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) |
| 2026-05-12 00:00 |
09:12:33.45 |
-26:24:02.7 |
HIP 45331 |
26.78 |
| 2026-05-12 12:00 |
09:12:34.10 |
-26:23:23.4 |
HIP 45331 |
26.37 |
| 2026-05-13 00:00 |
09:12:34.79 |
-26:22:44.4 |
HIP 45331 |
25.95 |
| 2026-05-13 12:00 |
09:12:35.51 |
-26:22:05.5 |
HIP 45331 |
25.55 |
| 2026-05-14 00:00 |
09:12:36.28 |
-26:21:26.8 |
HIP 45331 |
25.14 |
| 2026-05-14 12:00 |
09:12:37.08 |
-26:20:48.3 |
HIP 45331 |
24.74 |
| 2026-05-15 00:00 |
09:12:37.92 |
-26:20:10.0 |
HIP 45331 |
24.35 |
| 2026-05-15 12:00 |
09:12:38.80 |
-26:19:31.9 |
HIP 45331 |
23.96 |
| 2026-05-16 00:00 |
09:12:39.72 |
-26:18:53.9 |
HIP 45331 |
23.58 |
| 2026-05-16 12:00 |
09:12:40.67 |
-26:18:16.2 |
HIP 45331 |
23.20 |
| 2026-05-17 00:00 |
09:12:41.66 |
-26:17:38.6 |
HIP 45331 |
22.82 |
| 2026-05-17 12:00 |
09:12:42.70 |
-26:17:01.3 |
HIP 45331 |
22.45 |
| 2026-05-18 00:00 |
09:12:43.76 |
-26:16:24.2 |
HIP 45331 |
22.09 |
| 2026-05-18 12:00 |
09:12:44.87 |
-26:15:47.3 |
HIP 45331 |
21.74 |
| 2026-05-19 00:00 |
09:12:46.01 |
-26:15:10.6 |
HIP 45331 |
21.39 |
| 2026-05-19 12:00 |
09:12:47.19 |
-26:14:34.1 |
HIP 45331 |
21.05 |
| 2026-05-20 00:00 |
09:12:48.41 |
-26:13:57.8 |
HIP 45331 |
20.71 |
| 2026-05-20 12:00 |
09:12:49.67 |
-26:13:21.8 |
HIP 45331 |
20.39 |
| 2026-05-21 00:00 |
09:12:50.96 |
-26:12:46.0 |
HIP 45331 |
20.07 |
| 2026-05-21 12:00 |
09:12:52.29 |
-26:12:10.4 |
HIP 45331 |
19.76 |
| 2026-05-22 00:00 |
09:12:53.65 |
-26:11:35.0 |
HIP 45331 |
19.47 |
| 2026-05-22 12:00 |
09:12:55.05 |
-26:10:59.9 |
HIP 45331 |
19.18 |
| 2026-05-23 00:00 |
09:12:56.49 |
-26:10:25.0 |
HIP 45331 |
18.90 |
| 2026-05-23 12:00 |
09:12:57.96 |
-26:09:50.3 |
HIP 45331 |
18.63 |
| 2026-05-24 00:00 |
09:12:59.47 |
-26:09:15.8 |
HIP 45331 |
18.38 |
| 2026-05-24 12:00 |
09:13:01.02 |
-26:08:41.7 |
HIP 45331 |
18.13 |
| 2026-05-25 00:00 |
09:13:02.60 |
-26:08:07.7 |
HIP 45331 |
17.90 |
| 2026-05-25 12:00 |
09:13:04.22 |
-26:07:34.0 |
HIP 45331 |
17.68 |
| 2026-05-26 00:00 |
09:13:05.87 |
-26:07:00.5 |
HIP 45331 |
17.48 |
| 2026-05-26 12:00 |
09:13:07.56 |
-26:06:27.3 |
HIP 45331 |
17.29 |
| 2026-05-27 00:00 |
09:13:09.28 |
-26:05:54.3 |
HIP 45331 |
17.12 |
| 2026-05-27 12:00 |
09:13:11.03 |
-26:05:21.6 |
HIP 45331 |
16.96 |
| 2026-05-28 00:00 |
09:13:12.83 |
-26:04:49.2 |
HIP 45331 |
16.82 |
| 2026-05-28 12:00 |
09:13:14.65 |
-26:04:16.9 |
HIP 45331 |
16.70 |
| 2026-05-29 00:00 |
09:13:16.51 |
-26:03:45.0 |
HIP 45331 |
16.59 |
| 2026-05-29 12:00 |
09:13:18.41 |
-26:03:13.3 |
HIP 45331 |
16.50 |
| 2026-05-30 00:00 |
09:13:20.34 |
-26:02:41.9 |
HIP 45331 |
16.43 |
| 2026-05-30 12:00 |
09:13:22.30 |
-26:02:10.7 |
HIP 45331 |
16.38 |
| 2026-05-31 00:00 |
09:13:24.30 |
-26:01:39.8 |
HIP 45355 |
16.02 |
| 2026-05-31 12:00 |
09:13:26.33 |
-26:01:09.2 |
HIP 45355 |
15.48 |
| 2026-06-01 00:00 |
09:13:28.39 |
-26:00:38.8 |
HIP 45355 |
14.93 |
| 2026-06-01 12:00 |
09:13:30.49 |
-26:00:08.7 |
HIP 45355 |
14.40 |
| 2026-06-02 00:00 |
09:13:32.62 |
-25:59:38.9 |
HIP 45355 |
13.87 |