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) |
| 2026-05-12 00:00 |
18:43:13.29 |
-13:22:45.6 |
HIP 91929 |
20.13 |
| 2026-05-12 12:00 |
18:43:10.85 |
-13:22:43.0 |
HIP 91929 |
20.63 |
| 2026-05-13 00:00 |
18:43:08.39 |
-13:22:40.5 |
HIP 91929 |
21.13 |
| 2026-05-13 12:00 |
18:43:05.90 |
-13:22:38.0 |
HIP 91929 |
21.65 |
| 2026-05-14 00:00 |
18:43:03.40 |
-13:22:35.6 |
HIP 91929 |
22.18 |
| 2026-05-14 12:00 |
18:43:00.87 |
-13:22:33.3 |
HIP 91929 |
22.71 |
| 2026-05-15 00:00 |
18:42:58.33 |
-13:22:31.0 |
HIP 91929 |
23.26 |
| 2026-05-15 12:00 |
18:42:55.76 |
-13:22:28.9 |
HIP 91929 |
23.81 |
| 2026-05-16 00:00 |
18:42:53.17 |
-13:22:26.7 |
HIP 91929 |
24.38 |
| 2026-05-16 12:00 |
18:42:50.56 |
-13:22:24.7 |
HIP 91929 |
24.95 |
| 2026-05-17 00:00 |
18:42:47.93 |
-13:22:22.7 |
HIP 91929 |
25.53 |
| 2026-05-17 12:00 |
18:42:45.28 |
-13:22:20.8 |
HIP 91929 |
26.11 |
| 2026-05-18 00:00 |
18:42:42.61 |
-13:22:19.0 |
HIP 91608 |
25.60 |
| 2026-05-18 12:00 |
18:42:39.92 |
-13:22:17.2 |
HIP 91608 |
24.95 |
| 2026-05-19 00:00 |
18:42:37.21 |
-13:22:15.5 |
HIP 91608 |
24.29 |
| 2026-05-19 12:00 |
18:42:34.48 |
-13:22:13.9 |
HIP 91608 |
23.62 |
| 2026-05-20 00:00 |
18:42:31.73 |
-13:22:12.3 |
HIP 91608 |
22.96 |
| 2026-05-20 12:00 |
18:42:28.96 |
-13:22:10.8 |
HIP 91608 |
22.28 |
| 2026-05-21 00:00 |
18:42:26.18 |
-13:22:09.4 |
HIP 91608 |
21.61 |
| 2026-05-21 12:00 |
18:42:23.37 |
-13:22:08.0 |
HIP 91608 |
20.93 |
| 2026-05-22 00:00 |
18:42:20.55 |
-13:22:06.8 |
HIP 91608 |
20.24 |
| 2026-05-22 12:00 |
18:42:17.71 |
-13:22:05.5 |
HIP 91608 |
19.55 |
| 2026-05-23 00:00 |
18:42:14.85 |
-13:22:04.4 |
HIP 91608 |
18.86 |
| 2026-05-23 12:00 |
18:42:11.97 |
-13:22:03.3 |
HIP 91608 |
18.16 |
| 2026-05-24 00:00 |
18:42:09.08 |
-13:22:02.3 |
HIP 91608 |
17.45 |
| 2026-05-24 12:00 |
18:42:06.16 |
-13:22:01.4 |
HIP 91608 |
16.75 |
| 2026-05-25 00:00 |
18:42:03.23 |
-13:22:00.6 |
HIP 91608 |
16.03 |
| 2026-05-25 12:00 |
18:42:00.29 |
-13:21:59.8 |
HIP 91608 |
15.32 |
| 2026-05-26 00:00 |
18:41:57.32 |
-13:21:59.1 |
HIP 91608 |
14.60 |
| 2026-05-26 12:00 |
18:41:54.34 |
-13:21:58.4 |
HIP 91608 |
13.88 |
| 2026-05-27 00:00 |
18:41:51.35 |
-13:21:57.8 |
HIP 91608 |
13.15 |
| 2026-05-27 12:00 |
18:41:48.34 |
-13:21:57.3 |
HIP 91608 |
12.42 |
| 2026-05-28 00:00 |
18:41:45.31 |
-13:21:56.9 |
HIP 91608 |
11.68 |
| 2026-05-28 12:00 |
18:41:42.26 |
-13:21:56.6 |
HIP 91608 |
10.95 |
| 2026-05-29 00:00 |
18:41:39.21 |
-13:21:56.3 |
HIP 91608 |
10.20 |
| 2026-05-29 12:00 |
18:41:36.13 |
-13:21:56.1 |
HIP 91608 |
9.46 |
| 2026-05-30 00:00 |
18:41:33.04 |
-13:21:55.9 |
HIP 91608 |
8.71 |
| 2026-05-30 12:00 |
18:41:29.94 |
-13:21:55.8 |
HIP 91608 |
7.96 |
| 2026-05-31 00:00 |
18:41:26.82 |
-13:21:55.8 |
HIP 91608 |
7.20 |
| 2026-05-31 12:00 |
18:41:23.68 |
-13:21:55.9 |
HIP 91608 |
6.44 |
| 2026-06-01 00:00 |
18:41:20.53 |
-13:21:56.0 |
HIP 91608 |
5.68 |
| 2026-06-01 12:00 |
18:41:17.37 |
-13:21:56.3 |
HIP 91608 |
4.92 |
| 2026-06-02 00:00 |
18:41:14.20 |
-13:21:56.5 |
HIP 91608 |
4.16 |