メタデータ
| 項目 |
値 |
| Designation |
C/2002 A3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-24T16:39:20.770560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:13Z |
| Obs used |
284 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
10.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-08-09.0000000 |
| e |
1.00944709 |
| q (au) |
5.151609 |
| a (au) |
-545.311986 |
| i (deg) |
48.082650 |
| Ω (om, deg) |
136.526383 |
| ω (w, deg) |
329.528821 |
| M (ma, deg) |
0.008228 |
等級
散乱 + 全体線形
$$
M_a = (2.473 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.473 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
17:19:19.62 |
+22:36:59.1 |
HIP 84555 |
35.14 |
| 2026-05-12 12:00 |
17:19:17.12 |
+22:37:14.9 |
HIP 84555 |
34.76 |
| 2026-05-13 00:00 |
17:19:14.60 |
+22:37:30.6 |
HIP 84555 |
34.38 |
| 2026-05-13 12:00 |
17:19:12.07 |
+22:37:46.0 |
HIP 84555 |
34.00 |
| 2026-05-14 00:00 |
17:19:09.52 |
+22:38:01.1 |
HIP 84555 |
33.62 |
| 2026-05-14 12:00 |
17:19:06.96 |
+22:38:16.1 |
HIP 84555 |
33.25 |
| 2026-05-15 00:00 |
17:19:04.39 |
+22:38:30.8 |
HIP 84555 |
32.88 |
| 2026-05-15 12:00 |
17:19:01.81 |
+22:38:45.3 |
HIP 84555 |
32.52 |
| 2026-05-16 00:00 |
17:18:59.21 |
+22:38:59.6 |
HIP 84555 |
32.16 |
| 2026-05-16 12:00 |
17:18:56.61 |
+22:39:13.6 |
HIP 84555 |
31.80 |
| 2026-05-17 00:00 |
17:18:53.99 |
+22:39:27.4 |
HIP 84555 |
31.45 |
| 2026-05-17 12:00 |
17:18:51.36 |
+22:39:40.9 |
HIP 84599 |
31.08 |
| 2026-05-18 00:00 |
17:18:48.71 |
+22:39:54.2 |
HIP 84599 |
30.56 |
| 2026-05-18 12:00 |
17:18:46.06 |
+22:40:07.3 |
HIP 84599 |
30.04 |
| 2026-05-19 00:00 |
17:18:43.40 |
+22:40:20.1 |
HIP 84599 |
29.53 |
| 2026-05-19 12:00 |
17:18:40.72 |
+22:40:32.7 |
HIP 84599 |
29.03 |
| 2026-05-20 00:00 |
17:18:38.04 |
+22:40:45.0 |
HIP 84599 |
28.54 |
| 2026-05-20 12:00 |
17:18:35.35 |
+22:40:57.1 |
HIP 84599 |
28.06 |
| 2026-05-21 00:00 |
17:18:32.64 |
+22:41:09.0 |
HIP 84599 |
27.59 |
| 2026-05-21 12:00 |
17:18:29.93 |
+22:41:20.6 |
HIP 84599 |
27.12 |
| 2026-05-22 00:00 |
17:18:27.21 |
+22:41:32.0 |
HIP 84599 |
26.67 |
| 2026-05-22 12:00 |
17:18:24.47 |
+22:41:43.1 |
HIP 84599 |
26.23 |
| 2026-05-23 00:00 |
17:18:21.73 |
+22:41:53.9 |
HIP 84599 |
25.80 |
| 2026-05-23 12:00 |
17:18:18.98 |
+22:42:04.6 |
HIP 84599 |
25.39 |
| 2026-05-24 00:00 |
17:18:16.22 |
+22:42:14.9 |
HIP 84599 |
24.98 |
| 2026-05-24 12:00 |
17:18:13.46 |
+22:42:25.0 |
HIP 84599 |
24.60 |
| 2026-05-25 00:00 |
17:18:10.68 |
+22:42:34.9 |
HIP 84599 |
24.22 |
| 2026-05-25 12:00 |
17:18:07.90 |
+22:42:44.5 |
HIP 84599 |
23.87 |
| 2026-05-26 00:00 |
17:18:05.11 |
+22:42:53.9 |
HIP 84599 |
23.53 |
| 2026-05-26 12:00 |
17:18:02.32 |
+22:43:03.0 |
HIP 84599 |
23.20 |
| 2026-05-27 00:00 |
17:17:59.51 |
+22:43:11.9 |
HIP 84599 |
22.90 |
| 2026-05-27 12:00 |
17:17:56.70 |
+22:43:20.5 |
HIP 84599 |
22.61 |
| 2026-05-28 00:00 |
17:17:53.89 |
+22:43:28.8 |
HIP 84599 |
22.35 |
| 2026-05-28 12:00 |
17:17:51.06 |
+22:43:36.9 |
HIP 84599 |
22.10 |
| 2026-05-29 00:00 |
17:17:48.24 |
+22:43:44.8 |
HIP 84599 |
21.88 |
| 2026-05-29 12:00 |
17:17:45.40 |
+22:43:52.3 |
HIP 84599 |
21.68 |
| 2026-05-30 00:00 |
17:17:42.56 |
+22:43:59.7 |
HIP 84599 |
21.50 |
| 2026-05-30 12:00 |
17:17:39.71 |
+22:44:06.7 |
HIP 84599 |
21.34 |
| 2026-05-31 00:00 |
17:17:36.86 |
+22:44:13.5 |
HIP 84599 |
21.21 |
| 2026-05-31 12:00 |
17:17:34.01 |
+22:44:20.1 |
HIP 84599 |
21.11 |
| 2026-06-01 00:00 |
17:17:31.15 |
+22:44:26.4 |
HIP 84599 |
21.03 |
| 2026-06-01 12:00 |
17:17:28.28 |
+22:44:32.4 |
HIP 84599 |
20.97 |
| 2026-06-02 00:00 |
17:17:25.41 |
+22:44:38.2 |
HIP 84599 |
20.94 |