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) |
| 2026-03-26 00:00 |
18:13:15.96 |
+17:38:49.9 |
HIP 89187 |
19.83 |
| 2026-03-26 12:00 |
18:13:16.32 |
+17:39:24.4 |
HIP 89187 |
20.22 |
| 2026-03-27 00:00 |
18:13:16.65 |
+17:39:58.9 |
HIP 89187 |
20.61 |
| 2026-03-27 12:00 |
18:13:16.95 |
+17:40:33.4 |
HIP 89187 |
21.00 |
| 2026-03-28 00:00 |
18:13:17.22 |
+17:41:07.9 |
HIP 89187 |
21.40 |
| 2026-03-28 12:00 |
18:13:17.46 |
+17:41:42.4 |
HIP 89187 |
21.80 |
| 2026-03-29 00:00 |
18:13:17.66 |
+17:42:16.8 |
HIP 89187 |
22.19 |
| 2026-03-29 12:00 |
18:13:17.83 |
+17:42:51.2 |
HIP 89187 |
22.60 |
| 2026-03-30 00:00 |
18:13:17.97 |
+17:43:25.6 |
HIP 89187 |
23.00 |
| 2026-03-30 12:00 |
18:13:18.08 |
+17:44:00.0 |
HIP 89187 |
23.40 |
| 2026-03-31 00:00 |
18:13:18.15 |
+17:44:34.3 |
HIP 89187 |
23.80 |
| 2026-03-31 12:00 |
18:13:18.20 |
+17:45:08.6 |
HIP 89187 |
24.21 |
| 2026-04-01 00:00 |
18:13:18.21 |
+17:45:42.8 |
HIP 89187 |
24.62 |
| 2026-04-01 12:00 |
18:13:18.19 |
+17:46:17.0 |
HIP 89187 |
25.02 |
| 2026-04-02 00:00 |
18:13:18.13 |
+17:46:51.2 |
HIP 89187 |
25.43 |
| 2026-04-02 12:00 |
18:13:18.05 |
+17:47:25.3 |
HIP 89187 |
25.84 |
| 2026-04-03 00:00 |
18:13:17.93 |
+17:47:59.4 |
HIP 89187 |
26.25 |
| 2026-04-03 12:00 |
18:13:17.78 |
+17:48:33.4 |
HIP 89187 |
26.65 |
| 2026-04-04 00:00 |
18:13:17.60 |
+17:49:07.4 |
HIP 89187 |
27.06 |
| 2026-04-04 12:00 |
18:13:17.39 |
+17:49:41.3 |
HIP 89187 |
27.47 |
| 2026-04-05 00:00 |
18:13:17.15 |
+17:50:15.2 |
HIP 89187 |
27.88 |
| 2026-04-05 12:00 |
18:13:16.87 |
+17:50:49.0 |
HIP 89187 |
28.29 |
| 2026-04-06 00:00 |
18:13:16.56 |
+17:51:22.7 |
HIP 89187 |
28.70 |
| 2026-04-06 12:00 |
18:13:16.23 |
+17:51:56.4 |
HIP 89187 |
29.11 |
| 2026-04-07 00:00 |
18:13:15.85 |
+17:52:30.0 |
HIP 89187 |
29.52 |
| 2026-04-07 12:00 |
18:13:15.45 |
+17:53:03.5 |
HIP 89187 |
29.93 |
| 2026-04-08 00:00 |
18:13:15.02 |
+17:53:37.0 |
HIP 89187 |
30.34 |
| 2026-04-08 12:00 |
18:13:14.55 |
+17:54:10.4 |
HIP 89187 |
30.75 |
| 2026-04-09 00:00 |
18:13:14.06 |
+17:54:43.7 |
HIP 89187 |
31.16 |
| 2026-04-09 12:00 |
18:13:13.53 |
+17:55:16.9 |
HIP 89187 |
31.57 |
| 2026-04-10 00:00 |
18:13:12.97 |
+17:55:50.0 |
HIP 89187 |
31.98 |
| 2026-04-10 12:00 |
18:13:12.38 |
+17:56:23.1 |
HIP 89187 |
32.39 |
| 2026-04-11 00:00 |
18:13:11.75 |
+17:56:56.1 |
HIP 89141 |
32.39 |
| 2026-04-11 12:00 |
18:13:11.10 |
+17:57:29.0 |
HIP 89141 |
31.90 |
| 2026-04-12 00:00 |
18:13:10.42 |
+17:58:01.8 |
HIP 89141 |
31.41 |
| 2026-04-12 12:00 |
18:13:09.70 |
+17:58:34.4 |
HIP 89141 |
30.91 |
| 2026-04-13 00:00 |
18:13:08.95 |
+17:59:07.0 |
HIP 89141 |
30.42 |
| 2026-04-13 12:00 |
18:13:08.18 |
+17:59:39.5 |
HIP 89141 |
29.92 |
| 2026-04-14 00:00 |
18:13:07.37 |
+18:00:11.9 |
HIP 89141 |
29.42 |
| 2026-04-14 12:00 |
18:13:06.53 |
+18:00:44.2 |
HIP 89141 |
28.91 |
| 2026-04-15 00:00 |
18:13:05.66 |
+18:01:16.4 |
HIP 89141 |
28.41 |
| 2026-04-15 12:00 |
18:13:04.76 |
+18:01:48.5 |
HIP 89141 |
27.91 |
| 2026-04-16 00:00 |
18:13:03.83 |
+18:02:20.4 |
HIP 89141 |
27.40 |