C/2007 D1 (LINEAR)
メタデータ
| 項目 |
値 |
| Designation |
C/2007 D1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-06-18T20:48:33.595200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:04Z |
| Obs used |
525 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-06-26.0000000 |
| e |
0.99994869 |
| q (au) |
8.793366 |
| a (au) |
171366.674364 |
| i (deg) |
41.507013 |
| Ω (om, deg) |
171.084868 |
| ω (w, deg) |
340.143581 |
| M (ma, deg) |
0.000005 |
等級
散乱 + 全体線形
$$
M_a = (10.943 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.943 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.666 |
| k |
0.800 |
| δ90 |
8.896 |
| 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 |
18:09:59.06 |
+16:46:45.5 |
HIP 89023 |
18.31 |
| 2026-02-03 12:00 |
18:10:02.33 |
+16:47:08.4 |
HIP 89023 |
18.61 |
| 2026-02-04 00:00 |
18:10:05.58 |
+16:47:31.4 |
HIP 89023 |
18.94 |
| 2026-02-04 12:00 |
18:10:08.81 |
+16:47:54.7 |
HIP 89023 |
19.31 |
| 2026-02-05 00:00 |
18:10:12.01 |
+16:48:18.2 |
HIP 89023 |
19.72 |
| 2026-02-05 12:00 |
18:10:15.20 |
+16:48:41.9 |
HIP 89023 |
20.16 |
| 2026-02-06 00:00 |
18:10:18.36 |
+16:49:05.8 |
HIP 89023 |
20.63 |
| 2026-02-06 12:00 |
18:10:21.50 |
+16:49:29.9 |
HIP 89023 |
21.12 |
| 2026-02-07 00:00 |
18:10:24.62 |
+16:49:54.3 |
HIP 89023 |
21.65 |
| 2026-02-07 12:00 |
18:10:27.72 |
+16:50:18.8 |
HIP 89023 |
22.19 |
| 2026-02-08 00:00 |
18:10:30.79 |
+16:50:43.6 |
HIP 89023 |
22.75 |
| 2026-02-08 12:00 |
18:10:33.84 |
+16:51:08.6 |
HIP 89023 |
23.33 |
| 2026-02-09 00:00 |
18:10:36.87 |
+16:51:33.8 |
HIP 89023 |
23.93 |
| 2026-02-09 12:00 |
18:10:39.88 |
+16:51:59.1 |
HIP 89023 |
24.55 |
| 2026-02-10 00:00 |
18:10:42.86 |
+16:52:24.7 |
HIP 89023 |
25.18 |
| 2026-02-10 12:00 |
18:10:45.82 |
+16:52:50.5 |
HIP 89023 |
25.82 |
| 2026-02-11 00:00 |
18:10:48.75 |
+16:53:16.5 |
HIP 89023 |
26.47 |
| 2026-02-11 12:00 |
18:10:51.66 |
+16:53:42.7 |
HIP 89023 |
27.14 |
| 2026-02-12 00:00 |
18:10:54.55 |
+16:54:09.0 |
HIP 89023 |
27.81 |
| 2026-02-12 12:00 |
18:10:57.41 |
+16:54:35.6 |
HIP 89023 |
28.49 |
| 2026-02-13 00:00 |
18:11:00.24 |
+16:55:02.3 |
HIP 89267 |
29.08 |
| 2026-02-13 12:00 |
18:11:03.06 |
+16:55:29.3 |
HIP 89267 |
28.31 |
| 2026-02-14 00:00 |
18:11:05.84 |
+16:55:56.4 |
HIP 89267 |
27.55 |
| 2026-02-14 12:00 |
18:11:08.61 |
+16:56:23.7 |
HIP 89267 |
26.80 |
| 2026-02-15 00:00 |
18:11:11.34 |
+16:56:51.2 |
HIP 89267 |
26.06 |
| 2026-02-15 12:00 |
18:11:14.05 |
+16:57:18.9 |
HIP 89267 |
25.33 |
| 2026-02-16 00:00 |
18:11:16.74 |
+16:57:46.8 |
HIP 89267 |
24.60 |
| 2026-02-16 12:00 |
18:11:19.40 |
+16:58:14.8 |
HIP 89267 |
23.89 |
| 2026-02-17 00:00 |
18:11:22.03 |
+16:58:43.0 |
HIP 89267 |
23.19 |
| 2026-02-17 12:00 |
18:11:24.64 |
+16:59:11.4 |
HIP 89267 |
22.50 |
| 2026-02-18 00:00 |
18:11:27.22 |
+16:59:39.9 |
HIP 89267 |
21.82 |
| 2026-02-18 12:00 |
18:11:29.77 |
+17:00:08.6 |
HIP 89267 |
21.15 |
| 2026-02-19 00:00 |
18:11:32.30 |
+17:00:37.5 |
HIP 89267 |
20.50 |
| 2026-02-19 12:00 |
18:11:34.80 |
+17:01:06.6 |
HIP 89267 |
19.86 |
| 2026-02-20 00:00 |
18:11:37.27 |
+17:01:35.8 |
HIP 89267 |
19.24 |
| 2026-02-20 12:00 |
18:11:39.72 |
+17:02:05.1 |
HIP 89208 |
18.59 |
| 2026-02-21 00:00 |
18:11:42.14 |
+17:02:34.7 |
HIP 89208 |
17.88 |
| 2026-02-21 12:00 |
18:11:44.53 |
+17:03:04.3 |
HIP 89208 |
17.17 |
| 2026-02-22 00:00 |
18:11:46.89 |
+17:03:34.1 |
HIP 89208 |
16.47 |
| 2026-02-22 12:00 |
18:11:49.23 |
+17:04:04.1 |
HIP 89208 |
15.77 |
| 2026-02-23 00:00 |
18:11:51.54 |
+17:04:34.2 |
HIP 89208 |
15.07 |
| 2026-02-23 12:00 |
18:11:53.82 |
+17:05:04.5 |
HIP 89208 |
14.38 |
| 2026-02-24 00:00 |
18:11:56.07 |
+17:05:34.9 |
HIP 89208 |
13.70 |