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) |
| 2026-07-29 00:00 |
15:02:49.15 |
-36:34:16.1 |
HIP 73739 |
19.83 |
| 2026-07-29 12:00 |
15:03:02.97 |
-36:31:45.8 |
HIP 73739 |
18.20 |
| 2026-07-30 00:00 |
15:03:17.20 |
-36:29:17.0 |
HIP 73739 |
17.15 |
| 2026-07-30 12:00 |
15:03:31.85 |
-36:26:49.6 |
HIP 73739 |
16.83 |
| 2026-07-31 00:00 |
15:03:46.91 |
-36:24:23.7 |
HIP 73739 |
17.31 |
| 2026-07-31 12:00 |
15:04:02.38 |
-36:21:59.3 |
HIP 73739 |
18.56 |
| 2026-08-01 00:00 |
15:04:18.27 |
-36:19:36.3 |
HIP 73739 |
20.47 |
| 2026-08-01 12:00 |
15:04:34.55 |
-36:17:14.8 |
HIP 73901 |
20.08 |
| 2026-08-02 00:00 |
15:04:51.25 |
-36:14:54.8 |
HIP 73901 |
16.70 |
| 2026-08-02 12:00 |
15:05:08.35 |
-36:12:36.3 |
HIP 73879 |
12.78 |
| 2026-08-03 00:00 |
15:05:25.85 |
-36:10:19.3 |
HIP 73879 |
8.57 |
| 2026-08-03 12:00 |
15:05:43.75 |
-36:08:03.8 |
HIP 73879 |
4.31 |
| 2026-08-04 00:00 |
15:06:02.05 |
-36:05:49.7 |
HIP 73879 |
0.23 |
| 2026-08-04 12:00 |
15:06:20.75 |
-36:03:37.1 |
HIP 73879 |
4.40 |
| 2026-08-05 00:00 |
15:06:39.84 |
-36:01:26.0 |
HIP 73879 |
8.83 |
| 2026-08-05 12:00 |
15:06:59.33 |
-35:59:16.5 |
HIP 73879 |
13.33 |
| 2026-08-06 00:00 |
15:07:19.21 |
-35:57:08.4 |
HIP 73879 |
17.88 |
| 2026-08-06 12:00 |
15:07:39.48 |
-35:55:01.8 |
HIP 73879 |
22.50 |
| 2026-08-07 00:00 |
15:08:00.14 |
-35:52:56.6 |
HIP 74196 |
20.47 |
| 2026-08-07 12:00 |
15:08:21.20 |
-35:50:53.0 |
HIP 74196 |
16.22 |
| 2026-08-08 00:00 |
15:08:42.63 |
-35:48:50.9 |
HIP 74196 |
12.24 |
| 2026-08-08 12:00 |
15:09:04.45 |
-35:46:50.2 |
HIP 74196 |
9.02 |
| 2026-08-09 00:00 |
15:09:26.66 |
-35:44:51.1 |
HIP 74196 |
7.68 |
| 2026-08-09 12:00 |
15:09:49.25 |
-35:42:53.4 |
HIP 74196 |
9.21 |
| 2026-08-10 00:00 |
15:10:12.22 |
-35:40:57.2 |
HIP 74196 |
12.68 |
| 2026-08-10 12:00 |
15:10:35.57 |
-35:39:02.4 |
HIP 74196 |
17.00 |
| 2026-08-11 00:00 |
15:10:59.30 |
-35:37:09.2 |
HIP 74196 |
21.70 |
| 2026-08-11 12:00 |
15:11:23.40 |
-35:35:17.4 |
HIP 74417 |
24.04 |
| 2026-08-12 00:00 |
15:11:47.88 |
-35:33:27.1 |
HIP 74417 |
23.32 |
| 2026-08-12 12:00 |
15:12:12.73 |
-35:31:38.2 |
HIP 74417 |
23.76 |
| 2026-08-13 00:00 |
15:12:37.95 |
-35:29:50.8 |
HIP 74534 |
24.72 |
| 2026-08-13 12:00 |
15:13:03.54 |
-35:28:04.9 |
HIP 74534 |
23.75 |
| 2026-08-14 00:00 |
15:13:29.49 |
-35:26:20.4 |
HIP 74534 |
24.00 |
| 2026-08-14 12:00 |
15:13:55.82 |
-35:24:37.3 |
HIP 74534 |
25.46 |
| 2026-08-15 00:00 |
15:14:22.50 |
-35:22:55.7 |
HIP 74534 |
27.99 |
| 2026-08-15 12:00 |
15:14:49.55 |
-35:21:15.5 |
HIP 74534 |
31.37 |
| 2026-08-16 00:00 |
15:15:16.96 |
-35:19:36.7 |
HIP 74686 |
32.06 |
| 2026-08-16 12:00 |
15:15:44.72 |
-35:17:59.3 |
HIP 74686 |
29.80 |
| 2026-08-17 00:00 |
15:16:12.84 |
-35:16:23.3 |
HIP 74686 |
28.63 |
| 2026-08-17 12:00 |
15:16:41.31 |
-35:14:48.7 |
HIP 74686 |
28.74 |
| 2026-08-18 00:00 |
15:17:10.14 |
-35:13:15.4 |
HIP 74686 |
30.14 |
| 2026-08-18 12:00 |
15:17:39.31 |
-35:11:43.6 |
HIP 74686 |
32.72 |
| 2026-08-19 00:00 |
15:18:08.83 |
-35:10:13.0 |
HIP 75056 |
29.43 |