メタデータ
| 項目 |
値 |
| Designation |
C/2007 Y1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-03-19T08:29:13.778880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:15Z |
| Obs used |
204 |
| NEO |
- |
| M1 |
13.600 |
| 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) |
2008-01-29.0000000 |
| e |
1.00073266 |
| q (au) |
3.340909 |
| a (au) |
-4559.959890 |
| i (deg) |
110.178645 |
| Ω (om, deg) |
133.091647 |
| ω (w, deg) |
357.132366 |
| M (ma, deg) |
-0.000161 |
等級
散乱 + 全体線形
$$
M_a = (15.434 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.434 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.683 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
21:18:03.43 |
+22:13:03.3 |
HIP 105161 |
6.42 |
| 2026-06-01 12:00 |
21:18:02.08 |
+22:13:22.8 |
HIP 105161 |
6.82 |
| 2026-06-02 00:00 |
21:18:00.71 |
+22:13:42.2 |
HIP 105161 |
7.22 |
| 2026-06-02 12:00 |
21:17:59.31 |
+22:14:01.3 |
HIP 105161 |
7.63 |
| 2026-06-03 00:00 |
21:17:57.88 |
+22:14:20.3 |
HIP 105161 |
8.04 |
| 2026-06-03 12:00 |
21:17:56.43 |
+22:14:39.0 |
HIP 105161 |
8.46 |
| 2026-06-04 00:00 |
21:17:54.95 |
+22:14:57.6 |
HIP 105129 |
8.66 |
| 2026-06-04 12:00 |
21:17:53.45 |
+22:15:16.0 |
HIP 105129 |
8.28 |
| 2026-06-05 00:00 |
21:17:51.92 |
+22:15:34.1 |
HIP 105129 |
7.90 |
| 2026-06-05 12:00 |
21:17:50.36 |
+22:15:52.1 |
HIP 105129 |
7.54 |
| 2026-06-06 00:00 |
21:17:48.78 |
+22:16:09.9 |
HIP 105129 |
7.19 |
| 2026-06-06 12:00 |
21:17:47.17 |
+22:16:27.5 |
HIP 105129 |
6.86 |
| 2026-06-07 00:00 |
21:17:45.54 |
+22:16:44.8 |
HIP 105129 |
6.55 |
| 2026-06-07 12:00 |
21:17:43.88 |
+22:17:02.0 |
HIP 105129 |
6.27 |
| 2026-06-08 00:00 |
21:17:42.20 |
+22:17:18.9 |
HIP 105129 |
6.01 |
| 2026-06-08 12:00 |
21:17:40.49 |
+22:17:35.7 |
HIP 105129 |
5.79 |
| 2026-06-09 00:00 |
21:17:38.75 |
+22:17:52.2 |
HIP 105129 |
5.60 |
| 2026-06-09 12:00 |
21:17:36.99 |
+22:18:08.5 |
HIP 105129 |
5.46 |
| 2026-06-10 00:00 |
21:17:35.20 |
+22:18:24.7 |
HIP 105129 |
5.37 |
| 2026-06-10 12:00 |
21:17:33.39 |
+22:18:40.5 |
HIP 105129 |
5.32 |
| 2026-06-11 00:00 |
21:17:31.56 |
+22:18:56.2 |
HIP 105129 |
5.33 |
| 2026-06-11 12:00 |
21:17:29.70 |
+22:19:11.7 |
HIP 105129 |
5.39 |
| 2026-06-12 00:00 |
21:17:27.81 |
+22:19:26.9 |
HIP 105129 |
5.50 |
| 2026-06-12 12:00 |
21:17:25.90 |
+22:19:41.9 |
HIP 105129 |
5.66 |
| 2026-06-13 00:00 |
21:17:23.97 |
+22:19:56.7 |
HIP 105129 |
5.87 |
| 2026-06-13 12:00 |
21:17:22.01 |
+22:20:11.3 |
HIP 105129 |
6.12 |
| 2026-06-14 00:00 |
21:17:20.03 |
+22:20:25.6 |
HIP 105129 |
6.41 |
| 2026-06-14 12:00 |
21:17:18.02 |
+22:20:39.7 |
HIP 105129 |
6.73 |
| 2026-06-15 00:00 |
21:17:15.99 |
+22:20:53.6 |
HIP 105129 |
7.08 |
| 2026-06-15 12:00 |
21:17:13.94 |
+22:21:07.2 |
HIP 105129 |
7.46 |
| 2026-06-16 00:00 |
21:17:11.86 |
+22:21:20.6 |
HIP 105129 |
7.86 |
| 2026-06-16 12:00 |
21:17:09.76 |
+22:21:33.8 |
HIP 105129 |
8.28 |
| 2026-06-17 00:00 |
21:17:07.64 |
+22:21:46.7 |
HIP 105129 |
8.73 |
| 2026-06-17 12:00 |
21:17:05.49 |
+22:21:59.4 |
HIP 105129 |
9.18 |
| 2026-06-18 00:00 |
21:17:03.32 |
+22:22:11.8 |
HIP 105129 |
9.65 |
| 2026-06-18 12:00 |
21:17:01.13 |
+22:22:24.1 |
HIP 105071 |
9.56 |
| 2026-06-19 00:00 |
21:16:58.91 |
+22:22:36.0 |
HIP 105071 |
9.44 |
| 2026-06-19 12:00 |
21:16:56.68 |
+22:22:47.8 |
HIP 105071 |
9.36 |
| 2026-06-20 00:00 |
21:16:54.42 |
+22:22:59.2 |
HIP 105071 |
9.32 |
| 2026-06-20 12:00 |
21:16:52.14 |
+22:23:10.5 |
HIP 105071 |
9.32 |
| 2026-06-21 00:00 |
21:16:49.83 |
+22:23:21.5 |
HIP 105071 |
9.36 |
| 2026-06-21 12:00 |
21:16:47.51 |
+22:23:32.2 |
HIP 105071 |
9.43 |
| 2026-06-22 00:00 |
21:16:45.16 |
+22:23:42.7 |
HIP 105071 |
9.55 |