C/2002 Q2 (LINEAR)
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) |
| 2026-02-03 00:00 |
08:36:57.18 |
-59:04:31.8 |
HIP 42100 |
23.22 |
| 2026-02-03 12:00 |
08:36:51.79 |
-59:04:22.7 |
HIP 42100 |
22.63 |
| 2026-02-04 00:00 |
08:36:46.40 |
-59:04:13.2 |
HIP 42100 |
22.05 |
| 2026-02-04 12:00 |
08:36:41.02 |
-59:04:03.3 |
HIP 42100 |
21.47 |
| 2026-02-05 00:00 |
08:36:35.65 |
-59:03:53.1 |
HIP 42100 |
20.89 |
| 2026-02-05 12:00 |
08:36:30.28 |
-59:03:42.5 |
HIP 42100 |
20.32 |
| 2026-02-06 00:00 |
08:36:24.92 |
-59:03:31.5 |
HIP 42100 |
19.75 |
| 2026-02-06 12:00 |
08:36:19.58 |
-59:03:20.1 |
HIP 42100 |
19.19 |
| 2026-02-07 00:00 |
08:36:14.24 |
-59:03:08.3 |
HIP 42100 |
18.63 |
| 2026-02-07 12:00 |
08:36:08.91 |
-59:02:56.2 |
HIP 42100 |
18.08 |
| 2026-02-08 00:00 |
08:36:03.60 |
-59:02:43.7 |
HIP 42100 |
17.54 |
| 2026-02-08 12:00 |
08:35:58.29 |
-59:02:30.8 |
HIP 42100 |
17.01 |
| 2026-02-09 00:00 |
08:35:53.00 |
-59:02:17.5 |
HIP 42100 |
16.48 |
| 2026-02-09 12:00 |
08:35:47.71 |
-59:02:03.9 |
HIP 42100 |
15.97 |
| 2026-02-10 00:00 |
08:35:42.44 |
-59:01:49.8 |
HIP 42100 |
15.47 |
| 2026-02-10 12:00 |
08:35:37.19 |
-59:01:35.4 |
HIP 42100 |
14.98 |
| 2026-02-11 00:00 |
08:35:31.94 |
-59:01:20.7 |
HIP 42100 |
14.50 |
| 2026-02-11 12:00 |
08:35:26.71 |
-59:01:05.5 |
HIP 42100 |
14.04 |
| 2026-02-12 00:00 |
08:35:21.50 |
-59:00:50.0 |
HIP 42100 |
13.59 |
| 2026-02-12 12:00 |
08:35:16.30 |
-59:00:34.2 |
HIP 42100 |
13.17 |
| 2026-02-13 00:00 |
08:35:11.11 |
-59:00:17.9 |
HIP 42100 |
12.76 |
| 2026-02-13 12:00 |
08:35:05.94 |
-59:00:01.3 |
HIP 42100 |
12.38 |
| 2026-02-14 00:00 |
08:35:00.79 |
-58:59:44.3 |
HIP 42100 |
12.03 |
| 2026-02-14 12:00 |
08:34:55.65 |
-58:59:27.0 |
HIP 42100 |
11.70 |
| 2026-02-15 00:00 |
08:34:50.53 |
-58:59:09.3 |
HIP 42100 |
11.40 |
| 2026-02-15 12:00 |
08:34:45.43 |
-58:58:51.2 |
HIP 42100 |
11.14 |
| 2026-02-16 00:00 |
08:34:40.34 |
-58:58:32.8 |
HIP 42100 |
10.91 |
| 2026-02-16 12:00 |
08:34:35.28 |
-58:58:14.0 |
HIP 42100 |
10.72 |
| 2026-02-17 00:00 |
08:34:30.23 |
-58:57:54.9 |
HIP 42100 |
10.56 |
| 2026-02-17 12:00 |
08:34:25.21 |
-58:57:35.4 |
HIP 42100 |
10.45 |
| 2026-02-18 00:00 |
08:34:20.20 |
-58:57:15.6 |
HIP 42100 |
10.39 |
| 2026-02-18 12:00 |
08:34:15.21 |
-58:56:55.4 |
HIP 42100 |
10.37 |
| 2026-02-19 00:00 |
08:34:10.25 |
-58:56:34.8 |
HIP 42100 |
10.39 |
| 2026-02-19 12:00 |
08:34:05.30 |
-58:56:14.0 |
HIP 42100 |
10.46 |
| 2026-02-20 00:00 |
08:34:00.38 |
-58:55:52.7 |
HIP 42100 |
10.57 |
| 2026-02-20 12:00 |
08:33:55.48 |
-58:55:31.1 |
HIP 42100 |
10.72 |
| 2026-02-21 00:00 |
08:33:50.60 |
-58:55:09.2 |
HIP 42100 |
10.92 |
| 2026-02-21 12:00 |
08:33:45.74 |
-58:54:47.0 |
HIP 42100 |
11.15 |
| 2026-02-22 00:00 |
08:33:40.91 |
-58:54:24.4 |
HIP 42100 |
11.42 |
| 2026-02-22 12:00 |
08:33:36.10 |
-58:54:01.4 |
HIP 42100 |
11.72 |
| 2026-02-23 00:00 |
08:33:31.32 |
-58:53:38.2 |
HIP 42100 |
12.06 |
| 2026-02-23 12:00 |
08:33:26.56 |
-58:53:14.6 |
HIP 42100 |
12.42 |
| 2026-02-24 00:00 |
08:33:21.83 |
-58:52:50.7 |
HIP 42100 |
12.81 |