メタデータ
| 項目 |
値 |
| Designation |
C/2007 D3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-27T16:50:25.203840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:04Z |
| Obs used |
177 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
8.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-11-28.0000000 |
| e |
0.99201293 |
| q (au) |
5.208969 |
| a (au) |
652.174844 |
| i (deg) |
45.920258 |
| Ω (om, deg) |
148.429528 |
| ω (w, deg) |
309.094137 |
| M (ma, deg) |
0.010906 |
等級
散乱 + 全体線形
$$
M_a = (8.625 + 3.167\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.625 |
| n |
3.167 |
| gf |
1.000 |
| gb |
-0.948 |
| 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) |
| 2026-09-20 00:00 |
15:55:43.79 |
+25:48:18.5 |
HIP 77965 |
13.25 |
| 2026-09-20 12:00 |
15:55:45.73 |
+25:47:43.2 |
HIP 77965 |
13.96 |
| 2026-09-21 00:00 |
15:55:47.69 |
+25:47:08.0 |
HIP 77965 |
14.67 |
| 2026-09-21 12:00 |
15:55:49.68 |
+25:46:32.9 |
HIP 77965 |
15.39 |
| 2026-09-22 00:00 |
15:55:51.69 |
+25:45:57.9 |
HIP 77965 |
16.11 |
| 2026-09-22 12:00 |
15:55:53.73 |
+25:45:23.0 |
HIP 77965 |
16.83 |
| 2026-09-23 00:00 |
15:55:55.80 |
+25:44:48.1 |
HIP 77965 |
17.56 |
| 2026-09-23 12:00 |
15:55:57.89 |
+25:44:13.4 |
HIP 77965 |
18.29 |
| 2026-09-24 00:00 |
15:56:00.00 |
+25:43:38.8 |
HIP 77965 |
19.02 |
| 2026-09-24 12:00 |
15:56:02.14 |
+25:43:04.4 |
HIP 77965 |
19.75 |
| 2026-09-25 00:00 |
15:56:04.31 |
+25:42:30.0 |
HIP 77965 |
20.48 |
| 2026-09-25 12:00 |
15:56:06.50 |
+25:41:55.7 |
HIP 77965 |
21.22 |
| 2026-09-26 00:00 |
15:56:08.72 |
+25:41:21.5 |
HIP 77965 |
21.96 |
| 2026-09-26 12:00 |
15:56:10.95 |
+25:40:47.5 |
HIP 77965 |
22.70 |
| 2026-09-27 00:00 |
15:56:13.22 |
+25:40:13.6 |
HIP 77965 |
23.45 |
| 2026-09-27 12:00 |
15:56:15.51 |
+25:39:39.8 |
HIP 77965 |
24.19 |
| 2026-09-28 00:00 |
15:56:17.82 |
+25:39:06.1 |
HIP 77965 |
24.94 |
| 2026-09-28 12:00 |
15:56:20.16 |
+25:38:32.5 |
HIP 77965 |
25.69 |
| 2026-09-29 00:00 |
15:56:22.52 |
+25:37:59.1 |
HIP 77965 |
26.44 |
| 2026-09-29 12:00 |
15:56:24.90 |
+25:37:25.8 |
HIP 78069 |
26.87 |
| 2026-09-30 00:00 |
15:56:27.31 |
+25:36:52.6 |
HIP 78069 |
26.33 |
| 2026-09-30 12:00 |
15:56:29.74 |
+25:36:19.6 |
HIP 78069 |
25.79 |
| 2026-10-01 00:00 |
15:56:32.20 |
+25:35:46.6 |
HIP 78069 |
25.28 |
| 2026-10-01 12:00 |
15:56:34.68 |
+25:35:13.9 |
HIP 78069 |
24.77 |
| 2026-10-02 00:00 |
15:56:37.18 |
+25:34:41.2 |
HIP 78069 |
24.29 |
| 2026-10-02 12:00 |
15:56:39.70 |
+25:34:08.7 |
HIP 78069 |
23.83 |
| 2026-10-03 00:00 |
15:56:42.25 |
+25:33:36.4 |
HIP 78069 |
23.38 |
| 2026-10-03 12:00 |
15:56:44.82 |
+25:33:04.2 |
HIP 78069 |
22.96 |
| 2026-10-04 00:00 |
15:56:47.42 |
+25:32:32.1 |
HIP 78069 |
22.56 |
| 2026-10-04 12:00 |
15:56:50.03 |
+25:32:00.2 |
HIP 78069 |
22.19 |
| 2026-10-05 00:00 |
15:56:52.67 |
+25:31:28.4 |
HIP 78069 |
21.84 |
| 2026-10-05 12:00 |
15:56:55.33 |
+25:30:56.8 |
HIP 78069 |
21.53 |
| 2026-10-06 00:00 |
15:56:58.01 |
+25:30:25.4 |
HIP 78069 |
21.24 |
| 2026-10-06 12:00 |
15:57:00.72 |
+25:29:54.1 |
HIP 78069 |
20.98 |
| 2026-10-07 00:00 |
15:57:03.44 |
+25:29:23.0 |
HIP 78069 |
20.75 |
| 2026-10-07 12:00 |
15:57:06.19 |
+25:28:52.0 |
HIP 78069 |
20.56 |
| 2026-10-08 00:00 |
15:57:08.96 |
+25:28:21.2 |
HIP 78069 |
20.40 |
| 2026-10-08 12:00 |
15:57:11.75 |
+25:27:50.6 |
HIP 78069 |
20.28 |
| 2026-10-09 00:00 |
15:57:14.56 |
+25:27:20.1 |
HIP 78069 |
20.20 |
| 2026-10-09 12:00 |
15:57:17.39 |
+25:26:49.8 |
HIP 78069 |
20.15 |
| 2026-10-10 00:00 |
15:57:20.24 |
+25:26:19.7 |
HIP 78069 |
20.14 |
| 2026-10-10 12:00 |
15:57:23.12 |
+25:25:49.7 |
HIP 78259 |
20.07 |
| 2026-10-11 00:00 |
15:57:26.01 |
+25:25:20.0 |
HIP 78259 |
19.70 |