メタデータ
| 項目 |
値 |
| Designation |
C/2002 Q2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-08-17T18:46:31.782720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:19Z |
| Obs used |
166 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-09-04.0000000 |
| e |
0.97789208 |
| q (au) |
1.303022 |
| a (au) |
58.939134 |
| i (deg) |
96.765213 |
| Ω (om, deg) |
154.285005 |
| ω (w, deg) |
125.472100 |
| M (ma, deg) |
0.037504 |
等級
散乱 + 全体線形
$$
M_a = (16.983 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.983 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
08:30:12.19 |
-56:49:06.9 |
HIP 41864 |
19.75 |
| 2026-06-01 12:00 |
08:30:15.16 |
-56:48:33.3 |
HIP 41864 |
19.10 |
| 2026-06-02 00:00 |
08:30:18.16 |
-56:47:59.8 |
HIP 41864 |
18.45 |
| 2026-06-02 12:00 |
08:30:21.19 |
-56:47:26.6 |
HIP 41864 |
17.80 |
| 2026-06-03 00:00 |
08:30:24.25 |
-56:46:53.6 |
HIP 41864 |
17.16 |
| 2026-06-03 12:00 |
08:30:27.35 |
-56:46:20.8 |
HIP 41864 |
16.52 |
| 2026-06-04 00:00 |
08:30:30.47 |
-56:45:48.3 |
HIP 41864 |
15.88 |
| 2026-06-04 12:00 |
08:30:33.63 |
-56:45:15.9 |
HIP 41864 |
15.24 |
| 2026-06-05 00:00 |
08:30:36.82 |
-56:44:43.9 |
HIP 41864 |
14.60 |
| 2026-06-05 12:00 |
08:30:40.04 |
-56:44:12.0 |
HIP 41864 |
13.97 |
| 2026-06-06 00:00 |
08:30:43.29 |
-56:43:40.4 |
HIP 41864 |
13.34 |
| 2026-06-06 12:00 |
08:30:46.57 |
-56:43:09.0 |
HIP 41864 |
12.72 |
| 2026-06-07 00:00 |
08:30:49.88 |
-56:42:37.9 |
HIP 41864 |
12.10 |
| 2026-06-07 12:00 |
08:30:53.22 |
-56:42:07.0 |
HIP 41864 |
11.48 |
| 2026-06-08 00:00 |
08:30:56.59 |
-56:41:36.3 |
HIP 41864 |
10.87 |
| 2026-06-08 12:00 |
08:31:00.00 |
-56:41:05.9 |
HIP 41864 |
10.27 |
| 2026-06-09 00:00 |
08:31:03.42 |
-56:40:35.7 |
HIP 41864 |
9.68 |
| 2026-06-09 12:00 |
08:31:06.88 |
-56:40:05.8 |
HIP 41864 |
9.10 |
| 2026-06-10 00:00 |
08:31:10.37 |
-56:39:36.2 |
HIP 41864 |
8.53 |
| 2026-06-10 12:00 |
08:31:13.88 |
-56:39:06.8 |
HIP 41864 |
7.97 |
| 2026-06-11 00:00 |
08:31:17.43 |
-56:38:37.6 |
HIP 41864 |
7.44 |
| 2026-06-11 12:00 |
08:31:21.00 |
-56:38:08.7 |
HIP 41864 |
6.93 |
| 2026-06-12 00:00 |
08:31:24.60 |
-56:37:40.1 |
HIP 41864 |
6.44 |
| 2026-06-12 12:00 |
08:31:28.23 |
-56:37:11.7 |
HIP 41864 |
5.99 |
| 2026-06-13 00:00 |
08:31:31.88 |
-56:36:43.6 |
HIP 41864 |
5.59 |
| 2026-06-13 12:00 |
08:31:35.56 |
-56:36:15.7 |
HIP 41864 |
5.23 |
| 2026-06-14 00:00 |
08:31:39.27 |
-56:35:48.2 |
HIP 41864 |
4.95 |
| 2026-06-14 12:00 |
08:31:43.01 |
-56:35:20.9 |
HIP 41864 |
4.74 |
| 2026-06-15 00:00 |
08:31:46.77 |
-56:34:53.8 |
HIP 41864 |
4.62 |
| 2026-06-15 12:00 |
08:31:50.56 |
-56:34:27.0 |
HIP 41864 |
4.59 |
| 2026-06-16 00:00 |
08:31:54.37 |
-56:34:00.5 |
HIP 41864 |
4.66 |
| 2026-06-16 12:00 |
08:31:58.21 |
-56:33:34.3 |
HIP 41864 |
4.82 |
| 2026-06-17 00:00 |
08:32:02.07 |
-56:33:08.4 |
HIP 41864 |
5.06 |
| 2026-06-17 12:00 |
08:32:05.96 |
-56:32:42.7 |
HIP 41864 |
5.38 |
| 2026-06-18 00:00 |
08:32:09.87 |
-56:32:17.3 |
HIP 41864 |
5.75 |
| 2026-06-18 12:00 |
08:32:13.81 |
-56:31:52.2 |
HIP 41864 |
6.18 |
| 2026-06-19 00:00 |
08:32:17.77 |
-56:31:27.4 |
HIP 41864 |
6.64 |
| 2026-06-19 12:00 |
08:32:21.75 |
-56:31:02.8 |
HIP 41864 |
7.13 |
| 2026-06-20 00:00 |
08:32:25.76 |
-56:30:38.6 |
HIP 41864 |
7.66 |
| 2026-06-20 12:00 |
08:32:29.79 |
-56:30:14.6 |
HIP 41954 |
8.12 |
| 2026-06-21 00:00 |
08:32:33.84 |
-56:29:50.9 |
HIP 41954 |
7.47 |
| 2026-06-21 12:00 |
08:32:37.92 |
-56:29:27.5 |
HIP 41954 |
6.83 |
| 2026-06-22 00:00 |
08:32:42.02 |
-56:29:04.4 |
HIP 41954 |
6.20 |