メタデータ
| 項目 |
値 |
| Designation |
439P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-01-23T23:09:05.474880Z |
| Orbit solution date (soln_date, UTC) |
2022-02-05T22:46:18Z |
| Obs used |
154 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
23.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-01-18.0000000 |
| e |
0.50983794 |
| q (au) |
1.646306 |
| a (au) |
3.358697 |
| i (deg) |
6.957515 |
| Ω (om, deg) |
59.100410 |
| ω (w, deg) |
337.647279 |
| M (ma, deg) |
57.489034 |
等級
散乱 + 全体線形
$$
M_a = (18.779 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.779 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.897 |
| k |
0.992 |
| 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 |
17:21:45.77 |
-25:58:34.8 |
HIP 84996 |
16.52 |
| 2026-05-12 12:00 |
17:21:28.33 |
-25:58:54.4 |
HIP 84996 |
18.53 |
| 2026-05-13 00:00 |
17:21:10.68 |
-25:59:13.6 |
HIP 84996 |
21.12 |
| 2026-05-13 12:00 |
17:20:52.81 |
-25:59:32.4 |
HIP 84933 |
22.35 |
| 2026-05-14 00:00 |
17:20:34.74 |
-25:59:50.8 |
HIP 84933 |
23.90 |
| 2026-05-14 12:00 |
17:20:16.46 |
-26:00:08.8 |
HIP 84933 |
26.04 |
| 2026-05-15 00:00 |
17:19:57.97 |
-26:00:26.3 |
HIP 84933 |
28.65 |
| 2026-05-15 12:00 |
17:19:39.29 |
-26:00:43.5 |
HIP 84933 |
31.63 |
| 2026-05-16 00:00 |
17:19:20.40 |
-26:01:00.2 |
HIP 84933 |
34.91 |
| 2026-05-16 12:00 |
17:19:01.32 |
-26:01:16.5 |
HIP 84851 |
37.51 |
| 2026-05-17 00:00 |
17:18:42.04 |
-26:01:32.3 |
HIP 84605 |
38.81 |
| 2026-05-17 12:00 |
17:18:22.58 |
-26:01:47.7 |
HIP 84605 |
37.21 |
| 2026-05-18 00:00 |
17:18:02.93 |
-26:02:02.6 |
HIP 84605 |
36.08 |
| 2026-05-18 12:00 |
17:17:43.09 |
-26:02:17.1 |
HIP 84605 |
35.46 |
| 2026-05-19 00:00 |
17:17:23.08 |
-26:02:31.1 |
HIP 84478 |
33.87 |
| 2026-05-19 12:00 |
17:17:02.89 |
-26:02:44.7 |
HIP 84356 |
31.68 |
| 2026-05-20 00:00 |
17:16:42.52 |
-26:02:57.8 |
HIP 84356 |
27.30 |
| 2026-05-20 12:00 |
17:16:21.98 |
-26:03:10.4 |
HIP 84356 |
22.97 |
| 2026-05-21 00:00 |
17:16:01.28 |
-26:03:22.5 |
HIP 84356 |
18.74 |
| 2026-05-21 12:00 |
17:15:40.42 |
-26:03:34.2 |
HIP 84356 |
14.74 |
| 2026-05-22 00:00 |
17:15:19.39 |
-26:03:45.4 |
HIP 84356 |
11.25 |
| 2026-05-22 12:00 |
17:14:58.21 |
-26:03:56.1 |
HIP 84356 |
8.95 |
| 2026-05-23 00:00 |
17:14:36.87 |
-26:04:06.3 |
HIP 84356 |
8.90 |
| 2026-05-23 12:00 |
17:14:15.39 |
-26:04:15.9 |
HIP 84356 |
11.16 |
| 2026-05-24 00:00 |
17:13:53.76 |
-26:04:25.1 |
HIP 84356 |
14.74 |
| 2026-05-24 12:00 |
17:13:31.99 |
-26:04:33.8 |
HIP 84356 |
18.92 |
| 2026-05-25 00:00 |
17:13:10.07 |
-26:04:42.0 |
HIP 84356 |
23.41 |
| 2026-05-25 12:00 |
17:12:48.03 |
-26:04:49.7 |
HIP 84114 |
25.45 |
| 2026-05-26 00:00 |
17:12:25.85 |
-26:04:56.8 |
HIP 84114 |
23.07 |
| 2026-05-26 12:00 |
17:12:03.54 |
-26:05:03.5 |
HIP 84114 |
21.60 |
| 2026-05-27 00:00 |
17:11:41.11 |
-26:05:09.6 |
HIP 84114 |
21.25 |
| 2026-05-27 12:00 |
17:11:18.56 |
-26:05:15.2 |
HIP 84114 |
22.08 |
| 2026-05-28 00:00 |
17:10:55.89 |
-26:05:20.3 |
HIP 84114 |
24.00 |
| 2026-05-28 12:00 |
17:10:33.11 |
-26:05:24.8 |
HIP 84114 |
26.78 |
| 2026-05-29 00:00 |
17:10:10.22 |
-26:05:28.8 |
HIP 84114 |
30.19 |
| 2026-05-29 12:00 |
17:09:47.22 |
-26:05:32.3 |
HIP 84114 |
34.07 |
| 2026-05-30 00:00 |
17:09:24.13 |
-26:05:35.3 |
HIP 84114 |
38.27 |
| 2026-05-30 12:00 |
17:09:00.93 |
-26:05:37.7 |
HIP 83740 |
38.10 |
| 2026-05-31 00:00 |
17:08:37.64 |
-26:05:39.6 |
HIP 83740 |
34.33 |
| 2026-05-31 12:00 |
17:08:14.26 |
-26:05:40.9 |
HIP 83740 |
30.98 |
| 2026-06-01 00:00 |
17:07:50.79 |
-26:05:41.8 |
HIP 83740 |
28.21 |
| 2026-06-01 12:00 |
17:07:27.25 |
-26:05:42.0 |
HIP 83740 |
26.21 |
| 2026-06-02 00:00 |
17:07:03.62 |
-26:05:41.8 |
HIP 83740 |
25.19 |