メタデータ
| 項目 |
値 |
| Designation |
160P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-09-18T12:33:16.488000Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:49Z |
| Obs used |
973 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
31.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-09-19.0000000 |
| e |
0.47909715 |
| q (au) |
2.066541 |
| a (au) |
3.967229 |
| i (deg) |
17.276215 |
| Ω (om, deg) |
337.002091 |
| ω (w, deg) |
18.198295 |
| M (ma, deg) |
0.059483 |
等級
散乱 + 全体線形
$$
M_a = (10.016 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.016 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.994 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2019-07-15 |
2019-08-02 |
+40.9969 |
-10.922 |
| 2019-08-02 |
2020-10-25 |
-18.3580 |
+8.627 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
15:47:33.60 |
-42:51:09.6 |
HIP 77432 |
16.93 |
| 2026-05-12 12:00 |
15:47:02.22 |
-42:51:22.4 |
HIP 77321 |
17.41 |
| 2026-05-13 00:00 |
15:46:30.65 |
-42:51:32.0 |
HIP 77321 |
18.57 |
| 2026-05-13 12:00 |
15:45:58.88 |
-42:51:38.4 |
HIP 77321 |
21.36 |
| 2026-05-14 00:00 |
15:45:26.94 |
-42:51:41.7 |
HIP 77321 |
25.26 |
| 2026-05-14 12:00 |
15:44:54.82 |
-42:51:41.8 |
HIP 76948 |
25.80 |
| 2026-05-15 00:00 |
15:44:22.54 |
-42:51:38.6 |
HIP 76948 |
20.35 |
| 2026-05-15 12:00 |
15:43:50.10 |
-42:51:32.2 |
HIP 76948 |
15.25 |
| 2026-05-16 00:00 |
15:43:17.51 |
-42:51:22.6 |
HIP 76948 |
11.04 |
| 2026-05-16 12:00 |
15:42:44.79 |
-42:51:09.7 |
HIP 76948 |
9.14 |
| 2026-05-17 00:00 |
15:42:11.93 |
-42:50:53.6 |
HIP 76948 |
10.88 |
| 2026-05-17 12:00 |
15:41:38.96 |
-42:50:34.2 |
HIP 76808 |
7.71 |
| 2026-05-18 00:00 |
15:41:05.87 |
-42:50:11.5 |
HIP 76808 |
1.70 |
| 2026-05-18 12:00 |
15:40:32.68 |
-42:49:45.6 |
HIP 76808 |
4.52 |
| 2026-05-19 00:00 |
15:39:59.40 |
-42:49:16.4 |
HIP 76808 |
10.62 |
| 2026-05-19 12:00 |
15:39:26.03 |
-42:48:43.9 |
HIP 76650 |
11.03 |
| 2026-05-20 00:00 |
15:38:52.59 |
-42:48:08.1 |
HIP 76650 |
10.29 |
| 2026-05-20 12:00 |
15:38:19.08 |
-42:47:29.1 |
HIP 76650 |
12.87 |
| 2026-05-21 00:00 |
15:37:45.52 |
-42:46:46.8 |
HIP 76552 |
13.15 |
| 2026-05-21 12:00 |
15:37:11.91 |
-42:46:01.3 |
HIP 76552 |
15.25 |
| 2026-05-22 00:00 |
15:36:38.26 |
-42:45:12.5 |
HIP 76552 |
19.21 |
| 2026-05-22 12:00 |
15:36:04.59 |
-42:44:20.5 |
HIP 76260 |
16.27 |
| 2026-05-23 00:00 |
15:35:30.89 |
-42:43:25.2 |
HIP 76260 |
10.60 |
| 2026-05-23 12:00 |
15:34:57.19 |
-42:42:26.7 |
HIP 76260 |
6.22 |
| 2026-05-24 00:00 |
15:34:23.48 |
-42:41:25.0 |
HIP 76260 |
6.64 |
| 2026-05-24 12:00 |
15:33:49.78 |
-42:40:20.1 |
HIP 76260 |
11.35 |
| 2026-05-25 00:00 |
15:33:16.10 |
-42:39:12.0 |
HIP 76260 |
17.13 |
| 2026-05-25 12:00 |
15:32:42.45 |
-42:38:00.7 |
HIP 76007 |
20.36 |
| 2026-05-26 00:00 |
15:32:08.83 |
-42:36:46.3 |
HIP 76007 |
15.52 |
| 2026-05-26 12:00 |
15:31:35.25 |
-42:35:28.7 |
HIP 76007 |
12.07 |
| 2026-05-27 00:00 |
15:31:01.73 |
-42:34:08.0 |
HIP 76007 |
11.36 |
| 2026-05-27 12:00 |
15:30:28.26 |
-42:32:44.1 |
HIP 76007 |
13.84 |
| 2026-05-28 00:00 |
15:29:54.87 |
-42:31:17.2 |
HIP 76007 |
18.25 |
| 2026-05-28 12:00 |
15:29:21.56 |
-42:29:47.3 |
HIP 76007 |
23.52 |
| 2026-05-29 00:00 |
15:28:48.33 |
-42:28:14.2 |
HIP 75575 |
27.68 |
| 2026-05-29 12:00 |
15:28:15.21 |
-42:26:38.2 |
HIP 75575 |
21.40 |
| 2026-05-30 00:00 |
15:27:42.18 |
-42:24:59.2 |
HIP 75575 |
15.17 |
| 2026-05-30 12:00 |
15:27:09.27 |
-42:23:17.1 |
HIP 75575 |
9.08 |
| 2026-05-31 00:00 |
15:26:36.49 |
-42:21:32.2 |
HIP 75575 |
3.83 |
| 2026-05-31 12:00 |
15:26:03.83 |
-42:19:44.3 |
HIP 75575 |
5.14 |
| 2026-06-01 00:00 |
15:25:31.32 |
-42:17:53.5 |
HIP 75575 |
10.85 |
| 2026-06-01 12:00 |
15:24:58.95 |
-42:16:00.0 |
HIP 75333 |
16.13 |
| 2026-06-02 00:00 |
15:24:26.74 |
-42:14:03.5 |
HIP 75333 |
11.10 |