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) |
| 2026-03-26 00:00 |
03:08:03.76 |
-30:55:07.5 |
HIP 14671 |
27.84 |
| 2026-03-26 12:00 |
03:08:04.70 |
-30:54:56.2 |
HIP 14671 |
27.83 |
| 2026-03-27 00:00 |
03:08:05.65 |
-30:54:44.9 |
HIP 14671 |
27.83 |
| 2026-03-27 12:00 |
03:08:06.61 |
-30:54:33.7 |
HIP 14671 |
27.83 |
| 2026-03-28 00:00 |
03:08:07.57 |
-30:54:22.6 |
HIP 14671 |
27.83 |
| 2026-03-28 12:00 |
03:08:08.54 |
-30:54:11.6 |
HIP 14671 |
27.83 |
| 2026-03-29 00:00 |
03:08:09.52 |
-30:54:00.6 |
HIP 14671 |
27.84 |
| 2026-03-29 12:00 |
03:08:10.51 |
-30:53:49.7 |
HIP 14671 |
27.84 |
| 2026-03-30 00:00 |
03:08:11.50 |
-30:53:38.9 |
HIP 14671 |
27.84 |
| 2026-03-30 12:00 |
03:08:12.51 |
-30:53:28.1 |
HIP 14671 |
27.85 |
| 2026-03-31 00:00 |
03:08:13.51 |
-30:53:17.4 |
HIP 14671 |
27.85 |
| 2026-03-31 12:00 |
03:08:14.53 |
-30:53:06.8 |
HIP 14671 |
27.86 |
| 2026-04-01 00:00 |
03:08:15.55 |
-30:52:56.2 |
HIP 14671 |
27.87 |
| 2026-04-01 12:00 |
03:08:16.58 |
-30:52:45.7 |
HIP 14671 |
27.88 |
| 2026-04-02 00:00 |
03:08:17.62 |
-30:52:35.3 |
HIP 14671 |
27.89 |
| 2026-04-02 12:00 |
03:08:18.66 |
-30:52:25.0 |
HIP 14671 |
27.90 |
| 2026-04-03 00:00 |
03:08:19.71 |
-30:52:14.7 |
HIP 14671 |
27.91 |
| 2026-04-03 12:00 |
03:08:20.77 |
-30:52:04.5 |
HIP 14671 |
27.92 |
| 2026-04-04 00:00 |
03:08:21.83 |
-30:51:54.4 |
HIP 14671 |
27.94 |
| 2026-04-04 12:00 |
03:08:22.90 |
-30:51:44.3 |
HIP 14671 |
27.95 |
| 2026-04-05 00:00 |
03:08:23.97 |
-30:51:34.3 |
HIP 14671 |
27.97 |
| 2026-04-05 12:00 |
03:08:25.05 |
-30:51:24.4 |
HIP 14671 |
27.98 |
| 2026-04-06 00:00 |
03:08:26.14 |
-30:51:14.6 |
HIP 14671 |
28.00 |
| 2026-04-06 12:00 |
03:08:27.23 |
-30:51:04.9 |
HIP 14671 |
28.02 |
| 2026-04-07 00:00 |
03:08:28.33 |
-30:50:55.2 |
HIP 14671 |
28.04 |
| 2026-04-07 12:00 |
03:08:29.44 |
-30:50:45.6 |
HIP 14671 |
28.06 |
| 2026-04-08 00:00 |
03:08:30.55 |
-30:50:36.1 |
HIP 14671 |
28.09 |
| 2026-04-08 12:00 |
03:08:31.67 |
-30:50:26.7 |
HIP 14671 |
28.11 |
| 2026-04-09 00:00 |
03:08:32.79 |
-30:50:17.4 |
HIP 14671 |
28.13 |
| 2026-04-09 12:00 |
03:08:33.92 |
-30:50:08.1 |
HIP 14671 |
28.16 |
| 2026-04-10 00:00 |
03:08:35.06 |
-30:49:58.9 |
HIP 14671 |
28.19 |
| 2026-04-10 12:00 |
03:08:36.20 |
-30:49:49.8 |
HIP 14671 |
28.22 |
| 2026-04-11 00:00 |
03:08:37.34 |
-30:49:40.8 |
HIP 14671 |
28.24 |
| 2026-04-11 12:00 |
03:08:38.49 |
-30:49:31.9 |
HIP 14671 |
28.27 |
| 2026-04-12 00:00 |
03:08:39.65 |
-30:49:23.1 |
HIP 14671 |
28.31 |
| 2026-04-12 12:00 |
03:08:40.81 |
-30:49:14.3 |
HIP 14671 |
28.34 |
| 2026-04-13 00:00 |
03:08:41.97 |
-30:49:05.7 |
HIP 14671 |
28.37 |
| 2026-04-13 12:00 |
03:08:43.15 |
-30:48:57.1 |
HIP 14671 |
28.41 |
| 2026-04-14 00:00 |
03:08:44.32 |
-30:48:48.6 |
HIP 14671 |
28.44 |
| 2026-04-14 12:00 |
03:08:45.50 |
-30:48:40.2 |
HIP 14671 |
28.48 |
| 2026-04-15 00:00 |
03:08:46.69 |
-30:48:31.9 |
HIP 14671 |
28.52 |
| 2026-04-15 12:00 |
03:08:47.88 |
-30:48:23.7 |
HIP 14671 |
28.56 |
| 2026-04-16 00:00 |
03:08:49.07 |
-30:48:15.5 |
HIP 14671 |
28.60 |