メタデータ
| 項目 |
値 |
| Designation |
C/1947 Y1 (Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-02-16T15:01:24.922560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
4 |
| 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) |
1948-10-12.0000000 |
| e |
1.00041232 |
| q (au) |
1.499710 |
| a (au) |
-3637.212894 |
| i (deg) |
77.512349 |
| Ω (om, deg) |
199.310414 |
| ω (w, deg) |
61.913458 |
| M (ma, deg) |
0.001071 |
等級
散乱 + 全体線形
$$
M_a = (6.993 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.993 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.777 |
| k |
0.965 |
| 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 |
03:10:46.44 |
-30:43:06.6 |
HIP 14806 |
14.14 |
| 2026-06-01 12:00 |
03:10:47.66 |
-30:43:08.4 |
HIP 14806 |
14.07 |
| 2026-06-02 00:00 |
03:10:48.89 |
-30:43:10.2 |
HIP 14806 |
14.00 |
| 2026-06-02 12:00 |
03:10:50.11 |
-30:43:12.1 |
HIP 14806 |
13.94 |
| 2026-06-03 00:00 |
03:10:51.32 |
-30:43:14.2 |
HIP 14806 |
13.89 |
| 2026-06-03 12:00 |
03:10:52.53 |
-30:43:16.4 |
HIP 14806 |
13.84 |
| 2026-06-04 00:00 |
03:10:53.74 |
-30:43:18.7 |
HIP 14806 |
13.80 |
| 2026-06-04 12:00 |
03:10:54.94 |
-30:43:21.0 |
HIP 14806 |
13.77 |
| 2026-06-05 00:00 |
03:10:56.14 |
-30:43:23.6 |
HIP 14806 |
13.74 |
| 2026-06-05 12:00 |
03:10:57.34 |
-30:43:26.2 |
HIP 14806 |
13.72 |
| 2026-06-06 00:00 |
03:10:58.53 |
-30:43:28.9 |
HIP 14806 |
13.71 |
| 2026-06-06 12:00 |
03:10:59.71 |
-30:43:31.7 |
HIP 14806 |
13.70 |
| 2026-06-07 00:00 |
03:11:00.90 |
-30:43:34.7 |
HIP 14806 |
13.71 |
| 2026-06-07 12:00 |
03:11:02.07 |
-30:43:37.7 |
HIP 14806 |
13.71 |
| 2026-06-08 00:00 |
03:11:03.25 |
-30:43:40.9 |
HIP 14806 |
13.73 |
| 2026-06-08 12:00 |
03:11:04.41 |
-30:43:44.1 |
HIP 14806 |
13.75 |
| 2026-06-09 00:00 |
03:11:05.58 |
-30:43:47.5 |
HIP 14806 |
13.78 |
| 2026-06-09 12:00 |
03:11:06.73 |
-30:43:51.0 |
HIP 14806 |
13.81 |
| 2026-06-10 00:00 |
03:11:07.89 |
-30:43:54.6 |
HIP 14806 |
13.86 |
| 2026-06-10 12:00 |
03:11:09.03 |
-30:43:58.3 |
HIP 14806 |
13.90 |
| 2026-06-11 00:00 |
03:11:10.18 |
-30:44:02.1 |
HIP 14806 |
13.96 |
| 2026-06-11 12:00 |
03:11:11.31 |
-30:44:06.0 |
HIP 14806 |
14.02 |
| 2026-06-12 00:00 |
03:11:12.45 |
-30:44:10.0 |
HIP 14806 |
14.09 |
| 2026-06-12 12:00 |
03:11:13.57 |
-30:44:14.2 |
HIP 14806 |
14.16 |
| 2026-06-13 00:00 |
03:11:14.69 |
-30:44:18.4 |
HIP 14806 |
14.24 |
| 2026-06-13 12:00 |
03:11:15.81 |
-30:44:22.8 |
HIP 14806 |
14.32 |
| 2026-06-14 00:00 |
03:11:16.92 |
-30:44:27.2 |
HIP 14806 |
14.41 |
| 2026-06-14 12:00 |
03:11:18.02 |
-30:44:31.8 |
HIP 14806 |
14.51 |
| 2026-06-15 00:00 |
03:11:19.12 |
-30:44:36.4 |
HIP 14806 |
14.61 |
| 2026-06-15 12:00 |
03:11:20.21 |
-30:44:41.2 |
HIP 14806 |
14.71 |
| 2026-06-16 00:00 |
03:11:21.30 |
-30:44:46.1 |
HIP 14806 |
14.82 |
| 2026-06-16 12:00 |
03:11:22.38 |
-30:44:51.1 |
HIP 14806 |
14.94 |
| 2026-06-17 00:00 |
03:11:23.45 |
-30:44:56.2 |
HIP 14806 |
15.06 |
| 2026-06-17 12:00 |
03:11:24.52 |
-30:45:01.4 |
HIP 14806 |
15.18 |
| 2026-06-18 00:00 |
03:11:25.58 |
-30:45:06.7 |
HIP 14806 |
15.31 |
| 2026-06-18 12:00 |
03:11:26.64 |
-30:45:12.1 |
HIP 14806 |
15.44 |
| 2026-06-19 00:00 |
03:11:27.69 |
-30:45:17.6 |
HIP 14806 |
15.58 |
| 2026-06-19 12:00 |
03:11:28.73 |
-30:45:23.2 |
HIP 14806 |
15.72 |
| 2026-06-20 00:00 |
03:11:29.76 |
-30:45:28.9 |
HIP 14806 |
15.87 |
| 2026-06-20 12:00 |
03:11:30.79 |
-30:45:34.7 |
HIP 14806 |
16.02 |
| 2026-06-21 00:00 |
03:11:31.81 |
-30:45:40.6 |
HIP 14806 |
16.17 |
| 2026-06-21 12:00 |
03:11:32.83 |
-30:45:46.6 |
HIP 14806 |
16.32 |
| 2026-06-22 00:00 |
03:11:33.84 |
-30:45:52.8 |
HIP 14806 |
16.48 |