メタデータ
| 項目 |
値 |
| Designation |
C/1956 E1 (Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1956-04-13T14:37:14.880000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
32 |
| 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) |
1956-04-13.6092000 |
| e |
1.00000000 |
| q (au) |
0.842240 |
| a (au) |
- |
| i (deg) |
147.451900 |
| Ω (om, deg) |
226.715900 |
| ω (w, deg) |
81.001500 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (9.975 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.975 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.938 |
| 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) |
| 2026-07-29 00:00 |
23:42:14.95 |
-35:41:39.0 |
HIP 116910 |
17.51 |
| 2026-07-29 12:00 |
23:42:14.01 |
-35:41:51.0 |
HIP 116910 |
17.28 |
| 2026-07-30 00:00 |
23:42:13.07 |
-35:42:02.9 |
HIP 116910 |
17.04 |
| 2026-07-30 12:00 |
23:42:12.11 |
-35:42:14.9 |
HIP 116910 |
16.80 |
| 2026-07-31 00:00 |
23:42:11.15 |
-35:42:26.8 |
HIP 116910 |
16.57 |
| 2026-07-31 12:00 |
23:42:10.17 |
-35:42:38.7 |
HIP 116910 |
16.33 |
| 2026-08-01 00:00 |
23:42:09.19 |
-35:42:50.6 |
HIP 116910 |
16.10 |
| 2026-08-01 12:00 |
23:42:08.20 |
-35:43:02.5 |
HIP 116910 |
15.87 |
| 2026-08-02 00:00 |
23:42:07.20 |
-35:43:14.3 |
HIP 116910 |
15.64 |
| 2026-08-02 12:00 |
23:42:06.20 |
-35:43:26.1 |
HIP 116910 |
15.41 |
| 2026-08-03 00:00 |
23:42:05.18 |
-35:43:37.9 |
HIP 116910 |
15.19 |
| 2026-08-03 12:00 |
23:42:04.16 |
-35:43:49.7 |
HIP 116910 |
14.96 |
| 2026-08-04 00:00 |
23:42:03.12 |
-35:44:01.4 |
HIP 116910 |
14.74 |
| 2026-08-04 12:00 |
23:42:02.08 |
-35:44:13.1 |
HIP 116910 |
14.52 |
| 2026-08-05 00:00 |
23:42:01.03 |
-35:44:24.8 |
HIP 116910 |
14.31 |
| 2026-08-05 12:00 |
23:41:59.97 |
-35:44:36.4 |
HIP 116910 |
14.09 |
| 2026-08-06 00:00 |
23:41:58.91 |
-35:44:48.1 |
HIP 116910 |
13.89 |
| 2026-08-06 12:00 |
23:41:57.83 |
-35:44:59.7 |
HIP 116910 |
13.68 |
| 2026-08-07 00:00 |
23:41:56.75 |
-35:45:11.2 |
HIP 116910 |
13.48 |
| 2026-08-07 12:00 |
23:41:55.66 |
-35:45:22.8 |
HIP 116910 |
13.28 |
| 2026-08-08 00:00 |
23:41:54.56 |
-35:45:34.3 |
HIP 116910 |
13.08 |
| 2026-08-08 12:00 |
23:41:53.46 |
-35:45:45.7 |
HIP 116910 |
12.89 |
| 2026-08-09 00:00 |
23:41:52.34 |
-35:45:57.2 |
HIP 116910 |
12.71 |
| 2026-08-09 12:00 |
23:41:51.22 |
-35:46:08.6 |
HIP 116910 |
12.53 |
| 2026-08-10 00:00 |
23:41:50.09 |
-35:46:19.9 |
HIP 116910 |
12.35 |
| 2026-08-10 12:00 |
23:41:48.96 |
-35:46:31.2 |
HIP 116910 |
12.18 |
| 2026-08-11 00:00 |
23:41:47.81 |
-35:46:42.5 |
HIP 116910 |
12.02 |
| 2026-08-11 12:00 |
23:41:46.66 |
-35:46:53.8 |
HIP 116910 |
11.86 |
| 2026-08-12 00:00 |
23:41:45.50 |
-35:47:05.0 |
HIP 116910 |
11.71 |
| 2026-08-12 12:00 |
23:41:44.33 |
-35:47:16.1 |
HIP 116910 |
11.56 |
| 2026-08-13 00:00 |
23:41:43.16 |
-35:47:27.3 |
HIP 116910 |
11.42 |
| 2026-08-13 12:00 |
23:41:41.98 |
-35:47:38.3 |
HIP 116910 |
11.29 |
| 2026-08-14 00:00 |
23:41:40.79 |
-35:47:49.4 |
HIP 116910 |
11.17 |
| 2026-08-14 12:00 |
23:41:39.60 |
-35:48:00.4 |
HIP 116910 |
11.05 |
| 2026-08-15 00:00 |
23:41:38.40 |
-35:48:11.3 |
HIP 116910 |
10.95 |
| 2026-08-15 12:00 |
23:41:37.19 |
-35:48:22.2 |
HIP 116910 |
10.85 |
| 2026-08-16 00:00 |
23:41:35.98 |
-35:48:33.1 |
HIP 116910 |
10.76 |
| 2026-08-16 12:00 |
23:41:34.76 |
-35:48:43.9 |
HIP 116910 |
10.68 |
| 2026-08-17 00:00 |
23:41:33.53 |
-35:48:54.6 |
HIP 116910 |
10.61 |
| 2026-08-17 12:00 |
23:41:32.30 |
-35:49:05.3 |
HIP 116910 |
10.55 |
| 2026-08-18 00:00 |
23:41:31.06 |
-35:49:16.0 |
HIP 116910 |
10.50 |
| 2026-08-18 12:00 |
23:41:29.81 |
-35:49:26.6 |
HIP 116910 |
10.45 |
| 2026-08-19 00:00 |
23:41:28.56 |
-35:49:37.2 |
HIP 116910 |
10.42 |