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) |
| 2026-09-20 00:00 |
09:28:04.74 |
-26:23:38.9 |
HIP 46401 |
5.09 |
| 2026-09-20 12:00 |
09:28:08.43 |
-26:24:18.9 |
HIP 46401 |
6.12 |
| 2026-09-21 00:00 |
09:28:12.11 |
-26:24:59.1 |
HIP 46401 |
7.15 |
| 2026-09-21 12:00 |
09:28:15.76 |
-26:25:39.5 |
HIP 46401 |
8.19 |
| 2026-09-22 00:00 |
09:28:19.39 |
-26:26:20.1 |
HIP 46401 |
9.23 |
| 2026-09-22 12:00 |
09:28:23.00 |
-26:27:00.9 |
HIP 46401 |
10.27 |
| 2026-09-23 00:00 |
09:28:26.58 |
-26:27:41.8 |
HIP 46401 |
11.31 |
| 2026-09-23 12:00 |
09:28:30.14 |
-26:28:23.0 |
HIP 46401 |
12.35 |
| 2026-09-24 00:00 |
09:28:33.68 |
-26:29:04.3 |
HIP 46401 |
13.39 |
| 2026-09-24 12:00 |
09:28:37.19 |
-26:29:45.9 |
HIP 46401 |
14.43 |
| 2026-09-25 00:00 |
09:28:40.68 |
-26:30:27.6 |
HIP 46558 |
14.35 |
| 2026-09-25 12:00 |
09:28:44.15 |
-26:31:09.5 |
HIP 46558 |
13.38 |
| 2026-09-26 00:00 |
09:28:47.59 |
-26:31:51.5 |
HIP 46558 |
12.42 |
| 2026-09-26 12:00 |
09:28:51.01 |
-26:32:33.8 |
HIP 46558 |
11.49 |
| 2026-09-27 00:00 |
09:28:54.40 |
-26:33:16.2 |
HIP 46558 |
10.58 |
| 2026-09-27 12:00 |
09:28:57.77 |
-26:33:58.8 |
HIP 46558 |
9.70 |
| 2026-09-28 00:00 |
09:29:01.12 |
-26:34:41.5 |
HIP 46558 |
8.86 |
| 2026-09-28 12:00 |
09:29:04.43 |
-26:35:24.4 |
HIP 46558 |
8.07 |
| 2026-09-29 00:00 |
09:29:07.73 |
-26:36:07.5 |
HIP 46558 |
7.34 |
| 2026-09-29 12:00 |
09:29:10.99 |
-26:36:50.7 |
HIP 46558 |
6.70 |
| 2026-09-30 00:00 |
09:29:14.23 |
-26:37:34.1 |
HIP 46558 |
6.18 |
| 2026-09-30 12:00 |
09:29:17.45 |
-26:38:17.7 |
HIP 46558 |
5.79 |
| 2026-10-01 00:00 |
09:29:20.64 |
-26:39:01.4 |
HIP 46558 |
5.58 |
| 2026-10-01 12:00 |
09:29:23.80 |
-26:39:45.3 |
HIP 46558 |
5.55 |
| 2026-10-02 00:00 |
09:29:26.93 |
-26:40:29.3 |
HIP 46558 |
5.71 |
| 2026-10-02 12:00 |
09:29:30.04 |
-26:41:13.5 |
HIP 46558 |
6.04 |
| 2026-10-03 00:00 |
09:29:33.12 |
-26:41:57.8 |
HIP 46558 |
6.52 |
| 2026-10-03 12:00 |
09:29:36.17 |
-26:42:42.2 |
HIP 46558 |
7.12 |
| 2026-10-04 00:00 |
09:29:39.20 |
-26:43:26.8 |
HIP 46558 |
7.80 |
| 2026-10-04 12:00 |
09:29:42.19 |
-26:44:11.5 |
HIP 46558 |
8.55 |
| 2026-10-05 00:00 |
09:29:45.16 |
-26:44:56.4 |
HIP 46558 |
9.35 |
| 2026-10-05 12:00 |
09:29:48.10 |
-26:45:41.4 |
HIP 46558 |
10.18 |
| 2026-10-06 00:00 |
09:29:51.01 |
-26:46:26.5 |
HIP 46558 |
11.04 |
| 2026-10-06 12:00 |
09:29:53.89 |
-26:47:11.8 |
HIP 46578 |
11.82 |
| 2026-10-07 00:00 |
09:29:56.75 |
-26:47:57.1 |
HIP 46578 |
12.59 |
| 2026-10-07 12:00 |
09:29:59.57 |
-26:48:42.6 |
HIP 46578 |
13.38 |
| 2026-10-08 00:00 |
09:30:02.36 |
-26:49:28.2 |
HIP 46578 |
14.20 |
| 2026-10-08 12:00 |
09:30:05.13 |
-26:50:14.0 |
HIP 46578 |
15.04 |
| 2026-10-09 00:00 |
09:30:07.86 |
-26:50:59.8 |
HIP 46703 |
15.65 |
| 2026-10-09 12:00 |
09:30:10.56 |
-26:51:45.8 |
HIP 46703 |
15.25 |
| 2026-10-10 00:00 |
09:30:13.23 |
-26:52:31.8 |
HIP 46703 |
14.90 |
| 2026-10-10 12:00 |
09:30:15.87 |
-26:53:18.0 |
HIP 46703 |
14.62 |
| 2026-10-11 00:00 |
09:30:18.49 |
-26:54:04.2 |
HIP 46703 |
14.40 |