メタデータ
| 項目 |
値 |
| Designation |
C/1952 H1 (Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1952-06-08T17:20:59.570880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:10Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
37.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1952-07-02.0000000 |
| e |
0.98344799 |
| q (au) |
1.282807 |
| a (au) |
77.501590 |
| i (deg) |
112.034543 |
| Ω (om, deg) |
122.356189 |
| ω (w, deg) |
144.900038 |
| M (ma, deg) |
0.033625 |
等級
散乱 + 全体線形
$$
M_a = (7.294 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.294 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.734 |
| 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 |
08:43:06.14 |
-24:11:23.5 |
HIP 42736 |
7.63 |
| 2026-05-12 12:00 |
08:43:06.44 |
-24:11:10.1 |
HIP 42736 |
7.75 |
| 2026-05-13 00:00 |
08:43:06.76 |
-24:10:56.8 |
HIP 42736 |
7.86 |
| 2026-05-13 12:00 |
08:43:07.09 |
-24:10:43.5 |
HIP 42736 |
7.99 |
| 2026-05-14 00:00 |
08:43:07.44 |
-24:10:30.3 |
HIP 42736 |
8.12 |
| 2026-05-14 12:00 |
08:43:07.79 |
-24:10:17.2 |
HIP 42736 |
8.26 |
| 2026-05-15 00:00 |
08:43:08.16 |
-24:10:04.2 |
HIP 42736 |
8.41 |
| 2026-05-15 12:00 |
08:43:08.54 |
-24:09:51.2 |
HIP 42736 |
8.56 |
| 2026-05-16 00:00 |
08:43:08.93 |
-24:09:38.3 |
HIP 42736 |
8.72 |
| 2026-05-16 12:00 |
08:43:09.33 |
-24:09:25.4 |
HIP 42736 |
8.88 |
| 2026-05-17 00:00 |
08:43:09.75 |
-24:09:12.6 |
HIP 42736 |
9.05 |
| 2026-05-17 12:00 |
08:43:10.18 |
-24:09:00.0 |
HIP 42736 |
9.22 |
| 2026-05-18 00:00 |
08:43:10.62 |
-24:08:47.3 |
HIP 42736 |
9.40 |
| 2026-05-18 12:00 |
08:43:11.07 |
-24:08:34.7 |
HIP 42736 |
9.58 |
| 2026-05-19 00:00 |
08:43:11.53 |
-24:08:22.2 |
HIP 42736 |
9.77 |
| 2026-05-19 12:00 |
08:43:12.01 |
-24:08:09.8 |
HIP 42736 |
9.96 |
| 2026-05-20 00:00 |
08:43:12.49 |
-24:07:57.5 |
HIP 42736 |
10.15 |
| 2026-05-20 12:00 |
08:43:12.99 |
-24:07:45.2 |
HIP 42736 |
10.35 |
| 2026-05-21 00:00 |
08:43:13.50 |
-24:07:33.0 |
HIP 42736 |
10.55 |
| 2026-05-21 12:00 |
08:43:14.03 |
-24:07:20.9 |
HIP 42736 |
10.75 |
| 2026-05-22 00:00 |
08:43:14.56 |
-24:07:08.9 |
HIP 42736 |
10.96 |
| 2026-05-22 12:00 |
08:43:15.10 |
-24:06:56.9 |
HIP 42736 |
11.17 |
| 2026-05-23 00:00 |
08:43:15.66 |
-24:06:45.1 |
HIP 42736 |
11.38 |
| 2026-05-23 12:00 |
08:43:16.23 |
-24:06:33.3 |
HIP 42736 |
11.59 |
| 2026-05-24 00:00 |
08:43:16.81 |
-24:06:21.6 |
HIP 42736 |
11.81 |
| 2026-05-24 12:00 |
08:43:17.40 |
-24:06:09.9 |
HIP 42736 |
12.03 |
| 2026-05-25 00:00 |
08:43:18.00 |
-24:05:58.4 |
HIP 42736 |
12.25 |
| 2026-05-25 12:00 |
08:43:18.61 |
-24:05:46.9 |
HIP 42736 |
12.47 |
| 2026-05-26 00:00 |
08:43:19.24 |
-24:05:35.6 |
HIP 42736 |
12.69 |
| 2026-05-26 12:00 |
08:43:19.87 |
-24:05:24.3 |
HIP 42736 |
12.92 |
| 2026-05-27 00:00 |
08:43:20.52 |
-24:05:13.1 |
HIP 42736 |
13.15 |
| 2026-05-27 12:00 |
08:43:21.17 |
-24:05:02.0 |
HIP 42736 |
13.38 |
| 2026-05-28 00:00 |
08:43:21.84 |
-24:04:50.9 |
HIP 42736 |
13.61 |
| 2026-05-28 12:00 |
08:43:22.52 |
-24:04:40.0 |
HIP 42736 |
13.84 |
| 2026-05-29 00:00 |
08:43:23.21 |
-24:04:29.1 |
HIP 42736 |
14.07 |
| 2026-05-29 12:00 |
08:43:23.91 |
-24:04:18.4 |
HIP 42736 |
14.31 |
| 2026-05-30 00:00 |
08:43:24.62 |
-24:04:07.7 |
HIP 42736 |
14.54 |
| 2026-05-30 12:00 |
08:43:25.34 |
-24:03:57.1 |
HIP 42736 |
14.78 |
| 2026-05-31 00:00 |
08:43:26.07 |
-24:03:46.6 |
HIP 42736 |
15.02 |
| 2026-05-31 12:00 |
08:43:26.81 |
-24:03:36.2 |
HIP 42736 |
15.26 |
| 2026-06-01 00:00 |
08:43:27.57 |
-24:03:25.9 |
HIP 42736 |
15.50 |
| 2026-06-01 12:00 |
08:43:28.33 |
-24:03:15.7 |
HIP 42736 |
15.74 |
| 2026-06-02 00:00 |
08:43:29.10 |
-24:03:05.5 |
HIP 42736 |
15.98 |