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) |
| 2026-09-20 00:00 |
18:01:35.97 |
+17:34:18.1 |
HIP 88200 |
12.56 |
| 2026-09-20 12:00 |
18:01:36.28 |
+17:33:42.9 |
HIP 88200 |
12.70 |
| 2026-09-21 00:00 |
18:01:36.63 |
+17:33:07.8 |
HIP 88200 |
12.88 |
| 2026-09-21 12:00 |
18:01:37.02 |
+17:32:32.6 |
HIP 88200 |
13.09 |
| 2026-09-22 00:00 |
18:01:37.43 |
+17:31:57.5 |
HIP 88200 |
13.33 |
| 2026-09-22 12:00 |
18:01:37.87 |
+17:31:22.3 |
HIP 88200 |
13.60 |
| 2026-09-23 00:00 |
18:01:38.34 |
+17:30:47.2 |
HIP 88200 |
13.90 |
| 2026-09-23 12:00 |
18:01:38.85 |
+17:30:12.1 |
HIP 88200 |
14.22 |
| 2026-09-24 00:00 |
18:01:39.39 |
+17:29:37.0 |
HIP 88200 |
14.56 |
| 2026-09-24 12:00 |
18:01:39.95 |
+17:29:01.9 |
HIP 88200 |
14.93 |
| 2026-09-25 00:00 |
18:01:40.55 |
+17:28:26.9 |
HIP 88200 |
15.32 |
| 2026-09-25 12:00 |
18:01:41.18 |
+17:27:51.8 |
HIP 88200 |
15.73 |
| 2026-09-26 00:00 |
18:01:41.84 |
+17:27:16.8 |
HIP 88187 |
16.01 |
| 2026-09-26 12:00 |
18:01:42.53 |
+17:26:41.9 |
HIP 88187 |
16.27 |
| 2026-09-27 00:00 |
18:01:43.25 |
+17:26:06.9 |
HIP 88187 |
16.56 |
| 2026-09-27 12:00 |
18:01:44.01 |
+17:25:32.0 |
HIP 88187 |
16.88 |
| 2026-09-28 00:00 |
18:01:44.79 |
+17:24:57.2 |
HIP 88187 |
17.21 |
| 2026-09-28 12:00 |
18:01:45.60 |
+17:24:22.3 |
HIP 88187 |
17.57 |
| 2026-09-29 00:00 |
18:01:46.45 |
+17:23:47.5 |
HIP 88187 |
17.95 |
| 2026-09-29 12:00 |
18:01:47.32 |
+17:23:12.8 |
HIP 88187 |
18.34 |
| 2026-09-30 00:00 |
18:01:48.23 |
+17:22:38.1 |
HIP 88395 |
18.38 |
| 2026-09-30 12:00 |
18:01:49.17 |
+17:22:03.4 |
HIP 88395 |
17.99 |
| 2026-10-01 00:00 |
18:01:50.13 |
+17:21:28.8 |
HIP 88395 |
17.60 |
| 2026-10-01 12:00 |
18:01:51.13 |
+17:20:54.3 |
HIP 88395 |
17.22 |
| 2026-10-02 00:00 |
18:01:52.16 |
+17:20:19.8 |
HIP 88395 |
16.85 |
| 2026-10-02 12:00 |
18:01:53.22 |
+17:19:45.3 |
HIP 88395 |
16.48 |
| 2026-10-03 00:00 |
18:01:54.31 |
+17:19:10.9 |
HIP 88395 |
16.12 |
| 2026-10-03 12:00 |
18:01:55.43 |
+17:18:36.6 |
HIP 88395 |
15.78 |
| 2026-10-04 00:00 |
18:01:56.58 |
+17:18:02.3 |
HIP 88395 |
15.44 |
| 2026-10-04 12:00 |
18:01:57.76 |
+17:17:28.2 |
HIP 88395 |
15.12 |
| 2026-10-05 00:00 |
18:01:58.97 |
+17:16:54.0 |
HIP 88395 |
14.81 |
| 2026-10-05 12:00 |
18:02:00.21 |
+17:16:20.0 |
HIP 88395 |
14.51 |
| 2026-10-06 00:00 |
18:02:01.48 |
+17:15:46.0 |
HIP 88395 |
14.23 |
| 2026-10-06 12:00 |
18:02:02.79 |
+17:15:12.1 |
HIP 88395 |
13.97 |
| 2026-10-07 00:00 |
18:02:04.12 |
+17:14:38.3 |
HIP 88395 |
13.72 |
| 2026-10-07 12:00 |
18:02:05.48 |
+17:14:04.5 |
HIP 88395 |
13.49 |
| 2026-10-08 00:00 |
18:02:06.87 |
+17:13:30.9 |
HIP 88395 |
13.28 |
| 2026-10-08 12:00 |
18:02:08.29 |
+17:12:57.3 |
HIP 88395 |
13.10 |
| 2026-10-09 00:00 |
18:02:09.74 |
+17:12:23.8 |
HIP 88395 |
12.94 |
| 2026-10-09 12:00 |
18:02:11.23 |
+17:11:50.4 |
HIP 88395 |
12.80 |
| 2026-10-10 00:00 |
18:02:12.74 |
+17:11:17.1 |
HIP 88395 |
12.69 |
| 2026-10-10 12:00 |
18:02:14.28 |
+17:10:43.9 |
HIP 88395 |
12.60 |
| 2026-10-11 00:00 |
18:02:15.85 |
+17:10:10.8 |
HIP 88395 |
12.55 |