C/2016 N6 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2016 N6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-07-18T04:53:54.179520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
3071 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
10.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-02-01.0000000 |
| e |
0.99865186 |
| q (au) |
2.669116 |
| a (au) |
1979.851996 |
| i (deg) |
105.830421 |
| Ω (om, deg) |
298.977675 |
| ω (w, deg) |
162.803199 |
| M (ma, deg) |
359.998129 |
等級
散乱 + 全体線形
$$
M_a = (9.902 + 3.333\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.902 |
| n |
3.333 |
| gf |
1.000 |
| gb |
-0.687 |
| k |
0.800 |
| 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 |
| 2016-06-27 |
2016-10-28 |
+38.9147 |
-31.451 |
| 2016-10-28 |
2018-06-20 |
+1.1594 |
-0.936 |
| 2018-08-28 |
2019-01-14 |
+13.3133 |
-6.770 |
| 2019-01-14 |
2020-12-12 |
-0.7531 |
+0.155 |
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) |
| 2026-02-03 00:00 |
00:06:54.42 |
-62:10:23.5 |
HIP 621 |
9.83 |
| 2026-02-03 12:00 |
00:07:00.99 |
-62:09:09.8 |
HIP 621 |
10.59 |
| 2026-02-04 00:00 |
00:07:07.63 |
-62:07:56.4 |
HIP 621 |
11.47 |
| 2026-02-04 12:00 |
00:07:14.33 |
-62:06:43.4 |
HIP 621 |
12.45 |
| 2026-02-05 00:00 |
00:07:21.09 |
-62:05:30.7 |
HIP 621 |
13.51 |
| 2026-02-05 12:00 |
00:07:27.92 |
-62:04:18.5 |
HIP 621 |
14.63 |
| 2026-02-06 00:00 |
00:07:34.81 |
-62:03:06.6 |
HIP 621 |
15.80 |
| 2026-02-06 12:00 |
00:07:41.76 |
-62:01:55.1 |
HIP 621 |
17.00 |
| 2026-02-07 00:00 |
00:07:48.78 |
-62:00:44.1 |
HIP 621 |
18.23 |
| 2026-02-07 12:00 |
00:07:55.85 |
-61:59:33.4 |
HIP 621 |
19.48 |
| 2026-02-08 00:00 |
00:08:02.98 |
-61:58:23.1 |
HIP 621 |
20.75 |
| 2026-02-08 12:00 |
00:08:10.18 |
-61:57:13.3 |
HIP 621 |
22.04 |
| 2026-02-09 00:00 |
00:08:17.43 |
-61:56:03.8 |
HIP 621 |
23.33 |
| 2026-02-09 12:00 |
00:08:24.74 |
-61:54:54.8 |
HIP 621 |
24.64 |
| 2026-02-10 00:00 |
00:08:32.11 |
-61:53:46.2 |
HIP 798 |
25.80 |
| 2026-02-10 12:00 |
00:08:39.53 |
-61:52:38.0 |
HIP 798 |
26.57 |
| 2026-02-11 00:00 |
00:08:47.01 |
-61:51:30.2 |
HIP 798 |
27.39 |
| 2026-02-11 12:00 |
00:08:54.55 |
-61:50:22.9 |
HIP 798 |
28.24 |
| 2026-02-12 00:00 |
00:09:02.14 |
-61:49:16.0 |
HIP 994 |
27.31 |
| 2026-02-12 12:00 |
00:09:09.79 |
-61:48:09.6 |
HIP 994 |
26.00 |
| 2026-02-13 00:00 |
00:09:17.48 |
-61:47:03.5 |
HIP 994 |
24.70 |
| 2026-02-13 12:00 |
00:09:25.24 |
-61:45:58.0 |
HIP 994 |
23.42 |
| 2026-02-14 00:00 |
00:09:33.04 |
-61:44:52.9 |
HIP 994 |
22.14 |
| 2026-02-14 12:00 |
00:09:40.89 |
-61:43:48.2 |
HIP 994 |
20.88 |
| 2026-02-15 00:00 |
00:09:48.80 |
-61:42:44.0 |
HIP 994 |
19.64 |
| 2026-02-15 12:00 |
00:09:56.75 |
-61:41:40.3 |
HIP 994 |
18.42 |
| 2026-02-16 00:00 |
00:10:04.76 |
-61:40:37.0 |
HIP 994 |
17.22 |
| 2026-02-16 12:00 |
00:10:12.81 |
-61:39:34.2 |
HIP 994 |
16.06 |
| 2026-02-17 00:00 |
00:10:20.91 |
-61:38:31.9 |
HIP 994 |
14.94 |
| 2026-02-17 12:00 |
00:10:29.06 |
-61:37:30.1 |
HIP 994 |
13.86 |
| 2026-02-18 00:00 |
00:10:37.26 |
-61:36:28.7 |
HIP 994 |
12.84 |
| 2026-02-18 12:00 |
00:10:45.50 |
-61:35:27.9 |
HIP 994 |
11.90 |
| 2026-02-19 00:00 |
00:10:53.78 |
-61:34:27.5 |
HIP 994 |
11.05 |
| 2026-02-19 12:00 |
00:11:02.11 |
-61:33:27.6 |
HIP 994 |
10.31 |
| 2026-02-20 00:00 |
00:11:10.49 |
-61:32:28.2 |
HIP 994 |
9.71 |
| 2026-02-20 12:00 |
00:11:18.90 |
-61:31:29.3 |
HIP 994 |
9.27 |
| 2026-02-21 00:00 |
00:11:27.36 |
-61:30:30.9 |
HIP 994 |
9.03 |
| 2026-02-21 12:00 |
00:11:35.86 |
-61:29:33.0 |
HIP 994 |
8.99 |
| 2026-02-22 00:00 |
00:11:44.40 |
-61:28:35.7 |
HIP 994 |
9.15 |
| 2026-02-22 12:00 |
00:11:52.98 |
-61:27:38.8 |
HIP 994 |
9.51 |
| 2026-02-23 00:00 |
00:12:01.59 |
-61:26:42.5 |
HIP 1017 |
9.17 |
| 2026-02-23 12:00 |
00:12:10.25 |
-61:25:46.6 |
HIP 1017 |
7.86 |
| 2026-02-24 00:00 |
00:12:18.94 |
-61:24:51.3 |
HIP 1017 |
6.59 |