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) |
| 2026-06-01 00:00 |
23:59:24.34 |
-20:15:20.7 |
HIP 118278 |
13.33 |
| 2026-06-01 12:00 |
23:59:24.79 |
-20:15:24.5 |
HIP 118278 |
13.39 |
| 2026-06-02 00:00 |
23:59:25.24 |
-20:15:28.4 |
HIP 118278 |
13.45 |
| 2026-06-02 12:00 |
23:59:25.68 |
-20:15:32.3 |
HIP 118278 |
13.51 |
| 2026-06-03 00:00 |
23:59:26.11 |
-20:15:36.3 |
HIP 118278 |
13.57 |
| 2026-06-03 12:00 |
23:59:26.53 |
-20:15:40.4 |
HIP 118278 |
13.64 |
| 2026-06-04 00:00 |
23:59:26.93 |
-20:15:44.6 |
HIP 118278 |
13.70 |
| 2026-06-04 12:00 |
23:59:27.33 |
-20:15:48.8 |
HIP 118278 |
13.77 |
| 2026-06-05 00:00 |
23:59:27.72 |
-20:15:53.1 |
HIP 118278 |
13.84 |
| 2026-06-05 12:00 |
23:59:28.09 |
-20:15:57.5 |
HIP 118278 |
13.92 |
| 2026-06-06 00:00 |
23:59:28.46 |
-20:16:02.0 |
HIP 118278 |
13.99 |
| 2026-06-06 12:00 |
23:59:28.81 |
-20:16:06.5 |
HIP 118278 |
14.07 |
| 2026-06-07 00:00 |
23:59:29.16 |
-20:16:11.1 |
HIP 118278 |
14.15 |
| 2026-06-07 12:00 |
23:59:29.49 |
-20:16:15.8 |
HIP 118278 |
14.23 |
| 2026-06-08 00:00 |
23:59:29.82 |
-20:16:20.6 |
HIP 118278 |
14.31 |
| 2026-06-08 12:00 |
23:59:30.13 |
-20:16:25.4 |
HIP 118278 |
14.39 |
| 2026-06-09 00:00 |
23:59:30.43 |
-20:16:30.3 |
HIP 118278 |
14.47 |
| 2026-06-09 12:00 |
23:59:30.73 |
-20:16:35.3 |
HIP 118278 |
14.56 |
| 2026-06-10 00:00 |
23:59:31.01 |
-20:16:40.4 |
HIP 118278 |
14.65 |
| 2026-06-10 12:00 |
23:59:31.28 |
-20:16:45.5 |
HIP 118278 |
14.74 |
| 2026-06-11 00:00 |
23:59:31.54 |
-20:16:50.7 |
HIP 118278 |
14.83 |
| 2026-06-11 12:00 |
23:59:31.79 |
-20:16:56.0 |
HIP 118278 |
14.92 |
| 2026-06-12 00:00 |
23:59:32.03 |
-20:17:01.3 |
HIP 118278 |
15.01 |
| 2026-06-12 12:00 |
23:59:32.26 |
-20:17:06.8 |
HIP 118278 |
15.10 |
| 2026-06-13 00:00 |
23:59:32.48 |
-20:17:12.2 |
HIP 118278 |
15.20 |
| 2026-06-13 12:00 |
23:59:32.69 |
-20:17:17.8 |
HIP 118278 |
15.29 |
| 2026-06-14 00:00 |
23:59:32.88 |
-20:17:23.4 |
HIP 118278 |
15.39 |
| 2026-06-14 12:00 |
23:59:33.07 |
-20:17:29.2 |
HIP 118278 |
15.49 |
| 2026-06-15 00:00 |
23:59:33.24 |
-20:17:34.9 |
HIP 118278 |
15.59 |
| 2026-06-15 12:00 |
23:59:33.41 |
-20:17:40.8 |
HIP 118278 |
15.69 |
| 2026-06-16 00:00 |
23:59:33.56 |
-20:17:46.7 |
HIP 118278 |
15.79 |
| 2026-06-16 12:00 |
23:59:33.70 |
-20:17:52.7 |
HIP 118278 |
15.89 |
| 2026-06-17 00:00 |
23:59:33.83 |
-20:17:58.7 |
HIP 118278 |
15.99 |
| 2026-06-17 12:00 |
23:59:33.95 |
-20:18:04.8 |
HIP 118278 |
16.10 |
| 2026-06-18 00:00 |
23:59:34.06 |
-20:18:11.0 |
HIP 118278 |
16.20 |
| 2026-06-18 12:00 |
23:59:34.16 |
-20:18:17.3 |
HIP 118278 |
16.31 |
| 2026-06-19 00:00 |
23:59:34.25 |
-20:18:23.6 |
HIP 118278 |
16.42 |
| 2026-06-19 12:00 |
23:59:34.33 |
-20:18:30.0 |
HIP 118278 |
16.52 |
| 2026-06-20 00:00 |
23:59:34.39 |
-20:18:36.4 |
HIP 118278 |
16.63 |
| 2026-06-20 12:00 |
23:59:34.45 |
-20:18:42.9 |
HIP 118278 |
16.74 |
| 2026-06-21 00:00 |
23:59:34.49 |
-20:18:49.5 |
HIP 118278 |
16.85 |
| 2026-06-21 12:00 |
23:59:34.53 |
-20:18:56.2 |
HIP 118181 |
16.94 |
| 2026-06-22 00:00 |
23:59:34.55 |
-20:19:02.9 |
HIP 118181 |
16.95 |