 58480 |
13.09 |
| 2026-02-21 12:00 |
12:00:23.54 |
-01:57:55.2 |
HIP 58480 |
12.69 |
| 2026-02-22 00:00 |
12:00:22.03 |
-01:57:45.8 |
HIP 58480 |
12.29 |
| 2026-02-22 12:00 |
12:00:20.52 |
-01:57:36.3 |
HIP 58480 |
11.89 |
| 2026-02-23 00:00 |
12:00:19.00 |
-01:57:26.7 |
HIP 58480 |
11.48 |
| 2026-02-23 12:00 |
12:00:17.48 |
-01:57:17.2 |
HIP 58480 |
11.08 |
| 2026-02-24 00:00 |
12:00:15.94 |
-01:57:07.5 |
HIP 58480 |
10.67 |