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298P/Christensen

メタデータ

項目 値
Designation 298P/Christensen
Type P
Perihelion (tp_cal, UTC) 2007-03-05T06:56:45.335040Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:28:17Z
Obs used 145
NEO -
M1 16.100
K1 8.250
PC -
オスキュレーティング軌道要素
項目 値
Epoch (epoch_cal, TDB) 2007-08-29.0000000
e 0.41245123
q (au) 2.050749
a (au) 3.490347
i (deg) 8.021637
Ω (om, deg) 57.117855
ω (w, deg) 95.623968
M (ma, deg) 26.709372

等級

298P/Christensen · Magnitude (Full range)

散乱 + 全体線形

$$ M_a = (13.973 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

モデル定数

項目 値
H0 13.973
n 6.000
gf 1.000
gb -1.000
k 1.000
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 01:22:59.23 +06:23:52.1 HIP 6521 13.30
2026-02-03 12:00 01:23:19.89 +06:26:40.3 HIP 6521 7.46
2026-02-04 00:00 01:23:40.72 +06:29:29.3 HIP 6521 1.59
2026-02-04 12:00 01:24:01.72 +06:32:19.0 HIP 6521 4.39
2026-02-05 00:00 01:24:22.88 +06:35:09.5 HIP 6572 6.13
2026-02-05 12:00 01:24:44.22 +06:38:00.7 HIP 6572 10.11
2026-02-06 00:00 01:25:05.72 +06:40:52.7 HIP 6572 15.51
2026-02-06 12:00 01:25:27.38 +06:43:45.4 HIP 6572 21.30
2026-02-07 00:00 01:25:49.21 +06:46:38.7 HIP 6788 25.50
2026-02-07 12:00 01:26:11.21 +06:49:32.8 HIP 6788 19.32
2026-02-08 00:00 01:26:33.36 +06:52:27.6 HIP 6788 13.11
2026-02-08 12:00 01:26:55.68 +06:55:23.1 HIP 6788 6.88
2026-02-09 00:00 01:27:18.16 +06:58:19.2 HIP 6788 1.05
2026-02-09 12:00 01:27:40.79 +07:01:16.1 HIP 6788 5.90
2026-02-10 00:00 01:28:03.59 +07:04:13.6 HIP 6788 12.25
2026-02-10 12:00 01:28:26.55 +07:07:11.8 HIP 6915 13.84
2026-02-11 00:00 01:28:49.66 +07:10:10.6 HIP 6915 8.19
2026-02-11 12:00 01:29:12.93 +07:13:10.1 HIP 6915 5.10
2026-02-12 00:00 01:29:36.35 +07:16:10.2 HIP 6915 8.38
2026-02-12 12:00 01:29:59.93 +07:19:11.0 HIP 6915 14.17
2026-02-13 00:00 01:30:23.67 +07:22:12.4 HIP 6915 20.49
2026-02-13 12:00 01:30:47.55 +07:25:14.4 HIP 7071 17.33
2026-02-14 00:00 01:31:11.59 +07:28:17.0 HIP 7071 13.48
2026-02-14 12:00 01:31:35.78 +07:31:20.2 HIP 7071 12.37
2026-02-15 00:00 01:32:00.12 +07:34:24.0 HIP 7071 14.68
2026-02-15 12:00 01:32:24.61 +07:37:28.4 HIP 7071 19.26
2026-02-16 00:00 01:32:49.25 +07:40:33.4 HIP 7071 24.91
2026-02-16 12:00 01:33:14.03 +07:43:39.0 HIP 7243 28.90
2026-02-17 00:00 01:33:38.96 +07:46:45.1 HIP 7243 26.28
2026-02-17 12:00 01:34:04.04 +07:49:51.8 HIP 7243 25.34
2026-02-18 00:00 01:34:29.26 +07:52:59.0 HIP 7366 24.21
2026-02-18 12:00 01:34:54.63 +07:56:06.8 HIP 7366 20.39
2026-02-19 00:00 01:35:20.14 +07:59:15.1 HIP 7366 18.54
2026-02-19 12:00 01:35:45.79 +08:02:23.9 HIP 7505 19.00
2026-02-20 00:00 01:36:11.58 +08:05:33.3 HIP 7505 17.55
2026-02-20 12:00 01:36:37.51 +08:08:43.1 HIP 7505 18.89
2026-02-21 00:00 01:37:03.58 +08:11:53.5 HIP 7505 22.55
2026-02-21 12:00 01:37:29.79 +08:15:04.3 HIP 7686 23.03
2026-02-22 00:00 01:37:56.13 +08:18:15.7 HIP 7686 18.75
2026-02-22 12:00 01:38:22.61 +08:21:27.5 HIP 7686 16.66
2026-02-23 00:00 01:38:49.23 +08:24:39.7 HIP 7686 17.61
2026-02-23 12:00 01:39:15.97 +08:27:52.5 HIP 7686 21.23
2026-02-24 00:00 01:39:42.86 +08:31:05.6 HIP 7819 19.42