メタデータ
| 項目 |
値 |
| Designation |
C/1953 X1 (Pajdusakova) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-01-24T16:04:30.538560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
8 |
| 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) |
1953-12-12.0000000 |
| e |
0.99999670 |
| q (au) |
0.072306 |
| a (au) |
21896.357847 |
| i (deg) |
13.570931 |
| Ω (om, deg) |
115.246250 |
| ω (w, deg) |
94.072943 |
| M (ma, deg) |
359.999987 |
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) |
| 2026-03-26 00:00 |
01:55:55.71 |
-02:28:38.4 |
HIP 9155 |
37.67 |
| 2026-03-26 12:00 |
01:55:56.72 |
-02:28:31.0 |
HIP 9155 |
37.40 |
| 2026-03-27 00:00 |
01:55:57.74 |
-02:28:23.5 |
HIP 9155 |
37.12 |
| 2026-03-27 12:00 |
01:55:58.77 |
-02:28:16.0 |
HIP 9155 |
36.84 |
| 2026-03-28 00:00 |
01:55:59.80 |
-02:28:08.6 |
HIP 9155 |
36.56 |
| 2026-03-28 12:00 |
01:56:00.83 |
-02:28:01.1 |
HIP 9155 |
36.28 |
| 2026-03-29 00:00 |
01:56:01.87 |
-02:27:53.7 |
HIP 9155 |
36.00 |
| 2026-03-29 12:00 |
01:56:02.90 |
-02:27:46.3 |
HIP 9155 |
35.72 |
| 2026-03-30 00:00 |
01:56:03.95 |
-02:27:38.9 |
HIP 9155 |
35.44 |
| 2026-03-30 12:00 |
01:56:04.99 |
-02:27:31.5 |
HIP 9155 |
35.15 |
| 2026-03-31 00:00 |
01:56:06.04 |
-02:27:24.2 |
HIP 9155 |
34.87 |
| 2026-03-31 12:00 |
01:56:07.10 |
-02:27:16.8 |
HIP 9155 |
34.59 |
| 2026-04-01 00:00 |
01:56:08.15 |
-02:27:09.5 |
HIP 9155 |
34.31 |
| 2026-04-01 12:00 |
01:56:09.22 |
-02:27:02.2 |
HIP 9155 |
34.02 |
| 2026-04-02 00:00 |
01:56:10.28 |
-02:26:54.9 |
HIP 9155 |
33.74 |
| 2026-04-02 12:00 |
01:56:11.34 |
-02:26:47.7 |
HIP 9155 |
33.46 |
| 2026-04-03 00:00 |
01:56:12.41 |
-02:26:40.4 |
HIP 9155 |
33.17 |
| 2026-04-03 12:00 |
01:56:13.49 |
-02:26:33.2 |
HIP 9155 |
32.89 |
| 2026-04-04 00:00 |
01:56:14.56 |
-02:26:26.0 |
HIP 9155 |
32.60 |
| 2026-04-04 12:00 |
01:56:15.64 |
-02:26:18.8 |
HIP 9155 |
32.32 |
| 2026-04-05 00:00 |
01:56:16.72 |
-02:26:11.7 |
HIP 9155 |
32.03 |
| 2026-04-05 12:00 |
01:56:17.80 |
-02:26:04.5 |
HIP 9155 |
31.75 |
| 2026-04-06 00:00 |
01:56:18.89 |
-02:25:57.4 |
HIP 9155 |
31.46 |
| 2026-04-06 12:00 |
01:56:19.98 |
-02:25:50.3 |
HIP 9155 |
31.18 |
| 2026-04-07 00:00 |
01:56:21.07 |
-02:25:43.2 |
HIP 9155 |
30.89 |
| 2026-04-07 12:00 |
01:56:22.16 |
-02:25:36.2 |
HIP 9155 |
30.61 |
| 2026-04-08 00:00 |
01:56:23.26 |
-02:25:29.2 |
HIP 9155 |
30.32 |
| 2026-04-08 12:00 |
01:56:24.36 |
-02:25:22.2 |
HIP 9155 |
30.04 |
| 2026-04-09 00:00 |
01:56:25.46 |
-02:25:15.2 |
HIP 9155 |
29.75 |
| 2026-04-09 12:00 |
01:56:26.56 |
-02:25:08.3 |
HIP 9155 |
29.47 |
| 2026-04-10 00:00 |
01:56:27.67 |
-02:25:01.4 |
HIP 9155 |
29.19 |
| 2026-04-10 12:00 |
01:56:28.77 |
-02:24:54.5 |
HIP 9155 |
28.90 |
| 2026-04-11 00:00 |
01:56:29.88 |
-02:24:47.6 |
HIP 9155 |
28.62 |
| 2026-04-11 12:00 |
01:56:30.99 |
-02:24:40.8 |
HIP 9155 |
28.33 |
| 2026-04-12 00:00 |
01:56:32.10 |
-02:24:34.0 |
HIP 9155 |
28.05 |
| 2026-04-12 12:00 |
01:56:33.21 |
-02:24:27.2 |
HIP 9155 |
27.77 |
| 2026-04-13 00:00 |
01:56:34.33 |
-02:24:20.4 |
HIP 9155 |
27.49 |
| 2026-04-13 12:00 |
01:56:35.44 |
-02:24:13.7 |
HIP 9155 |
27.20 |
| 2026-04-14 00:00 |
01:56:36.56 |
-02:24:07.0 |
HIP 9155 |
26.92 |
| 2026-04-14 12:00 |
01:56:37.68 |
-02:24:00.4 |
HIP 9155 |
26.64 |
| 2026-04-15 00:00 |
01:56:38.80 |
-02:23:53.8 |
HIP 9155 |
26.36 |
| 2026-04-15 12:00 |
01:56:39.92 |
-02:23:47.2 |
HIP 9155 |
26.08 |
| 2026-04-16 00:00 |
01:56:41.04 |
-02:23:40.6 |
HIP 9155 |
25.80 |