メタデータ
| 項目 |
値 |
| Designation |
C/2002 Q5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-11-19T04:48:24.062400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:20Z |
| Obs used |
571 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
5.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-10-27.0000000 |
| e |
1.00157521 |
| q (au) |
1.242967 |
| a (au) |
-789.082357 |
| i (deg) |
149.164230 |
| Ω (om, deg) |
33.747198 |
| ω (w, deg) |
133.306477 |
| M (ma, deg) |
-0.001032 |
等級
散乱 + 全体線形
$$
M_a = (11.974 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.974 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.951 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2002-08-28 |
2002-09-29 |
+21.0620 |
-4.420 |
| 2002-09-29 |
2002-11-04 |
-4.0688 |
-0.380 |
| 2002-12-25 |
2003-02-28 |
+2.5644 |
-3.204 |
| 2003-02-28 |
2003-05-30 |
-0.0497 |
-0.829 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:20:24.18 |
-03:57:47.2 |
HIP 30026 |
23.36 |
| 2026-06-01 12:00 |
06:20:26.41 |
-03:57:40.7 |
HIP 30026 |
23.76 |
| 2026-06-02 00:00 |
06:20:28.64 |
-03:57:34.3 |
HIP 30026 |
24.17 |
| 2026-06-02 12:00 |
06:20:30.88 |
-03:57:28.0 |
HIP 30026 |
24.60 |
| 2026-06-03 00:00 |
06:20:33.13 |
-03:57:21.9 |
HIP 30026 |
25.03 |
| 2026-06-03 12:00 |
06:20:35.39 |
-03:57:15.9 |
HIP 30197 |
25.33 |
| 2026-06-04 00:00 |
06:20:37.66 |
-03:57:10.1 |
HIP 30197 |
25.23 |
| 2026-06-04 12:00 |
06:20:39.93 |
-03:57:04.4 |
HIP 30197 |
25.14 |
| 2026-06-05 00:00 |
06:20:42.21 |
-03:56:58.8 |
HIP 30197 |
25.06 |
| 2026-06-05 12:00 |
06:20:44.50 |
-03:56:53.4 |
HIP 30197 |
24.99 |
| 2026-06-06 00:00 |
06:20:46.79 |
-03:56:48.2 |
HIP 30197 |
24.93 |
| 2026-06-06 12:00 |
06:20:49.09 |
-03:56:43.0 |
HIP 30197 |
24.88 |
| 2026-06-07 00:00 |
06:20:51.40 |
-03:56:38.1 |
HIP 30197 |
24.85 |
| 2026-06-07 12:00 |
06:20:53.71 |
-03:56:33.2 |
HIP 30197 |
24.82 |
| 2026-06-08 00:00 |
06:20:56.04 |
-03:56:28.5 |
HIP 30197 |
24.80 |
| 2026-06-08 12:00 |
06:20:58.36 |
-03:56:24.0 |
HIP 30197 |
24.80 |
| 2026-06-09 00:00 |
06:21:00.70 |
-03:56:19.6 |
HIP 30197 |
24.81 |
| 2026-06-09 12:00 |
06:21:03.04 |
-03:56:15.3 |
HIP 30197 |
24.82 |
| 2026-06-10 00:00 |
06:21:05.38 |
-03:56:11.2 |
HIP 30197 |
24.85 |
| 2026-06-10 12:00 |
06:21:07.73 |
-03:56:07.2 |
HIP 30197 |
24.89 |
| 2026-06-11 00:00 |
06:21:10.09 |
-03:56:03.4 |
HIP 30197 |
24.95 |
| 2026-06-11 12:00 |
06:21:12.45 |
-03:55:59.7 |
HIP 30197 |
25.01 |
| 2026-06-12 00:00 |
06:21:14.82 |
-03:55:56.2 |
HIP 30197 |
25.09 |
| 2026-06-12 12:00 |
06:21:17.19 |
-03:55:52.8 |
HIP 30197 |
25.17 |
| 2026-06-13 00:00 |
06:21:19.57 |
-03:55:49.5 |
HIP 30197 |
25.27 |
| 2026-06-13 12:00 |
06:21:21.95 |
-03:55:46.4 |
HIP 30197 |
25.38 |
| 2026-06-14 00:00 |
06:21:24.33 |
-03:55:43.5 |
HIP 30197 |
25.50 |
| 2026-06-14 12:00 |
06:21:26.72 |
-03:55:40.7 |
HIP 30197 |
25.63 |
| 2026-06-15 00:00 |
06:21:29.12 |
-03:55:38.0 |
HIP 30197 |
25.77 |
| 2026-06-15 12:00 |
06:21:31.52 |
-03:55:35.5 |
HIP 30197 |
25.93 |
| 2026-06-16 00:00 |
06:21:33.92 |
-03:55:33.2 |
HIP 30197 |
26.09 |
| 2026-06-16 12:00 |
06:21:36.32 |
-03:55:30.9 |
HIP 30197 |
26.27 |
| 2026-06-17 00:00 |
06:21:38.73 |
-03:55:28.9 |
HIP 30197 |
26.45 |
| 2026-06-17 12:00 |
06:21:41.14 |
-03:55:27.0 |
HIP 30197 |
26.65 |
| 2026-06-18 00:00 |
06:21:43.56 |
-03:55:25.2 |
HIP 30197 |
26.85 |
| 2026-06-18 12:00 |
06:21:45.98 |
-03:55:23.6 |
HIP 30197 |
27.07 |
| 2026-06-19 00:00 |
06:21:48.40 |
-03:55:22.1 |
HIP 30197 |
27.29 |
| 2026-06-19 12:00 |
06:21:50.82 |
-03:55:20.8 |
HIP 30197 |
27.52 |
| 2026-06-20 00:00 |
06:21:53.24 |
-03:55:19.6 |
HIP 30197 |
27.77 |
| 2026-06-20 12:00 |
06:21:55.67 |
-03:55:18.5 |
HIP 30197 |
28.02 |
| 2026-06-21 00:00 |
06:21:58.10 |
-03:55:17.6 |
HIP 30197 |
28.28 |
| 2026-06-21 12:00 |
06:22:00.53 |
-03:55:16.9 |
HIP 30197 |
28.55 |
| 2026-06-22 00:00 |
06:22:02.96 |
-03:55:16.3 |
HIP 30197 |
28.83 |