メタデータ
| 項目 |
値 |
| Designation |
C/1953 X1 (Pajdusakova) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-01-24T16:06:48.960000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
22 |
| 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) |
1954-01-24.6714000 |
| e |
1.00000000 |
| q (au) |
0.072347 |
| a (au) |
- |
| i (deg) |
13.572900 |
| Ω (om, deg) |
115.232800 |
| ω (w, deg) |
94.077900 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-09-20 00:00 |
01:58:11.72 |
-02:31:35.8 |
HIP 9155 |
25.93 |
| 2026-09-20 12:00 |
01:58:10.78 |
-02:31:43.4 |
HIP 9155 |
26.02 |
| 2026-09-21 00:00 |
01:58:09.83 |
-02:31:51.0 |
HIP 9155 |
26.11 |
| 2026-09-21 12:00 |
01:58:08.87 |
-02:31:58.6 |
HIP 9155 |
26.21 |
| 2026-09-22 00:00 |
01:58:07.91 |
-02:32:06.2 |
HIP 9155 |
26.31 |
| 2026-09-22 12:00 |
01:58:06.94 |
-02:32:13.8 |
HIP 9155 |
26.41 |
| 2026-09-23 00:00 |
01:58:05.97 |
-02:32:21.4 |
HIP 9155 |
26.51 |
| 2026-09-23 12:00 |
01:58:05.00 |
-02:32:29.0 |
HIP 9155 |
26.61 |
| 2026-09-24 00:00 |
01:58:04.01 |
-02:32:36.5 |
HIP 9155 |
26.72 |
| 2026-09-24 12:00 |
01:58:03.03 |
-02:32:44.1 |
HIP 9155 |
26.83 |
| 2026-09-25 00:00 |
01:58:02.04 |
-02:32:51.7 |
HIP 9155 |
26.94 |
| 2026-09-25 12:00 |
01:58:01.04 |
-02:32:59.2 |
HIP 9155 |
27.05 |
| 2026-09-26 00:00 |
01:58:00.04 |
-02:33:06.7 |
HIP 9155 |
27.17 |
| 2026-09-26 12:00 |
01:57:59.03 |
-02:33:14.3 |
HIP 9155 |
27.29 |
| 2026-09-27 00:00 |
01:57:58.02 |
-02:33:21.8 |
HIP 9155 |
27.41 |
| 2026-09-27 12:00 |
01:57:57.01 |
-02:33:29.3 |
HIP 9155 |
27.53 |
| 2026-09-28 00:00 |
01:57:55.99 |
-02:33:36.8 |
HIP 9155 |
27.65 |
| 2026-09-28 12:00 |
01:57:54.96 |
-02:33:44.3 |
HIP 9155 |
27.78 |
| 2026-09-29 00:00 |
01:57:53.93 |
-02:33:51.8 |
HIP 9155 |
27.91 |
| 2026-09-29 12:00 |
01:57:52.90 |
-02:33:59.2 |
HIP 9155 |
28.04 |
| 2026-09-30 00:00 |
01:57:51.86 |
-02:34:06.7 |
HIP 9155 |
28.17 |
| 2026-09-30 12:00 |
01:57:50.82 |
-02:34:14.1 |
HIP 9155 |
28.31 |
| 2026-10-01 00:00 |
01:57:49.77 |
-02:34:21.6 |
HIP 9155 |
28.44 |
| 2026-10-01 12:00 |
01:57:48.72 |
-02:34:29.0 |
HIP 9155 |
28.58 |
| 2026-10-02 00:00 |
01:57:47.67 |
-02:34:36.4 |
HIP 9155 |
28.72 |
| 2026-10-02 12:00 |
01:57:46.61 |
-02:34:43.8 |
HIP 9155 |
28.87 |
| 2026-10-03 00:00 |
01:57:45.55 |
-02:34:51.1 |
HIP 9155 |
29.01 |
| 2026-10-03 12:00 |
01:57:44.48 |
-02:34:58.5 |
HIP 9155 |
29.16 |
| 2026-10-04 00:00 |
01:57:43.41 |
-02:35:05.8 |
HIP 9155 |
29.31 |
| 2026-10-04 12:00 |
01:57:42.34 |
-02:35:13.1 |
HIP 9155 |
29.46 |
| 2026-10-05 00:00 |
01:57:41.26 |
-02:35:20.4 |
HIP 9155 |
29.61 |
| 2026-10-05 12:00 |
01:57:40.18 |
-02:35:27.7 |
HIP 9155 |
29.77 |
| 2026-10-06 00:00 |
01:57:39.10 |
-02:35:35.0 |
HIP 9155 |
29.93 |
| 2026-10-06 12:00 |
01:57:38.01 |
-02:35:42.2 |
HIP 9155 |
30.08 |
| 2026-10-07 00:00 |
01:57:36.92 |
-02:35:49.5 |
HIP 9155 |
30.25 |
| 2026-10-07 12:00 |
01:57:35.83 |
-02:35:56.7 |
HIP 9155 |
30.41 |
| 2026-10-08 00:00 |
01:57:34.73 |
-02:36:03.8 |
HIP 9155 |
30.57 |
| 2026-10-08 12:00 |
01:57:33.63 |
-02:36:11.0 |
HIP 9155 |
30.74 |
| 2026-10-09 00:00 |
01:57:32.53 |
-02:36:18.1 |
HIP 9155 |
30.91 |
| 2026-10-09 12:00 |
01:57:31.43 |
-02:36:25.2 |
HIP 9155 |
31.08 |
| 2026-10-10 00:00 |
01:57:30.32 |
-02:36:32.3 |
HIP 9155 |
31.25 |
| 2026-10-10 12:00 |
01:57:29.21 |
-02:36:39.4 |
HIP 9155 |
31.42 |
| 2026-10-11 00:00 |
01:57:28.09 |
-02:36:46.4 |
HIP 9155 |
31.60 |