C/1948 E1 (Pajdusakova-Mrkos)
メタデータ
| 項目 |
値 |
| Designation |
C/1948 E1 (Pajdusakova-Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-05-16T15:18:31.078080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
12.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1949-03-06.0000000 |
| e |
1.00093013 |
| q (au) |
2.107136 |
| a (au) |
-2265.428601 |
| i (deg) |
92.917661 |
| Ω (om, deg) |
247.655064 |
| ω (w, deg) |
66.906940 |
| M (ma, deg) |
0.002682 |
等級
散乱 + 全体線形
$$
M_a = (2.842 + 5.735\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.842 |
| n |
5.735 |
| gf |
0.996 |
| gb |
-0.682 |
| k |
0.981 |
| δ90 |
9.995 |
| 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) |
| 2026-02-03 00:00 |
04:43:49.79 |
-28:33:13.3 |
HIP 21985 |
7.49 |
| 2026-02-03 12:00 |
04:43:49.14 |
-28:33:02.2 |
HIP 21985 |
7.59 |
| 2026-02-04 00:00 |
04:43:48.50 |
-28:32:51.0 |
HIP 21985 |
7.70 |
| 2026-02-04 12:00 |
04:43:47.88 |
-28:32:39.7 |
HIP 21985 |
7.81 |
| 2026-02-05 00:00 |
04:43:47.26 |
-28:32:28.3 |
HIP 21985 |
7.94 |
| 2026-02-05 12:00 |
04:43:46.65 |
-28:32:16.9 |
HIP 21985 |
8.07 |
| 2026-02-06 00:00 |
04:43:46.06 |
-28:32:05.5 |
HIP 21985 |
8.21 |
| 2026-02-06 12:00 |
04:43:45.47 |
-28:31:53.9 |
HIP 21985 |
8.35 |
| 2026-02-07 00:00 |
04:43:44.90 |
-28:31:42.4 |
HIP 21985 |
8.50 |
| 2026-02-07 12:00 |
04:43:44.34 |
-28:31:30.7 |
HIP 21985 |
8.65 |
| 2026-02-08 00:00 |
04:43:43.79 |
-28:31:19.0 |
HIP 21985 |
8.81 |
| 2026-02-08 12:00 |
04:43:43.25 |
-28:31:07.2 |
HIP 21985 |
8.97 |
| 2026-02-09 00:00 |
04:43:42.72 |
-28:30:55.4 |
HIP 21985 |
9.14 |
| 2026-02-09 12:00 |
04:43:42.20 |
-28:30:43.5 |
HIP 21985 |
9.31 |
| 2026-02-10 00:00 |
04:43:41.69 |
-28:30:31.6 |
HIP 21985 |
9.48 |
| 2026-02-10 12:00 |
04:43:41.19 |
-28:30:19.5 |
HIP 21985 |
9.66 |
| 2026-02-11 00:00 |
04:43:40.70 |
-28:30:07.5 |
HIP 21985 |
9.84 |
| 2026-02-11 12:00 |
04:43:40.23 |
-28:29:55.4 |
HIP 21985 |
10.03 |
| 2026-02-12 00:00 |
04:43:39.77 |
-28:29:43.2 |
HIP 21985 |
10.22 |
| 2026-02-12 12:00 |
04:43:39.31 |
-28:29:31.0 |
HIP 21985 |
10.41 |
| 2026-02-13 00:00 |
04:43:38.87 |
-28:29:18.7 |
HIP 21985 |
10.60 |
| 2026-02-13 12:00 |
04:43:38.44 |
-28:29:06.4 |
HIP 21985 |
10.80 |
| 2026-02-14 00:00 |
04:43:38.02 |
-28:28:54.1 |
HIP 21985 |
10.99 |
| 2026-02-14 12:00 |
04:43:37.61 |
-28:28:41.7 |
HIP 21985 |
11.19 |
| 2026-02-15 00:00 |
04:43:37.22 |
-28:28:29.2 |
HIP 21985 |
11.39 |
| 2026-02-15 12:00 |
04:43:36.83 |
-28:28:16.7 |
HIP 21985 |
11.60 |
| 2026-02-16 00:00 |
04:43:36.46 |
-28:28:04.2 |
HIP 21985 |
11.80 |
| 2026-02-16 12:00 |
04:43:36.10 |
-28:27:51.6 |
HIP 21985 |
12.01 |
| 2026-02-17 00:00 |
04:43:35.75 |
-28:27:38.9 |
HIP 21985 |
12.22 |
| 2026-02-17 12:00 |
04:43:35.41 |
-28:27:26.3 |
HIP 21985 |
12.43 |
| 2026-02-18 00:00 |
04:43:35.08 |
-28:27:13.6 |
HIP 21985 |
12.64 |
| 2026-02-18 12:00 |
04:43:34.76 |
-28:27:00.8 |
HIP 21985 |
12.85 |
| 2026-02-19 00:00 |
04:43:34.46 |
-28:26:48.0 |
HIP 21985 |
13.06 |
| 2026-02-19 12:00 |
04:43:34.17 |
-28:26:35.2 |
HIP 21985 |
13.27 |
| 2026-02-20 00:00 |
04:43:33.88 |
-28:26:22.3 |
HIP 21985 |
13.49 |
| 2026-02-20 12:00 |
04:43:33.61 |
-28:26:09.4 |
HIP 21985 |
13.70 |
| 2026-02-21 00:00 |
04:43:33.36 |
-28:25:56.5 |
HIP 21985 |
13.92 |
| 2026-02-21 12:00 |
04:43:33.11 |
-28:25:43.5 |
HIP 21985 |
14.14 |
| 2026-02-22 00:00 |
04:43:32.87 |
-28:25:30.5 |
HIP 22031 |
14.25 |
| 2026-02-22 12:00 |
04:43:32.65 |
-28:25:17.5 |
HIP 22031 |
14.10 |
| 2026-02-23 00:00 |
04:43:32.44 |
-28:25:04.5 |
HIP 22031 |
13.95 |
| 2026-02-23 12:00 |
04:43:32.24 |
-28:24:51.4 |
HIP 22031 |
13.81 |
| 2026-02-24 00:00 |
04:43:32.05 |
-28:24:38.3 |
HIP 22031 |
13.66 |