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 |
+38.9146 |
-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) |
| 2026-09-20 00:00 |
00:16:29.91 |
-65:39:05.1 |
HIP 1396 |
6.03 |
| 2026-09-20 12:00 |
00:16:15.28 |
-65:39:24.1 |
HIP 1396 |
7.51 |
| 2026-09-21 00:00 |
00:16:00.64 |
-65:39:42.4 |
HIP 1396 |
9.01 |
| 2026-09-21 12:00 |
00:15:45.98 |
-65:39:59.9 |
HIP 1396 |
10.53 |
| 2026-09-22 00:00 |
00:15:31.32 |
-65:40:16.6 |
HIP 1396 |
12.05 |
| 2026-09-22 12:00 |
00:15:16.65 |
-65:40:32.5 |
HIP 1396 |
13.57 |
| 2026-09-23 00:00 |
00:15:01.97 |
-65:40:47.7 |
HIP 1396 |
15.09 |
| 2026-09-23 12:00 |
00:14:47.29 |
-65:41:02.0 |
HIP 1396 |
16.62 |
| 2026-09-24 00:00 |
00:14:32.61 |
-65:41:15.6 |
HIP 1084 |
16.67 |
| 2026-09-24 12:00 |
00:14:17.92 |
-65:41:28.4 |
HIP 1084 |
15.95 |
| 2026-09-25 00:00 |
00:14:03.23 |
-65:41:40.5 |
HIP 1084 |
15.36 |
| 2026-09-25 12:00 |
00:13:48.54 |
-65:41:51.7 |
HIP 1084 |
14.92 |
| 2026-09-26 00:00 |
00:13:33.85 |
-65:42:02.2 |
HIP 1084 |
14.63 |
| 2026-09-26 12:00 |
00:13:19.17 |
-65:42:11.8 |
HIP 1084 |
14.51 |
| 2026-09-27 00:00 |
00:13:04.49 |
-65:42:20.7 |
HIP 1084 |
14.57 |
| 2026-09-27 12:00 |
00:12:49.81 |
-65:42:28.8 |
HIP 1084 |
14.78 |
| 2026-09-28 00:00 |
00:12:35.15 |
-65:42:36.1 |
HIP 1084 |
15.16 |
| 2026-09-28 12:00 |
00:12:20.49 |
-65:42:42.6 |
HIP 1084 |
15.69 |
| 2026-09-29 00:00 |
00:12:05.84 |
-65:42:48.4 |
HIP 1084 |
16.34 |
| 2026-09-29 12:00 |
00:11:51.20 |
-65:42:53.3 |
HIP 1084 |
17.12 |
| 2026-09-30 00:00 |
00:11:36.57 |
-65:42:57.5 |
HIP 1084 |
17.99 |
| 2026-09-30 12:00 |
00:11:21.96 |
-65:43:00.9 |
HIP 1084 |
18.96 |
| 2026-10-01 00:00 |
00:11:07.36 |
-65:43:03.4 |
HIP 1084 |
19.99 |
| 2026-10-01 12:00 |
00:10:52.77 |
-65:43:05.2 |
HIP 775 |
20.35 |
| 2026-10-02 00:00 |
00:10:38.21 |
-65:43:06.2 |
HIP 775 |
19.80 |
| 2026-10-02 12:00 |
00:10:23.66 |
-65:43:06.5 |
HIP 775 |
19.35 |
| 2026-10-03 00:00 |
00:10:09.14 |
-65:43:05.9 |
HIP 775 |
19.03 |
| 2026-10-03 12:00 |
00:09:54.63 |
-65:43:04.5 |
HIP 631 |
18.78 |
| 2026-10-04 00:00 |
00:09:40.15 |
-65:43:02.4 |
HIP 631 |
17.76 |
| 2026-10-04 12:00 |
00:09:25.69 |
-65:42:59.4 |
HIP 631 |
16.81 |
| 2026-10-05 00:00 |
00:09:11.26 |
-65:42:55.7 |
HIP 631 |
15.96 |
| 2026-10-05 12:00 |
00:08:56.85 |
-65:42:51.2 |
HIP 631 |
15.22 |
| 2026-10-06 00:00 |
00:08:42.47 |
-65:42:45.9 |
HIP 631 |
14.60 |
| 2026-10-06 12:00 |
00:08:28.13 |
-65:42:39.8 |
HIP 631 |
14.13 |
| 2026-10-07 00:00 |
00:08:13.81 |
-65:42:32.9 |
HIP 631 |
13.81 |
| 2026-10-07 12:00 |
00:07:59.52 |
-65:42:25.2 |
HIP 523 |
13.02 |
| 2026-10-08 00:00 |
00:07:45.27 |
-65:42:16.8 |
HIP 523 |
11.99 |
| 2026-10-08 12:00 |
00:07:31.06 |
-65:42:07.5 |
HIP 523 |
11.07 |
| 2026-10-09 00:00 |
00:07:16.88 |
-65:41:57.5 |
HIP 523 |
10.29 |
| 2026-10-09 12:00 |
00:07:02.74 |
-65:41:46.7 |
HIP 523 |
9.68 |
| 2026-10-10 00:00 |
00:06:48.64 |
-65:41:35.1 |
HIP 523 |
9.28 |
| 2026-10-10 12:00 |
00:06:34.58 |
-65:41:22.7 |
HIP 523 |
9.12 |
| 2026-10-11 00:00 |
00:06:20.56 |
-65:41:09.6 |
HIP 523 |
9.19 |