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) |
| 2026-05-12 00:00 |
03:09:55.23 |
-30:43:28.8 |
HIP 14806 |
21.27 |
| 2026-05-12 12:00 |
03:09:56.54 |
-30:43:26.1 |
HIP 14806 |
21.02 |
| 2026-05-13 00:00 |
03:09:57.85 |
-30:43:23.5 |
HIP 14806 |
20.77 |
| 2026-05-13 12:00 |
03:09:59.16 |
-30:43:21.0 |
HIP 14806 |
20.53 |
| 2026-05-14 00:00 |
03:10:00.46 |
-30:43:18.6 |
HIP 14806 |
20.29 |
| 2026-05-14 12:00 |
03:10:01.77 |
-30:43:16.3 |
HIP 14806 |
20.05 |
| 2026-05-15 00:00 |
03:10:03.08 |
-30:43:14.1 |
HIP 14806 |
19.82 |
| 2026-05-15 12:00 |
03:10:04.38 |
-30:43:12.0 |
HIP 14806 |
19.59 |
| 2026-05-16 00:00 |
03:10:05.68 |
-30:43:10.1 |
HIP 14806 |
19.36 |
| 2026-05-16 12:00 |
03:10:06.99 |
-30:43:08.2 |
HIP 14806 |
19.13 |
| 2026-05-17 00:00 |
03:10:08.29 |
-30:43:06.5 |
HIP 14806 |
18.91 |
| 2026-05-17 12:00 |
03:10:09.59 |
-30:43:04.9 |
HIP 14806 |
18.69 |
| 2026-05-18 00:00 |
03:10:10.89 |
-30:43:03.4 |
HIP 14806 |
18.47 |
| 2026-05-18 12:00 |
03:10:12.19 |
-30:43:02.0 |
HIP 14806 |
18.26 |
| 2026-05-19 00:00 |
03:10:13.49 |
-30:43:00.7 |
HIP 14806 |
18.04 |
| 2026-05-19 12:00 |
03:10:14.78 |
-30:42:59.5 |
HIP 14806 |
17.84 |
| 2026-05-20 00:00 |
03:10:16.08 |
-30:42:58.5 |
HIP 14806 |
17.63 |
| 2026-05-20 12:00 |
03:10:17.37 |
-30:42:57.5 |
HIP 14806 |
17.43 |
| 2026-05-21 00:00 |
03:10:18.66 |
-30:42:56.7 |
HIP 14806 |
17.24 |
| 2026-05-21 12:00 |
03:10:19.95 |
-30:42:56.0 |
HIP 14806 |
17.04 |
| 2026-05-22 00:00 |
03:10:21.24 |
-30:42:55.3 |
HIP 14806 |
16.86 |
| 2026-05-22 12:00 |
03:10:22.52 |
-30:42:54.8 |
HIP 14806 |
16.67 |
| 2026-05-23 00:00 |
03:10:23.80 |
-30:42:54.5 |
HIP 14806 |
16.49 |
| 2026-05-23 12:00 |
03:10:25.08 |
-30:42:54.2 |
HIP 14806 |
16.32 |
| 2026-05-24 00:00 |
03:10:26.36 |
-30:42:54.0 |
HIP 14806 |
16.15 |
| 2026-05-24 12:00 |
03:10:27.64 |
-30:42:54.0 |
HIP 14806 |
15.98 |
| 2026-05-25 00:00 |
03:10:28.91 |
-30:42:54.0 |
HIP 14806 |
15.82 |
| 2026-05-25 12:00 |
03:10:30.18 |
-30:42:54.2 |
HIP 14806 |
15.66 |
| 2026-05-26 00:00 |
03:10:31.45 |
-30:42:54.5 |
HIP 14806 |
15.51 |
| 2026-05-26 12:00 |
03:10:32.72 |
-30:42:54.9 |
HIP 14806 |
15.37 |
| 2026-05-27 00:00 |
03:10:33.98 |
-30:42:55.4 |
HIP 14806 |
15.22 |
| 2026-05-27 12:00 |
03:10:35.24 |
-30:42:56.0 |
HIP 14806 |
15.09 |
| 2026-05-28 00:00 |
03:10:36.50 |
-30:42:56.8 |
HIP 14806 |
14.96 |
| 2026-05-28 12:00 |
03:10:37.75 |
-30:42:57.6 |
HIP 14806 |
14.84 |
| 2026-05-29 00:00 |
03:10:39.00 |
-30:42:58.6 |
HIP 14806 |
14.72 |
| 2026-05-29 12:00 |
03:10:40.25 |
-30:42:59.6 |
HIP 14806 |
14.61 |
| 2026-05-30 00:00 |
03:10:41.49 |
-30:43:00.8 |
HIP 14806 |
14.50 |
| 2026-05-30 12:00 |
03:10:42.73 |
-30:43:02.1 |
HIP 14806 |
14.40 |
| 2026-05-31 00:00 |
03:10:43.97 |
-30:43:03.5 |
HIP 14806 |
14.31 |
| 2026-05-31 12:00 |
03:10:45.21 |
-30:43:05.0 |
HIP 14806 |
14.22 |
| 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 |