メタデータ
| 項目 |
値 |
| Designation |
C/2005 R4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-03-08T00:19:13.751040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:52Z |
| Obs used |
491 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-02-13.0000000 |
| e |
0.99748824 |
| q (au) |
5.188469 |
| a (au) |
2065.668817 |
| i (deg) |
164.012596 |
| Ω (om, deg) |
63.771672 |
| ω (w, deg) |
6.886614 |
| M (ma, deg) |
359.999758 |
等級
散乱 + 全体線形
$$
M_a = (6.968 + 4.305\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.968 |
| n |
4.305 |
| gf |
0.874 |
| gb |
-0.884 |
| k |
0.999 |
| δ90 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
18:45:08.99 |
-13:30:53.0 |
HIP 92044 |
12.01 |
| 2026-03-26 12:00 |
18:45:09.04 |
-13:30:45.9 |
HIP 92044 |
12.10 |
| 2026-03-27 00:00 |
18:45:09.07 |
-13:30:38.9 |
HIP 92044 |
12.19 |
| 2026-03-27 12:00 |
18:45:09.06 |
-13:30:31.9 |
HIP 92044 |
12.28 |
| 2026-03-28 00:00 |
18:45:09.03 |
-13:30:24.9 |
HIP 92044 |
12.38 |
| 2026-03-28 12:00 |
18:45:08.97 |
-13:30:18.0 |
HIP 92044 |
12.48 |
| 2026-03-29 00:00 |
18:45:08.88 |
-13:30:11.0 |
HIP 92044 |
12.58 |
| 2026-03-29 12:00 |
18:45:08.77 |
-13:30:04.1 |
HIP 92044 |
12.69 |
| 2026-03-30 00:00 |
18:45:08.62 |
-13:29:57.3 |
HIP 92044 |
12.81 |
| 2026-03-30 12:00 |
18:45:08.45 |
-13:29:50.4 |
HIP 92044 |
12.92 |
| 2026-03-31 00:00 |
18:45:08.24 |
-13:29:43.6 |
HIP 92044 |
13.04 |
| 2026-03-31 12:00 |
18:45:08.01 |
-13:29:36.8 |
HIP 92044 |
13.17 |
| 2026-04-01 00:00 |
18:45:07.76 |
-13:29:30.0 |
HIP 92044 |
13.30 |
| 2026-04-01 12:00 |
18:45:07.47 |
-13:29:23.3 |
HIP 92044 |
13.43 |
| 2026-04-02 00:00 |
18:45:07.15 |
-13:29:16.6 |
HIP 92044 |
13.56 |
| 2026-04-02 12:00 |
18:45:06.81 |
-13:29:09.9 |
HIP 92044 |
13.70 |
| 2026-04-03 00:00 |
18:45:06.44 |
-13:29:03.3 |
HIP 92044 |
13.84 |
| 2026-04-03 12:00 |
18:45:06.04 |
-13:28:56.7 |
HIP 92044 |
13.99 |
| 2026-04-04 00:00 |
18:45:05.61 |
-13:28:50.1 |
HIP 92044 |
14.14 |
| 2026-04-04 12:00 |
18:45:05.15 |
-13:28:43.6 |
HIP 92044 |
14.29 |
| 2026-04-05 00:00 |
18:45:04.67 |
-13:28:37.1 |
HIP 92044 |
14.45 |
| 2026-04-05 12:00 |
18:45:04.15 |
-13:28:30.6 |
HIP 92044 |
14.61 |
| 2026-04-06 00:00 |
18:45:03.61 |
-13:28:24.2 |
HIP 92044 |
14.78 |
| 2026-04-06 12:00 |
18:45:03.04 |
-13:28:17.8 |
HIP 92044 |
14.95 |
| 2026-04-07 00:00 |
18:45:02.44 |
-13:28:11.4 |
HIP 92044 |
15.12 |
| 2026-04-07 12:00 |
18:45:01.82 |
-13:28:05.1 |
HIP 92044 |
15.29 |
| 2026-04-08 00:00 |
18:45:01.16 |
-13:27:58.8 |
HIP 92044 |
15.47 |
| 2026-04-08 12:00 |
18:45:00.48 |
-13:27:52.5 |
HIP 92044 |
15.66 |
| 2026-04-09 00:00 |
18:44:59.77 |
-13:27:46.3 |
HIP 92044 |
15.85 |
| 2026-04-09 12:00 |
18:44:59.03 |
-13:27:40.1 |
HIP 92044 |
16.04 |
| 2026-04-10 00:00 |
18:44:58.26 |
-13:27:34.0 |
HIP 92044 |
16.23 |
| 2026-04-10 12:00 |
18:44:57.46 |
-13:27:27.9 |
HIP 92044 |
16.43 |
| 2026-04-11 00:00 |
18:44:56.64 |
-13:27:21.8 |
HIP 91929 |
16.46 |
| 2026-04-11 12:00 |
18:44:55.78 |
-13:27:15.8 |
HIP 91929 |
16.27 |
| 2026-04-12 00:00 |
18:44:54.90 |
-13:27:09.8 |
HIP 91929 |
16.09 |
| 2026-04-12 12:00 |
18:44:53.99 |
-13:27:03.9 |
HIP 91929 |
15.90 |
| 2026-04-13 00:00 |
18:44:53.06 |
-13:26:58.0 |
HIP 91929 |
15.71 |
| 2026-04-13 12:00 |
18:44:52.09 |
-13:26:52.1 |
HIP 91929 |
15.52 |
| 2026-04-14 00:00 |
18:44:51.10 |
-13:26:46.3 |
HIP 91929 |
15.34 |
| 2026-04-14 12:00 |
18:44:50.08 |
-13:26:40.6 |
HIP 91929 |
15.15 |
| 2026-04-15 00:00 |
18:44:49.03 |
-13:26:34.9 |
HIP 91929 |
14.96 |
| 2026-04-15 12:00 |
18:44:47.95 |
-13:26:29.2 |
HIP 91929 |
14.77 |
| 2026-04-16 00:00 |
18:44:46.84 |
-13:26:23.6 |
HIP 91929 |
14.59 |