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266P/Christensen

メタデータ

項目 値
Designation 266P/Christensen
Type P
Perihelion (tp_cal, UTC) 2020-04-19T20:13:28.701120Z
Orbit solution date (soln_date, UTC) 2021-05-04T16:40:00Z
Obs used 520
NEO -
M1 11.000
K1 16.250
PC 0.030
オスキュレーティング軌道要素
項目 値
Epoch (epoch_cal, TDB) 2017-06-27.0000000
e 0.33964561
q (au) 2.332338
a (au) 3.531948
i (deg) 3.427133
Ω (om, deg) 5.003630
ω (w, deg) 98.009686
M (ma, deg) 207.380781

等級

266P/Christensen · Magnitude (Full range)

散乱 + 全体線形

$$ M_a = (14.294 + 5.175\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目 値
H0 14.294
n 5.175
gf 0.862
gb -0.500
k 0.898
δ90 1.451
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 00:18:02.37 +02:47:35.2 HIP 1384 21.83
2026-02-03 12:00 00:18:37.72 +02:51:37.7 HIP 1609 25.17
2026-02-04 00:00 00:19:13.20 +02:55:40.9 HIP 1609 15.42
2026-02-04 12:00 00:19:48.80 +02:59:44.8 HIP 1609 5.65
2026-02-05 00:00 00:20:24.54 +03:03:49.5 HIP 1609 4.16
2026-02-05 12:00 00:21:00.40 +03:07:54.9 HIP 1609 14.00
2026-02-06 00:00 00:21:36.39 +03:12:01.1 HIP 1653 19.92
2026-02-06 12:00 00:22:12.50 +03:16:07.9 HIP 1653 24.69
2026-02-07 00:00 00:22:48.74 +03:20:15.5 HIP 1943 26.26
2026-02-07 12:00 00:23:25.11 +03:24:23.8 HIP 1943 17.20
2026-02-08 00:00 00:24:01.60 +03:28:32.7 HIP 1943 10.04
2026-02-08 12:00 00:24:38.21 +03:32:42.4 HIP 1943 10.32
2026-02-09 00:00 00:25:14.94 +03:36:52.7 HIP 1943 17.74
2026-02-09 12:00 00:25:51.80 +03:41:03.8 HIP 2080 10.48
2026-02-10 00:00 00:26:28.78 +03:45:15.5 HIP 2080 5.27
2026-02-10 12:00 00:27:05.88 +03:49:27.8 HIP 2080 12.32
2026-02-11 00:00 00:27:43.10 +03:53:40.8 HIP 2080 22.00
2026-02-11 12:00 00:28:20.44 +03:57:54.5 HIP 2080 32.03
2026-02-12 00:00 00:28:57.90 +04:02:08.8 HIP 2391 29.15
2026-02-12 12:00 00:29:35.48 +04:06:23.7 HIP 2391 19.34
2026-02-13 00:00 00:30:13.18 +04:10:39.3 HIP 2391 10.48
2026-02-13 12:00 00:30:50.99 +04:14:55.5 HIP 2391 7.67
2026-02-14 00:00 00:31:28.92 +04:19:12.3 HIP 2391 14.93
2026-02-14 12:00 00:32:06.97 +04:23:29.7 HIP 2391 24.57
2026-02-15 00:00 00:32:45.13 +04:27:47.7 HIP 2510 26.80
2026-02-15 12:00 00:33:23.41 +04:32:06.3 HIP 2659 25.15
2026-02-16 00:00 00:34:01.80 +04:36:25.5 HIP 2736 19.36
2026-02-16 12:00 00:34:40.31 +04:40:45.3 HIP 2736 18.35
2026-02-17 00:00 00:35:18.93 +04:45:05.6 HIP 2736 22.82
2026-02-17 12:00 00:35:57.66 +04:49:26.5 HIP 2736 30.48
2026-02-18 00:00 00:36:36.50 +04:53:47.9 HIP 2918 31.37
2026-02-18 12:00 00:37:15.45 +04:58:09.9 HIP 2918 26.98
2026-02-19 00:00 00:37:54.52 +05:02:32.4 HIP 2918 26.42
2026-02-19 12:00 00:38:33.69 +05:06:55.4 HIP 2918 29.94
2026-02-20 00:00 00:39:12.97 +05:11:19.0 HIP 2918 36.40
2026-02-20 12:00 00:39:52.36 +05:15:43.1 HIP 3270 32.73
2026-02-21 00:00 00:40:31.86 +05:20:07.6 HIP 3270 22.23
2026-02-21 12:00 00:41:11.47 +05:24:32.7 HIP 3270 12.21
2026-02-22 00:00 00:41:51.18 +05:28:58.3 HIP 3270 6.08
2026-02-22 12:00 00:42:30.99 +05:33:24.3 HIP 3338 7.13
2026-02-23 00:00 00:43:10.91 +05:37:50.8 HIP 3338 9.85
2026-02-23 12:00 00:43:50.94 +05:42:17.7 HIP 3460 12.94
2026-02-24 00:00 00:44:31.07 +05:46:45.1 HIP 3460 7.73