Comet Archive

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C/1953 X1 (Pajdusakova)

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

C/1953 X1 (Pajdusakova) · Magnitude (Full range)

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)
2026-02-03 00:00 01:54:46.04 -02:40:48.9 HIP 8720 39.54
2026-02-03 12:00 01:54:46.30 -02:40:43.0 HIP 8720 39.63
2026-02-04 00:00 01:54:46.57 -02:40:37.1 HIP 8720 39.71
2026-02-04 12:00 01:54:46.85 -02:40:31.1 HIP 8720 39.80
2026-02-05 00:00 01:54:47.14 -02:40:25.1 HIP 8720 39.89
2026-02-05 12:00 01:54:47.44 -02:40:19.1 HIP 8720 39.98
2026-02-06 00:00 01:54:47.75 -02:40:13.0 HIP 8720 40.08
2026-02-06 12:00 01:54:48.07 -02:40:06.8 HIP 8720 40.18
2026-02-07 00:00 01:54:48.40 -02:40:00.6 HIP 8720 40.28
2026-02-07 12:00 01:54:48.73 -02:39:54.4 HIP 8720 40.38
2026-02-08 00:00 01:54:49.08 -02:39:48.2 HIP 8720 40.49
2026-02-08 12:00 01:54:49.44 -02:39:41.9 HIP 8720 40.60
2026-02-09 00:00 01:54:49.80 -02:39:35.5 HIP 8720 40.71
2026-02-09 12:00 01:54:50.18 -02:39:29.2 HIP 8720 40.83
2026-02-10 00:00 01:54:50.56 -02:39:22.7 HIP 8720 40.94
2026-02-10 12:00 01:54:50.96 -02:39:16.3 HIP 8720 41.06
2026-02-11 00:00 01:54:51.36 -02:39:09.8 HIP 8720 41.18
2026-02-11 12:00 01:54:51.77 -02:39:03.3 HIP 8720 41.31
2026-02-12 00:00 01:54:52.20 -02:38:56.8 HIP 8720 41.44
2026-02-12 12:00 01:54:52.63 -02:38:50.2 HIP 9005 41.54
2026-02-13 00:00 01:54:53.07 -02:38:43.5 HIP 9005 41.60
2026-02-13 12:00 01:54:53.52 -02:38:36.9 HIP 9005 41.66
2026-02-14 00:00 01:54:53.98 -02:38:30.2 HIP 9005 41.72
2026-02-14 12:00 01:54:54.45 -02:38:23.5 HIP 9005 41.78
2026-02-15 00:00 01:54:54.92 -02:38:16.7 HIP 9005 41.84
2026-02-15 12:00 01:54:55.41 -02:38:10.0 HIP 9005 41.90
2026-02-16 00:00 01:54:55.91 -02:38:03.1 HIP 9005 41.96
2026-02-16 12:00 01:54:56.41 -02:37:56.3 HIP 9005 42.02
2026-02-17 00:00 01:54:56.92 -02:37:49.4 HIP 9005 42.09
2026-02-17 12:00 01:54:57.45 -02:37:42.5 HIP 9005 42.15
2026-02-18 00:00 01:54:57.98 -02:37:35.6 HIP 9005 42.21
2026-02-18 12:00 01:54:58.52 -02:37:28.6 HIP 9005 42.27
2026-02-19 00:00 01:54:59.06 -02:37:21.7 HIP 9005 42.33
2026-02-19 12:00 01:54:59.62 -02:37:14.6 HIP 9005 42.40
2026-02-20 00:00 01:55:00.19 -02:37:07.6 HIP 9005 42.46
2026-02-20 12:00 01:55:00.76 -02:37:00.5 HIP 9005 42.52
2026-02-21 00:00 01:55:01.34 -02:36:53.5 HIP 9005 42.59
2026-02-21 12:00 01:55:01.94 -02:36:46.3 HIP 9005 42.65
2026-02-22 00:00 01:55:02.54 -02:36:39.2 HIP 9005 42.72
2026-02-22 12:00 01:55:03.14 -02:36:32.1 HIP 9005 42.78
2026-02-23 00:00 01:55:03.76 -02:36:24.9 HIP 9005 42.85
2026-02-23 12:00 01:55:04.38 -02:36:17.7 HIP 9005 42.92
2026-02-24 00:00 01:55:05.02 -02:36:10.4 HIP 9005 42.99