Comet Archive

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C/2013 H1 (La Sagra)

メタデータ

項目 値
Designation C/2013 H1 (La Sagra)
Type C
Perihelion (tp_cal, UTC) 2013-05-19T16:02:02.639040Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:32:34Z
Obs used 270
NEO -
M1 7.200
K1 22.750
PC 0.030
オスキュレーティング軌道要素
項目 値
Epoch (epoch_cal, TDB) 2013-05-18.0000000
e 0.98542562
q (au) 2.646966
a (au) 181.617687
i (deg) 27.089519
Ω (om, deg) 84.969862
ω (w, deg) 136.581161
M (ma, deg) 359.999328

等級

C/2013 H1 (La Sagra) · Magnitude (Full range)

散乱 + 全体線形

$$ M_a = (11.300 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目 値
H0 11.300
n 6.000
gf 1.000
gb -0.500
k 0.800
δ90 10.000
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 01:06:27.12 -21:08:46.5 HIP 5056 26.15
2026-02-03 12:00 01:06:29.29 -21:08:07.4 HIP 5056 26.39
2026-02-04 00:00 01:06:31.49 -21:07:28.3 HIP 5056 26.67
2026-02-04 12:00 01:06:33.72 -21:06:49.2 HIP 5056 26.98
2026-02-05 00:00 01:06:35.98 -21:06:10.1 HIP 5056 27.31
2026-02-05 12:00 01:06:38.28 -21:05:30.9 HIP 5056 27.68
2026-02-06 00:00 01:06:40.60 -21:04:51.7 HIP 5056 28.07
2026-02-06 12:00 01:06:42.95 -21:04:12.5 HIP 5056 28.49
2026-02-07 00:00 01:06:45.34 -21:03:33.3 HIP 5056 28.93
2026-02-07 12:00 01:06:47.75 -21:02:54.1 HIP 5056 29.40
2026-02-08 00:00 01:06:50.19 -21:02:14.9 HIP 5056 29.90
2026-02-08 12:00 01:06:52.67 -21:01:35.6 HIP 5056 30.42
2026-02-09 00:00 01:06:55.17 -21:00:56.4 HIP 5056 30.96
2026-02-09 12:00 01:06:57.70 -21:00:17.1 HIP 5056 31.52
2026-02-10 00:00 01:07:00.26 -20:59:37.9 HIP 5056 32.11
2026-02-10 12:00 01:07:02.85 -20:58:58.6 HIP 5056 32.71
2026-02-11 00:00 01:07:05.47 -20:58:19.3 HIP 5056 33.34
2026-02-11 12:00 01:07:08.12 -20:57:40.1 HIP 5056 33.98
2026-02-12 00:00 01:07:10.80 -20:57:00.9 HIP 5056 34.64
2026-02-12 12:00 01:07:13.50 -20:56:21.7 HIP 5056 35.32
2026-02-13 00:00 01:07:16.23 -20:55:42.4 HIP 5056 36.02
2026-02-13 12:00 01:07:18.99 -20:55:03.3 HIP 5068 36.66
2026-02-14 00:00 01:07:21.78 -20:54:24.1 HIP 5068 37.10
2026-02-14 12:00 01:07:24.60 -20:53:44.9 HIP 5068 37.55
2026-02-15 00:00 01:07:27.44 -20:53:05.8 HIP 5068 38.04
2026-02-15 12:00 01:07:30.31 -20:52:26.7 HIP 5068 38.54
2026-02-16 00:00 01:07:33.21 -20:51:47.7 HIP 5068 39.06
2026-02-16 12:00 01:07:36.13 -20:51:08.6 HIP 5068 39.61
2026-02-17 00:00 01:07:39.08 -20:50:29.6 HIP 5068 40.18
2026-02-17 12:00 01:07:42.06 -20:49:50.7 HIP 5068 40.77
2026-02-18 00:00 01:07:45.06 -20:49:11.8 HIP 5068 41.38
2026-02-18 12:00 01:07:48.09 -20:48:32.9 HIP 5068 42.01
2026-02-19 00:00 01:07:51.14 -20:47:54.1 HIP 5068 42.65
2026-02-19 12:00 01:07:54.22 -20:47:15.3 HIP 5452 43.08
2026-02-20 00:00 01:07:57.32 -20:46:36.6 HIP 5452 42.13
2026-02-20 12:00 01:08:00.45 -20:45:57.9 HIP 5452 41.17
2026-02-21 00:00 01:08:03.60 -20:45:19.3 HIP 5452 40.22
2026-02-21 12:00 01:08:06.78 -20:44:40.8 HIP 5452 39.26
2026-02-22 00:00 01:08:09.98 -20:44:02.3 HIP 5452 38.30
2026-02-22 12:00 01:08:13.20 -20:43:23.9 HIP 5452 37.34
2026-02-23 00:00 01:08:16.45 -20:42:45.5 HIP 5452 36.38
2026-02-23 12:00 01:08:19.72 -20:42:07.2 HIP 5452 35.42
2026-02-24 00:00 01:08:23.02 -20:41:29.0 HIP 5452 34.45