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) |
| 2026-03-26 00:00 |
06:17:38.17 |
-04:29:17.3 |
HIP 29917 |
7.37 |
| 2026-03-26 12:00 |
06:17:38.11 |
-04:28:58.4 |
HIP 29917 |
7.11 |
| 2026-03-27 00:00 |
06:17:38.07 |
-04:28:39.5 |
HIP 29917 |
6.86 |
| 2026-03-27 12:00 |
06:17:38.05 |
-04:28:20.7 |
HIP 29917 |
6.60 |
| 2026-03-28 00:00 |
06:17:38.06 |
-04:28:01.9 |
HIP 29917 |
6.35 |
| 2026-03-28 12:00 |
06:17:38.08 |
-04:27:43.1 |
HIP 29917 |
6.09 |
| 2026-03-29 00:00 |
06:17:38.13 |
-04:27:24.4 |
HIP 29917 |
5.84 |
| 2026-03-29 12:00 |
06:17:38.21 |
-04:27:05.6 |
HIP 29917 |
5.60 |
| 2026-03-30 00:00 |
06:17:38.30 |
-04:26:46.9 |
HIP 29917 |
5.36 |
| 2026-03-30 12:00 |
06:17:38.42 |
-04:26:28.3 |
HIP 29917 |
5.12 |
| 2026-03-31 00:00 |
06:17:38.56 |
-04:26:09.6 |
HIP 29917 |
4.88 |
| 2026-03-31 12:00 |
06:17:38.72 |
-04:25:51.0 |
HIP 29917 |
4.65 |
| 2026-04-01 00:00 |
06:17:38.91 |
-04:25:32.5 |
HIP 29917 |
4.43 |
| 2026-04-01 12:00 |
06:17:39.11 |
-04:25:13.9 |
HIP 29917 |
4.21 |
| 2026-04-02 00:00 |
06:17:39.34 |
-04:24:55.4 |
HIP 29917 |
4.00 |
| 2026-04-02 12:00 |
06:17:39.60 |
-04:24:37.0 |
HIP 29917 |
3.81 |
| 2026-04-03 00:00 |
06:17:39.87 |
-04:24:18.6 |
HIP 29917 |
3.62 |
| 2026-04-03 12:00 |
06:17:40.17 |
-04:24:00.2 |
HIP 29917 |
3.45 |
| 2026-04-04 00:00 |
06:17:40.48 |
-04:23:41.8 |
HIP 29917 |
3.29 |
| 2026-04-04 12:00 |
06:17:40.82 |
-04:23:23.6 |
HIP 29917 |
3.15 |
| 2026-04-05 00:00 |
06:17:41.19 |
-04:23:05.3 |
HIP 29917 |
3.03 |
| 2026-04-05 12:00 |
06:17:41.57 |
-04:22:47.1 |
HIP 29917 |
2.94 |
| 2026-04-06 00:00 |
06:17:41.98 |
-04:22:29.0 |
HIP 29917 |
2.87 |
| 2026-04-06 12:00 |
06:17:42.41 |
-04:22:10.8 |
HIP 29917 |
2.83 |
| 2026-04-07 00:00 |
06:17:42.86 |
-04:21:52.8 |
HIP 29917 |
2.83 |
| 2026-04-07 12:00 |
06:17:43.33 |
-04:21:34.8 |
HIP 29917 |
2.85 |
| 2026-04-08 00:00 |
06:17:43.82 |
-04:21:16.8 |
HIP 29917 |
2.90 |
| 2026-04-08 12:00 |
06:17:44.34 |
-04:20:58.9 |
HIP 29917 |
2.99 |
| 2026-04-09 00:00 |
06:17:44.87 |
-04:20:41.1 |
HIP 29917 |
3.10 |
| 2026-04-09 12:00 |
06:17:45.43 |
-04:20:23.3 |
HIP 29917 |
3.24 |
| 2026-04-10 00:00 |
06:17:46.01 |
-04:20:05.5 |
HIP 29917 |
3.40 |
| 2026-04-10 12:00 |
06:17:46.61 |
-04:19:47.8 |
HIP 29917 |
3.58 |
| 2026-04-11 00:00 |
06:17:47.23 |
-04:19:30.2 |
HIP 29917 |
3.77 |
| 2026-04-11 12:00 |
06:17:47.88 |
-04:19:12.7 |
HIP 29917 |
3.98 |
| 2026-04-12 00:00 |
06:17:48.54 |
-04:18:55.2 |
HIP 29917 |
4.21 |
| 2026-04-12 12:00 |
06:17:49.23 |
-04:18:37.7 |
HIP 29917 |
4.45 |
| 2026-04-13 00:00 |
06:17:49.94 |
-04:18:20.3 |
HIP 29917 |
4.69 |
| 2026-04-13 12:00 |
06:17:50.66 |
-04:18:03.0 |
HIP 29917 |
4.95 |
| 2026-04-14 00:00 |
06:17:51.41 |
-04:17:45.8 |
HIP 29917 |
5.21 |
| 2026-04-14 12:00 |
06:17:52.18 |
-04:17:28.6 |
HIP 29917 |
5.49 |
| 2026-04-15 00:00 |
06:17:52.97 |
-04:17:11.5 |
HIP 29917 |
5.76 |
| 2026-04-15 12:00 |
06:17:53.79 |
-04:16:54.5 |
HIP 29917 |
6.05 |
| 2026-04-16 00:00 |
06:17:54.62 |
-04:16:37.5 |
HIP 29917 |
6.34 |