メタデータ
| 項目 |
値 |
| Designation |
C/2016 A8 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-08-30T16:04:12.187200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:22Z |
| Obs used |
1422 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
13.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-08-11.0000000 |
| e |
0.94634519 |
| q (au) |
1.881129 |
| a (au) |
35.059838 |
| i (deg) |
148.211836 |
| Ω (om, deg) |
111.232164 |
| ω (w, deg) |
130.265301 |
| M (ma, deg) |
359.906613 |
等級
散乱 + 全体線形
$$
M_a = (9.519 + 5.854\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.519 |
| n |
5.854 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| δ90 |
10.000 |
| 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 |
| 2014-08-24 |
2016-01-17 |
-32.6027 |
+16.540 |
| 2016-01-17 |
2016-08-30 |
+0.8040 |
-0.427 |
| 2016-08-30 |
2017-03-05 |
-3.2783 |
+0.896 |
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) |
| 2026-03-26 00:00 |
11:29:48.43 |
-32:23:50.3 |
HIP 56212 |
24.54 |
| 2026-03-26 12:00 |
11:29:41.90 |
-32:23:07.9 |
HIP 56212 |
26.08 |
| 2026-03-27 00:00 |
11:29:35.39 |
-32:22:25.2 |
HIP 56212 |
27.62 |
| 2026-03-27 12:00 |
11:29:28.89 |
-32:21:42.0 |
HIP 55921 |
26.21 |
| 2026-03-28 00:00 |
11:29:22.41 |
-32:20:58.5 |
HIP 55921 |
24.66 |
| 2026-03-28 12:00 |
11:29:15.95 |
-32:20:14.7 |
HIP 55921 |
23.11 |
| 2026-03-29 00:00 |
11:29:09.50 |
-32:19:30.5 |
HIP 55921 |
21.56 |
| 2026-03-29 12:00 |
11:29:03.08 |
-32:18:45.9 |
HIP 55921 |
20.02 |
| 2026-03-30 00:00 |
11:28:56.67 |
-32:18:01.0 |
HIP 55921 |
18.47 |
| 2026-03-30 12:00 |
11:28:50.28 |
-32:17:15.7 |
HIP 55921 |
16.92 |
| 2026-03-31 00:00 |
11:28:43.91 |
-32:16:30.1 |
HIP 55921 |
15.38 |
| 2026-03-31 12:00 |
11:28:37.56 |
-32:15:44.2 |
HIP 55921 |
13.83 |
| 2026-04-01 00:00 |
11:28:31.23 |
-32:14:57.9 |
HIP 55921 |
12.29 |
| 2026-04-01 12:00 |
11:28:24.92 |
-32:14:11.3 |
HIP 55921 |
10.74 |
| 2026-04-02 00:00 |
11:28:18.64 |
-32:13:24.3 |
HIP 55921 |
9.20 |
| 2026-04-02 12:00 |
11:28:12.37 |
-32:12:37.1 |
HIP 55921 |
7.66 |
| 2026-04-03 00:00 |
11:28:06.13 |
-32:11:49.5 |
HIP 55921 |
6.12 |
| 2026-04-03 12:00 |
11:27:59.91 |
-32:11:01.6 |
HIP 55921 |
4.59 |
| 2026-04-04 00:00 |
11:27:53.71 |
-32:10:13.3 |
HIP 55921 |
3.06 |
| 2026-04-04 12:00 |
11:27:47.54 |
-32:09:24.8 |
HIP 55921 |
1.55 |
| 2026-04-05 00:00 |
11:27:41.39 |
-32:08:36.0 |
HIP 55921 |
0.42 |
| 2026-04-05 12:00 |
11:27:35.27 |
-32:07:46.8 |
HIP 55921 |
1.63 |
| 2026-04-06 00:00 |
11:27:29.17 |
-32:06:57.4 |
HIP 55921 |
3.14 |
| 2026-04-06 12:00 |
11:27:23.10 |
-32:06:07.7 |
HIP 55921 |
4.66 |
| 2026-04-07 00:00 |
11:27:17.05 |
-32:05:17.7 |
HIP 55921 |
6.18 |
| 2026-04-07 12:00 |
11:27:11.03 |
-32:04:27.4 |
HIP 55921 |
7.71 |
| 2026-04-08 00:00 |
11:27:05.03 |
-32:03:36.8 |
HIP 55921 |
9.23 |
| 2026-04-08 12:00 |
11:26:59.07 |
-32:02:45.9 |
HIP 55921 |
10.75 |
| 2026-04-09 00:00 |
11:26:53.13 |
-32:01:54.8 |
HIP 55921 |
12.27 |
| 2026-04-09 12:00 |
11:26:47.21 |
-32:01:03.4 |
HIP 55921 |
13.79 |
| 2026-04-10 00:00 |
11:26:41.33 |
-32:00:11.7 |
HIP 55921 |
15.31 |
| 2026-04-10 12:00 |
11:26:35.48 |
-31:59:19.8 |
HIP 55921 |
16.82 |
| 2026-04-11 00:00 |
11:26:29.65 |
-31:58:27.6 |
HIP 55921 |
18.33 |
| 2026-04-11 12:00 |
11:26:23.86 |
-31:57:35.2 |
HIP 55714 |
18.18 |
| 2026-04-12 00:00 |
11:26:18.10 |
-31:56:42.5 |
HIP 55714 |
17.11 |
| 2026-04-12 12:00 |
11:26:12.36 |
-31:55:49.6 |
HIP 55714 |
16.12 |
| 2026-04-13 00:00 |
11:26:06.66 |
-31:54:56.4 |
HIP 55714 |
15.23 |
| 2026-04-13 12:00 |
11:26:00.99 |
-31:54:03.0 |
HIP 55714 |
14.44 |
| 2026-04-14 00:00 |
11:25:55.35 |
-31:53:09.4 |
HIP 55714 |
13.78 |
| 2026-04-14 12:00 |
11:25:49.74 |
-31:52:15.5 |
HIP 55714 |
13.26 |
| 2026-04-15 00:00 |
11:25:44.17 |
-31:51:21.4 |
HIP 55714 |
12.90 |
| 2026-04-15 12:00 |
11:25:38.63 |
-31:50:27.2 |
HIP 55714 |
12.71 |
| 2026-04-16 00:00 |
11:25:33.13 |
-31:49:32.7 |
HIP 55714 |
12.70 |