439P/LINEAR
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) |
| 2026-02-03 00:00 |
17:03:34.69 |
-23:59:37.9 |
HIP 83461 |
14.88 |
| 2026-02-03 12:00 |
17:03:58.14 |
-24:00:29.8 |
HIP 83461 |
15.38 |
| 2026-02-04 00:00 |
17:04:21.48 |
-24:01:21.5 |
HIP 83540 |
13.13 |
| 2026-02-04 12:00 |
17:04:44.70 |
-24:02:12.8 |
HIP 83540 |
12.81 |
| 2026-02-05 00:00 |
17:05:07.82 |
-24:03:03.9 |
HIP 83540 |
14.59 |
| 2026-02-05 12:00 |
17:05:30.83 |
-24:03:54.7 |
HIP 83540 |
17.84 |
| 2026-02-06 00:00 |
17:05:53.73 |
-24:04:45.3 |
HIP 83734 |
12.66 |
| 2026-02-06 12:00 |
17:06:16.51 |
-24:05:35.6 |
HIP 83734 |
7.40 |
| 2026-02-07 00:00 |
17:06:39.18 |
-24:06:25.6 |
HIP 83734 |
2.20 |
| 2026-02-07 12:00 |
17:07:01.73 |
-24:07:15.4 |
HIP 83734 |
3.12 |
| 2026-02-08 00:00 |
17:07:24.16 |
-24:08:05.0 |
HIP 83734 |
8.27 |
| 2026-02-08 12:00 |
17:07:46.48 |
-24:08:54.2 |
HIP 83734 |
13.42 |
| 2026-02-09 00:00 |
17:08:08.68 |
-24:09:43.2 |
HIP 83911 |
15.08 |
| 2026-02-09 12:00 |
17:08:30.75 |
-24:10:32.0 |
HIP 83911 |
12.53 |
| 2026-02-10 00:00 |
17:08:52.70 |
-24:11:20.5 |
HIP 83926 |
11.53 |
| 2026-02-10 12:00 |
17:09:14.53 |
-24:12:08.8 |
HIP 83926 |
9.53 |
| 2026-02-11 00:00 |
17:09:36.24 |
-24:12:56.8 |
HIP 83926 |
9.95 |
| 2026-02-11 12:00 |
17:09:57.82 |
-24:13:44.6 |
HIP 83926 |
12.53 |
| 2026-02-12 00:00 |
17:10:19.27 |
-24:14:32.1 |
HIP 83981 |
14.12 |
| 2026-02-12 12:00 |
17:10:40.60 |
-24:15:19.4 |
HIP 83981 |
16.68 |
| 2026-02-13 00:00 |
17:11:01.79 |
-24:16:06.5 |
HIP 83981 |
20.12 |
| 2026-02-13 12:00 |
17:11:22.85 |
-24:16:53.3 |
HIP 83981 |
24.04 |
| 2026-02-14 00:00 |
17:11:43.78 |
-24:17:39.9 |
HIP 83981 |
28.23 |
| 2026-02-14 12:00 |
17:12:04.58 |
-24:18:26.3 |
HIP 84284 |
27.73 |
| 2026-02-15 00:00 |
17:12:25.24 |
-24:19:12.5 |
HIP 84284 |
24.45 |
| 2026-02-15 12:00 |
17:12:45.76 |
-24:19:58.4 |
HIP 84319 |
20.88 |
| 2026-02-16 00:00 |
17:13:06.15 |
-24:20:44.1 |
HIP 84319 |
16.18 |
| 2026-02-16 12:00 |
17:13:26.40 |
-24:21:29.6 |
HIP 84319 |
11.51 |
| 2026-02-17 00:00 |
17:13:46.50 |
-24:22:14.8 |
HIP 84319 |
6.89 |
| 2026-02-17 12:00 |
17:14:06.47 |
-24:23:00.0 |
HIP 84319 |
2.36 |
| 2026-02-18 00:00 |
17:14:26.29 |
-24:23:44.7 |
HIP 84319 |
2.46 |
| 2026-02-18 12:00 |
17:14:45.96 |
-24:24:29.4 |
HIP 84319 |
6.92 |
| 2026-02-19 00:00 |
17:15:05.50 |
-24:25:13.8 |
HIP 84319 |
11.41 |
| 2026-02-19 12:00 |
17:15:24.88 |
-24:25:58.0 |
HIP 84319 |
15.88 |
| 2026-02-20 00:00 |
17:15:44.12 |
-24:26:42.0 |
HIP 84378 |
19.63 |
| 2026-02-20 12:00 |
17:16:03.20 |
-24:27:25.9 |
HIP 84378 |
21.58 |
| 2026-02-21 00:00 |
17:16:22.14 |
-24:28:09.5 |
HIP 84378 |
24.16 |
| 2026-02-21 12:00 |
17:16:40.92 |
-24:28:52.9 |
HIP 84626 |
21.59 |
| 2026-02-22 00:00 |
17:16:59.55 |
-24:29:36.2 |
HIP 84626 |
18.64 |
| 2026-02-22 12:00 |
17:17:18.03 |
-24:30:19.2 |
HIP 84626 |
16.32 |
| 2026-02-23 00:00 |
17:17:36.35 |
-24:31:02.1 |
HIP 84626 |
14.89 |
| 2026-02-23 12:00 |
17:17:54.51 |
-24:31:44.8 |
HIP 84626 |
14.60 |
| 2026-02-24 00:00 |
17:18:12.52 |
-24:32:27.3 |
HIP 84626 |
15.48 |