メタデータ
| 項目 |
値 |
| Designation |
C/2008 R3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-11-22T11:49:46.845120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:23Z |
| Obs used |
517 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
8.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-11-02.0000000 |
| e |
0.89635151 |
| q (au) |
1.909016 |
| a (au) |
18.418176 |
| i (deg) |
43.237853 |
| Ω (om, deg) |
270.553144 |
| ω (w, deg) |
84.160425 |
| M (ma, deg) |
359.744473 |
等級
散乱 + 全体線形
$$
M_a = (12.812 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.812 |
| n |
6.000 |
| 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) |
| 2026-07-29 00:00 |
09:20:21.79 |
-25:38:22.6 |
HIP 45793 |
1.90 |
| 2026-07-29 12:00 |
09:20:26.31 |
-25:38:31.5 |
HIP 45793 |
2.91 |
| 2026-07-30 00:00 |
09:20:30.84 |
-25:38:40.7 |
HIP 45793 |
3.93 |
| 2026-07-30 12:00 |
09:20:35.38 |
-25:38:50.4 |
HIP 45793 |
4.96 |
| 2026-07-31 00:00 |
09:20:39.92 |
-25:39:00.3 |
HIP 45793 |
6.00 |
| 2026-07-31 12:00 |
09:20:44.47 |
-25:39:10.6 |
HIP 45793 |
7.04 |
| 2026-08-01 00:00 |
09:20:49.02 |
-25:39:21.3 |
HIP 45793 |
8.08 |
| 2026-08-01 12:00 |
09:20:53.58 |
-25:39:32.3 |
HIP 45793 |
9.12 |
| 2026-08-02 00:00 |
09:20:58.14 |
-25:39:43.6 |
HIP 45793 |
10.16 |
| 2026-08-02 12:00 |
09:21:02.71 |
-25:39:55.3 |
HIP 45793 |
11.21 |
| 2026-08-03 00:00 |
09:21:07.28 |
-25:40:07.4 |
HIP 45793 |
12.26 |
| 2026-08-03 12:00 |
09:21:11.86 |
-25:40:19.7 |
HIP 45793 |
13.31 |
| 2026-08-04 00:00 |
09:21:16.44 |
-25:40:32.5 |
HIP 45793 |
14.37 |
| 2026-08-04 12:00 |
09:21:21.02 |
-25:40:45.6 |
HIP 45793 |
15.42 |
| 2026-08-05 00:00 |
09:21:25.61 |
-25:40:59.0 |
HIP 45793 |
16.48 |
| 2026-08-05 12:00 |
09:21:30.20 |
-25:41:12.7 |
HIP 45902 |
16.71 |
| 2026-08-06 00:00 |
09:21:34.79 |
-25:41:26.9 |
HIP 45902 |
16.52 |
| 2026-08-06 12:00 |
09:21:39.39 |
-25:41:41.3 |
HIP 45902 |
16.39 |
| 2026-08-07 00:00 |
09:21:43.99 |
-25:41:56.1 |
HIP 45902 |
16.31 |
| 2026-08-07 12:00 |
09:21:48.59 |
-25:42:11.2 |
HIP 45902 |
16.31 |
| 2026-08-08 00:00 |
09:21:53.19 |
-25:42:26.7 |
HIP 45902 |
16.36 |
| 2026-08-08 12:00 |
09:21:57.79 |
-25:42:42.5 |
HIP 45902 |
16.49 |
| 2026-08-09 00:00 |
09:22:02.39 |
-25:42:58.7 |
HIP 45902 |
16.67 |
| 2026-08-09 12:00 |
09:22:07.00 |
-25:43:15.2 |
HIP 45902 |
16.91 |
| 2026-08-10 00:00 |
09:22:11.60 |
-25:43:32.0 |
HIP 45902 |
17.22 |
| 2026-08-10 12:00 |
09:22:16.21 |
-25:43:49.2 |
HIP 45902 |
17.58 |
| 2026-08-11 00:00 |
09:22:20.82 |
-25:44:06.7 |
HIP 45902 |
17.99 |
| 2026-08-11 12:00 |
09:22:25.42 |
-25:44:24.6 |
HIP 45902 |
18.45 |
| 2026-08-12 00:00 |
09:22:30.03 |
-25:44:42.7 |
HIP 45902 |
18.96 |
| 2026-08-12 12:00 |
09:22:34.63 |
-25:45:01.3 |
HIP 45902 |
19.51 |
| 2026-08-13 00:00 |
09:22:39.23 |
-25:45:20.1 |
HIP 45902 |
20.10 |
| 2026-08-13 12:00 |
09:22:43.84 |
-25:45:39.3 |
HIP 45902 |
20.72 |
| 2026-08-14 00:00 |
09:22:48.43 |
-25:45:58.8 |
HIP 45902 |
21.38 |
| 2026-08-14 12:00 |
09:22:53.03 |
-25:46:18.7 |
HIP 45902 |
22.07 |
| 2026-08-15 00:00 |
09:22:57.63 |
-25:46:38.8 |
HIP 45902 |
22.79 |
| 2026-08-15 12:00 |
09:23:02.22 |
-25:46:59.3 |
HIP 46037 |
23.40 |
| 2026-08-16 00:00 |
09:23:06.81 |
-25:47:20.1 |
HIP 46037 |
22.88 |
| 2026-08-16 12:00 |
09:23:11.39 |
-25:47:41.3 |
HIP 46037 |
22.39 |
| 2026-08-17 00:00 |
09:23:15.98 |
-25:48:02.8 |
HIP 46037 |
21.94 |
| 2026-08-17 12:00 |
09:23:20.56 |
-25:48:24.5 |
HIP 46037 |
21.54 |
| 2026-08-18 00:00 |
09:23:25.13 |
-25:48:46.7 |
HIP 46037 |
21.17 |
| 2026-08-18 12:00 |
09:23:29.70 |
-25:49:09.1 |
HIP 46037 |
20.85 |
| 2026-08-19 00:00 |
09:23:34.27 |
-25:49:31.8 |
HIP 46037 |
20.58 |