メタデータ
| 項目 |
値 |
| Designation |
C/1959 X1 (Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-11-13T05:29:53.125440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
19 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1960-05-18.0000000 |
| e |
0.99998877 |
| q (au) |
1.253241 |
| a (au) |
111604.932920 |
| i (deg) |
19.636163 |
| Ω (om, deg) |
100.618812 |
| ω (w, deg) |
84.688954 |
| M (ma, deg) |
0.000005 |
等級
散乱 + 全体線形
$$
M_a = (12.555 + 3.942\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.555 |
| n |
3.942 |
| gf |
0.994 |
| gb |
-0.680 |
| k |
0.811 |
| 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 |
23:59:06.99 |
-20:29:35.4 |
HIP 118181 |
14.81 |
| 2026-07-29 12:00 |
23:59:06.25 |
-20:29:45.2 |
HIP 118181 |
14.81 |
| 2026-07-30 00:00 |
23:59:05.49 |
-20:29:55.1 |
HIP 118181 |
14.80 |
| 2026-07-30 12:00 |
23:59:04.73 |
-20:30:04.9 |
HIP 118181 |
14.80 |
| 2026-07-31 00:00 |
23:59:03.96 |
-20:30:14.8 |
HIP 118181 |
14.81 |
| 2026-07-31 12:00 |
23:59:03.18 |
-20:30:24.6 |
HIP 118181 |
14.81 |
| 2026-08-01 00:00 |
23:59:02.39 |
-20:30:34.5 |
HIP 118181 |
14.82 |
| 2026-08-01 12:00 |
23:59:01.60 |
-20:30:44.4 |
HIP 118181 |
14.83 |
| 2026-08-02 00:00 |
23:59:00.79 |
-20:30:54.3 |
HIP 118181 |
14.84 |
| 2026-08-02 12:00 |
23:58:59.98 |
-20:31:04.2 |
HIP 118181 |
14.86 |
| 2026-08-03 00:00 |
23:58:59.16 |
-20:31:14.2 |
HIP 118181 |
14.88 |
| 2026-08-03 12:00 |
23:58:58.33 |
-20:31:24.1 |
HIP 118181 |
14.91 |
| 2026-08-04 00:00 |
23:58:57.49 |
-20:31:34.1 |
HIP 118181 |
14.93 |
| 2026-08-04 12:00 |
23:58:56.64 |
-20:31:44.0 |
HIP 118181 |
14.97 |
| 2026-08-05 00:00 |
23:58:55.79 |
-20:31:54.0 |
HIP 118181 |
15.00 |
| 2026-08-05 12:00 |
23:58:54.92 |
-20:32:04.0 |
HIP 118181 |
15.04 |
| 2026-08-06 00:00 |
23:58:54.05 |
-20:32:13.9 |
HIP 118181 |
15.08 |
| 2026-08-06 12:00 |
23:58:53.17 |
-20:32:23.9 |
HIP 118181 |
15.12 |
| 2026-08-07 00:00 |
23:58:52.28 |
-20:32:33.9 |
HIP 118181 |
15.17 |
| 2026-08-07 12:00 |
23:58:51.39 |
-20:32:43.9 |
HIP 118181 |
15.23 |
| 2026-08-08 00:00 |
23:58:50.48 |
-20:32:53.9 |
HIP 118181 |
15.28 |
| 2026-08-08 12:00 |
23:58:49.57 |
-20:33:03.9 |
HIP 118181 |
15.34 |
| 2026-08-09 00:00 |
23:58:48.65 |
-20:33:13.9 |
HIP 118181 |
15.41 |
| 2026-08-09 12:00 |
23:58:47.73 |
-20:33:24.0 |
HIP 118181 |
15.48 |
| 2026-08-10 00:00 |
23:58:46.79 |
-20:33:34.0 |
HIP 118181 |
15.55 |
| 2026-08-10 12:00 |
23:58:45.85 |
-20:33:44.0 |
HIP 118181 |
15.62 |
| 2026-08-11 00:00 |
23:58:44.90 |
-20:33:54.0 |
HIP 118181 |
15.70 |
| 2026-08-11 12:00 |
23:58:43.94 |
-20:34:04.0 |
HIP 118181 |
15.79 |
| 2026-08-12 00:00 |
23:58:42.98 |
-20:34:14.0 |
HIP 118181 |
15.87 |
| 2026-08-12 12:00 |
23:58:42.00 |
-20:34:24.0 |
HIP 118181 |
15.96 |
| 2026-08-13 00:00 |
23:58:41.02 |
-20:34:34.0 |
HIP 118181 |
16.06 |
| 2026-08-13 12:00 |
23:58:40.04 |
-20:34:44.0 |
HIP 118181 |
16.16 |
| 2026-08-14 00:00 |
23:58:39.04 |
-20:34:54.0 |
HIP 118181 |
16.26 |
| 2026-08-14 12:00 |
23:58:38.04 |
-20:35:04.0 |
HIP 118181 |
16.37 |
| 2026-08-15 00:00 |
23:58:37.04 |
-20:35:14.0 |
HIP 118181 |
16.48 |
| 2026-08-15 12:00 |
23:58:36.02 |
-20:35:23.9 |
HIP 118181 |
16.60 |
| 2026-08-16 00:00 |
23:58:35.00 |
-20:35:33.9 |
HIP 118181 |
16.71 |
| 2026-08-16 12:00 |
23:58:33.97 |
-20:35:43.8 |
HIP 118181 |
16.84 |
| 2026-08-17 00:00 |
23:58:32.94 |
-20:35:53.8 |
HIP 118181 |
16.96 |
| 2026-08-17 12:00 |
23:58:31.90 |
-20:36:03.7 |
HIP 118181 |
17.09 |
| 2026-08-18 00:00 |
23:58:30.85 |
-20:36:13.6 |
HIP 118181 |
17.23 |
| 2026-08-18 12:00 |
23:58:29.80 |
-20:36:23.5 |
HIP 118181 |
17.36 |
| 2026-08-19 00:00 |
23:58:28.74 |
-20:36:33.4 |
HIP 118181 |
17.50 |