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
$$
M_a = (7.291 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.291 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.552 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
08:45:46.54 |
-23:55:51.4 |
HIP 42912 |
17.17 |
| 2026-07-29 12:00 |
08:45:47.98 |
-23:55:54.4 |
HIP 42912 |
17.48 |
| 2026-07-30 00:00 |
08:45:49.43 |
-23:55:57.5 |
HIP 42912 |
17.79 |
| 2026-07-30 12:00 |
08:45:50.88 |
-23:56:00.7 |
HIP 42912 |
18.11 |
| 2026-07-31 00:00 |
08:45:52.33 |
-23:56:04.0 |
HIP 42912 |
18.42 |
| 2026-07-31 12:00 |
08:45:53.77 |
-23:56:07.4 |
HIP 42912 |
18.74 |
| 2026-08-01 00:00 |
08:45:55.22 |
-23:56:11.0 |
HIP 42912 |
19.06 |
| 2026-08-01 12:00 |
08:45:56.67 |
-23:56:14.7 |
HIP 42912 |
19.39 |
| 2026-08-02 00:00 |
08:45:58.12 |
-23:56:18.4 |
HIP 42912 |
19.71 |
| 2026-08-02 12:00 |
08:45:59.57 |
-23:56:22.3 |
HIP 42912 |
20.03 |
| 2026-08-03 00:00 |
08:46:01.02 |
-23:56:26.4 |
HIP 42912 |
20.36 |
| 2026-08-03 12:00 |
08:46:02.46 |
-23:56:30.5 |
HIP 42912 |
20.69 |
| 2026-08-04 00:00 |
08:46:03.91 |
-23:56:34.8 |
HIP 42912 |
21.01 |
| 2026-08-04 12:00 |
08:46:05.36 |
-23:56:39.1 |
HIP 42912 |
21.34 |
| 2026-08-05 00:00 |
08:46:06.81 |
-23:56:43.6 |
HIP 42912 |
21.67 |
| 2026-08-05 12:00 |
08:46:08.25 |
-23:56:48.2 |
HIP 42912 |
22.00 |
| 2026-08-06 00:00 |
08:46:09.70 |
-23:56:52.9 |
HIP 42912 |
22.34 |
| 2026-08-06 12:00 |
08:46:11.14 |
-23:56:57.7 |
HIP 42912 |
22.67 |
| 2026-08-07 00:00 |
08:46:12.58 |
-23:57:02.6 |
HIP 42912 |
23.00 |
| 2026-08-07 12:00 |
08:46:14.03 |
-23:57:07.7 |
HIP 42912 |
23.34 |
| 2026-08-08 00:00 |
08:46:15.47 |
-23:57:12.8 |
HIP 42912 |
23.67 |
| 2026-08-08 12:00 |
08:46:16.91 |
-23:57:18.1 |
HIP 42912 |
24.01 |
| 2026-08-09 00:00 |
08:46:18.35 |
-23:57:23.5 |
HIP 42912 |
24.34 |
| 2026-08-09 12:00 |
08:46:19.78 |
-23:57:29.0 |
HIP 42912 |
24.68 |
| 2026-08-10 00:00 |
08:46:21.22 |
-23:57:34.6 |
HIP 42912 |
25.02 |
| 2026-08-10 12:00 |
08:46:22.65 |
-23:57:40.3 |
HIP 42912 |
25.36 |
| 2026-08-11 00:00 |
08:46:24.09 |
-23:57:46.1 |
HIP 42912 |
25.69 |
| 2026-08-11 12:00 |
08:46:25.52 |
-23:57:52.1 |
HIP 42912 |
26.03 |
| 2026-08-12 00:00 |
08:46:26.95 |
-23:57:58.1 |
HIP 42912 |
26.37 |
| 2026-08-12 12:00 |
08:46:28.37 |
-23:58:04.3 |
HIP 42912 |
26.71 |
| 2026-08-13 00:00 |
08:46:29.80 |
-23:58:10.5 |
HIP 42912 |
27.05 |
| 2026-08-13 12:00 |
08:46:31.22 |
-23:58:16.9 |
HIP 42912 |
27.39 |
| 2026-08-14 00:00 |
08:46:32.64 |
-23:58:23.4 |
HIP 42912 |
27.73 |
| 2026-08-14 12:00 |
08:46:34.05 |
-23:58:30.0 |
HIP 42912 |
28.07 |
| 2026-08-15 00:00 |
08:46:35.47 |
-23:58:36.7 |
HIP 42912 |
28.41 |
| 2026-08-15 12:00 |
08:46:36.88 |
-23:58:43.5 |
HIP 43173 |
28.55 |
| 2026-08-16 00:00 |
08:46:38.29 |
-23:58:50.4 |
HIP 43173 |
28.30 |
| 2026-08-16 12:00 |
08:46:39.69 |
-23:58:57.4 |
HIP 43173 |
28.04 |
| 2026-08-17 00:00 |
08:46:41.10 |
-23:59:04.5 |
HIP 43173 |
27.78 |
| 2026-08-17 12:00 |
08:46:42.49 |
-23:59:11.8 |
HIP 43173 |
27.53 |
| 2026-08-18 00:00 |
08:46:43.89 |
-23:59:19.1 |
HIP 43173 |
27.28 |
| 2026-08-18 12:00 |
08:46:45.28 |
-23:59:26.5 |
HIP 43173 |
27.02 |
| 2026-08-19 00:00 |
08:46:46.67 |
-23:59:34.1 |
HIP 43173 |
26.77 |