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
$$
M_a = (12.553 + 3.942\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.553 |
| n |
3.942 |
| gf |
0.995 |
| 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) |
| 2026-03-26 00:00 |
23:57:11.65 |
-20:19:15.3 |
HIP 118181 |
16.56 |
| 2026-03-26 12:00 |
23:57:12.97 |
-20:19:08.4 |
HIP 118181 |
16.25 |
| 2026-03-27 00:00 |
23:57:14.28 |
-20:19:01.6 |
HIP 118181 |
15.94 |
| 2026-03-27 12:00 |
23:57:15.58 |
-20:18:54.8 |
HIP 118181 |
15.64 |
| 2026-03-28 00:00 |
23:57:16.89 |
-20:18:48.2 |
HIP 118181 |
15.33 |
| 2026-03-28 12:00 |
23:57:18.20 |
-20:18:41.5 |
HIP 118181 |
15.03 |
| 2026-03-29 00:00 |
23:57:19.50 |
-20:18:35.0 |
HIP 118181 |
14.73 |
| 2026-03-29 12:00 |
23:57:20.81 |
-20:18:28.5 |
HIP 118181 |
14.43 |
| 2026-03-30 00:00 |
23:57:22.11 |
-20:18:22.1 |
HIP 118181 |
14.13 |
| 2026-03-30 12:00 |
23:57:23.41 |
-20:18:15.8 |
HIP 118181 |
13.83 |
| 2026-03-31 00:00 |
23:57:24.70 |
-20:18:09.5 |
HIP 118181 |
13.53 |
| 2026-03-31 12:00 |
23:57:26.00 |
-20:18:03.3 |
HIP 118181 |
13.24 |
| 2026-04-01 00:00 |
23:57:27.29 |
-20:17:57.1 |
HIP 118181 |
12.94 |
| 2026-04-01 12:00 |
23:57:28.58 |
-20:17:51.0 |
HIP 118181 |
12.65 |
| 2026-04-02 00:00 |
23:57:29.87 |
-20:17:45.0 |
HIP 118181 |
12.36 |
| 2026-04-02 12:00 |
23:57:31.15 |
-20:17:39.1 |
HIP 118181 |
12.07 |
| 2026-04-03 00:00 |
23:57:32.44 |
-20:17:33.2 |
HIP 118181 |
11.79 |
| 2026-04-03 12:00 |
23:57:33.72 |
-20:17:27.4 |
HIP 118181 |
11.50 |
| 2026-04-04 00:00 |
23:57:35.00 |
-20:17:21.7 |
HIP 118181 |
11.22 |
| 2026-04-04 12:00 |
23:57:36.27 |
-20:17:16.1 |
HIP 118181 |
10.94 |
| 2026-04-05 00:00 |
23:57:37.54 |
-20:17:10.5 |
HIP 118181 |
10.67 |
| 2026-04-05 12:00 |
23:57:38.81 |
-20:17:05.0 |
HIP 118181 |
10.39 |
| 2026-04-06 00:00 |
23:57:40.08 |
-20:16:59.5 |
HIP 118181 |
10.12 |
| 2026-04-06 12:00 |
23:57:41.34 |
-20:16:54.2 |
HIP 118181 |
9.85 |
| 2026-04-07 00:00 |
23:57:42.61 |
-20:16:48.9 |
HIP 118181 |
9.58 |
| 2026-04-07 12:00 |
23:57:43.86 |
-20:16:43.7 |
HIP 118181 |
9.32 |
| 2026-04-08 00:00 |
23:57:45.12 |
-20:16:38.5 |
HIP 118181 |
9.06 |
| 2026-04-08 12:00 |
23:57:46.37 |
-20:16:33.4 |
HIP 118181 |
8.80 |
| 2026-04-09 00:00 |
23:57:47.61 |
-20:16:28.4 |
HIP 118181 |
8.55 |
| 2026-04-09 12:00 |
23:57:48.86 |
-20:16:23.5 |
HIP 118181 |
8.30 |
| 2026-04-10 00:00 |
23:57:50.10 |
-20:16:18.7 |
HIP 118181 |
8.05 |
| 2026-04-10 12:00 |
23:57:51.33 |
-20:16:13.9 |
HIP 118181 |
7.81 |
| 2026-04-11 00:00 |
23:57:52.57 |
-20:16:09.2 |
HIP 118181 |
7.57 |
| 2026-04-11 12:00 |
23:57:53.79 |
-20:16:04.6 |
HIP 118181 |
7.34 |
| 2026-04-12 00:00 |
23:57:55.02 |
-20:16:00.0 |
HIP 118181 |
7.11 |
| 2026-04-12 12:00 |
23:57:56.24 |
-20:15:55.6 |
HIP 118181 |
6.89 |
| 2026-04-13 00:00 |
23:57:57.45 |
-20:15:51.2 |
HIP 118181 |
6.67 |
| 2026-04-13 12:00 |
23:57:58.67 |
-20:15:46.9 |
HIP 118181 |
6.46 |
| 2026-04-14 00:00 |
23:57:59.87 |
-20:15:42.6 |
HIP 118181 |
6.26 |
| 2026-04-14 12:00 |
23:58:01.08 |
-20:15:38.5 |
HIP 118181 |
6.07 |
| 2026-04-15 00:00 |
23:58:02.28 |
-20:15:34.4 |
HIP 118181 |
5.88 |
| 2026-04-15 12:00 |
23:58:03.47 |
-20:15:30.4 |
HIP 118181 |
5.70 |
| 2026-04-16 00:00 |
23:58:04.66 |
-20:15:26.5 |
HIP 118181 |
5.53 |