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
$$
M_a = (10.938 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.938 |
| n |
2.000 |
| gf |
0.962 |
| gb |
-0.666 |
| k |
0.800 |
| δ90 |
8.408 |
| 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) |
| 2026-06-01 00:00 |
18:09:48.56 |
+18:38:08.7 |
HIP 89070 |
15.29 |
| 2026-06-01 12:00 |
18:09:45.54 |
+18:38:20.7 |
HIP 88875 |
15.94 |
| 2026-06-02 00:00 |
18:09:42.50 |
+18:38:32.5 |
HIP 88875 |
15.22 |
| 2026-06-02 12:00 |
18:09:39.45 |
+18:38:44.0 |
HIP 88875 |
14.51 |
| 2026-06-03 00:00 |
18:09:36.39 |
+18:38:55.1 |
HIP 88875 |
13.79 |
| 2026-06-03 12:00 |
18:09:33.32 |
+18:39:06.0 |
HIP 88875 |
13.08 |
| 2026-06-04 00:00 |
18:09:30.24 |
+18:39:16.6 |
HIP 88875 |
12.36 |
| 2026-06-04 12:00 |
18:09:27.14 |
+18:39:26.9 |
HIP 88875 |
11.65 |
| 2026-06-05 00:00 |
18:09:24.04 |
+18:39:36.9 |
HIP 88875 |
10.94 |
| 2026-06-05 12:00 |
18:09:20.92 |
+18:39:46.6 |
HIP 88875 |
10.24 |
| 2026-06-06 00:00 |
18:09:17.80 |
+18:39:56.1 |
HIP 88875 |
9.54 |
| 2026-06-06 12:00 |
18:09:14.67 |
+18:40:05.2 |
HIP 88875 |
8.84 |
| 2026-06-07 00:00 |
18:09:11.52 |
+18:40:14.0 |
HIP 88875 |
8.15 |
| 2026-06-07 12:00 |
18:09:08.37 |
+18:40:22.6 |
HIP 88875 |
7.47 |
| 2026-06-08 00:00 |
18:09:05.21 |
+18:40:30.8 |
HIP 88875 |
6.81 |
| 2026-06-08 12:00 |
18:09:02.04 |
+18:40:38.7 |
HIP 88875 |
6.16 |
| 2026-06-09 00:00 |
18:08:58.86 |
+18:40:46.4 |
HIP 88875 |
5.54 |
| 2026-06-09 12:00 |
18:08:55.67 |
+18:40:53.7 |
HIP 88875 |
4.96 |
| 2026-06-10 00:00 |
18:08:52.48 |
+18:41:00.8 |
HIP 88875 |
4.42 |
| 2026-06-10 12:00 |
18:08:49.28 |
+18:41:07.5 |
HIP 88875 |
3.96 |
| 2026-06-11 00:00 |
18:08:46.07 |
+18:41:13.9 |
HIP 88875 |
3.60 |
| 2026-06-11 12:00 |
18:08:42.85 |
+18:41:20.1 |
HIP 88875 |
3.37 |
| 2026-06-12 00:00 |
18:08:39.63 |
+18:41:25.9 |
HIP 88875 |
3.30 |
| 2026-06-12 12:00 |
18:08:36.40 |
+18:41:31.4 |
HIP 88875 |
3.41 |
| 2026-06-13 00:00 |
18:08:33.16 |
+18:41:36.6 |
HIP 88875 |
3.67 |
| 2026-06-13 12:00 |
18:08:29.92 |
+18:41:41.5 |
HIP 88875 |
4.06 |
| 2026-06-14 00:00 |
18:08:26.67 |
+18:41:46.2 |
HIP 88875 |
4.55 |
| 2026-06-14 12:00 |
18:08:23.42 |
+18:41:50.4 |
HIP 88875 |
5.10 |
| 2026-06-15 00:00 |
18:08:20.16 |
+18:41:54.4 |
HIP 88875 |
5.70 |
| 2026-06-15 12:00 |
18:08:16.90 |
+18:41:58.1 |
HIP 88875 |
6.34 |
| 2026-06-16 00:00 |
18:08:13.64 |
+18:42:01.5 |
HIP 88875 |
7.00 |
| 2026-06-16 12:00 |
18:08:10.37 |
+18:42:04.6 |
HIP 88875 |
7.69 |
| 2026-06-17 00:00 |
18:08:07.09 |
+18:42:07.3 |
HIP 88875 |
8.38 |
| 2026-06-17 12:00 |
18:08:03.82 |
+18:42:09.8 |
HIP 88875 |
9.09 |
| 2026-06-18 00:00 |
18:08:00.54 |
+18:42:11.9 |
HIP 88875 |
9.81 |
| 2026-06-18 12:00 |
18:07:57.26 |
+18:42:13.7 |
HIP 88875 |
10.53 |
| 2026-06-19 00:00 |
18:07:53.97 |
+18:42:15.2 |
HIP 88808 |
10.62 |
| 2026-06-19 12:00 |
18:07:50.68 |
+18:42:16.5 |
HIP 88808 |
10.48 |
| 2026-06-20 00:00 |
18:07:47.40 |
+18:42:17.4 |
HIP 88808 |
10.40 |
| 2026-06-20 12:00 |
18:07:44.11 |
+18:42:18.0 |
HIP 88808 |
10.38 |
| 2026-06-21 00:00 |
18:07:40.81 |
+18:42:18.2 |
HIP 88808 |
10.43 |
| 2026-06-21 12:00 |
18:07:37.52 |
+18:42:18.2 |
HIP 88808 |
10.54 |
| 2026-06-22 00:00 |
18:07:34.23 |
+18:42:17.9 |
HIP 88808 |
10.71 |