C/2016 M1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2016 M1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-08-10T04:14:19.821120Z |
| Orbit solution date (soln_date, UTC) |
2022-03-09T09:02:19Z |
| Obs used |
3553 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
6.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-01-25.0000000 |
| e |
0.99907148 |
| q (au) |
2.210500 |
| a (au) |
2380.662751 |
| i (deg) |
90.993781 |
| Ω (om, deg) |
92.204019 |
| ω (w, deg) |
209.825799 |
| M (ma, deg) |
359.998327 |
等級
散乱 + 全体線形
$$
M_a = (6.647 + 3.591\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.647 |
| n |
3.591 |
| gf |
1.000 |
| gb |
-0.868 |
| k |
0.997 |
| 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 |
| 2016-04-11 |
2017-08-24 |
-0.5533 |
+0.506 |
| 2017-08-24 |
2018-08-10 |
+3.5982 |
-2.285 |
| 2018-08-10 |
2022-03-01 |
+3.6707 |
-3.222 |
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 |
06:01:38.82 |
+13:40:03.7 |
HIP 28620 |
25.96 |
| 2026-02-03 12:00 |
06:01:34.10 |
+13:40:25.3 |
HIP 28620 |
26.84 |
| 2026-02-04 00:00 |
06:01:29.43 |
+13:40:47.0 |
HIP 28620 |
27.75 |
| 2026-02-04 12:00 |
06:01:24.80 |
+13:41:08.7 |
HIP 28620 |
28.67 |
| 2026-02-05 00:00 |
06:01:20.21 |
+13:41:30.5 |
HIP 28345 |
28.71 |
| 2026-02-05 12:00 |
06:01:15.67 |
+13:41:52.4 |
HIP 28345 |
27.57 |
| 2026-02-06 00:00 |
06:01:11.17 |
+13:42:14.4 |
HIP 28345 |
26.46 |
| 2026-02-06 12:00 |
06:01:06.72 |
+13:42:36.5 |
HIP 28345 |
25.35 |
| 2026-02-07 00:00 |
06:01:02.31 |
+13:42:58.6 |
HIP 28345 |
24.27 |
| 2026-02-07 12:00 |
06:00:57.95 |
+13:43:20.7 |
HIP 28345 |
23.19 |
| 2026-02-08 00:00 |
06:00:53.63 |
+13:43:43.0 |
HIP 28345 |
22.13 |
| 2026-02-08 12:00 |
06:00:49.36 |
+13:44:05.3 |
HIP 28345 |
21.09 |
| 2026-02-09 00:00 |
06:00:45.14 |
+13:44:27.7 |
HIP 28345 |
20.07 |
| 2026-02-09 12:00 |
06:00:40.96 |
+13:44:50.1 |
HIP 28345 |
19.07 |
| 2026-02-10 00:00 |
06:00:36.84 |
+13:45:12.6 |
HIP 28345 |
18.08 |
| 2026-02-10 12:00 |
06:00:32.76 |
+13:45:35.2 |
HIP 28345 |
17.12 |
| 2026-02-11 00:00 |
06:00:28.72 |
+13:45:57.8 |
HIP 28345 |
16.19 |
| 2026-02-11 12:00 |
06:00:24.74 |
+13:46:20.5 |
HIP 28345 |
15.27 |
| 2026-02-12 00:00 |
06:00:20.80 |
+13:46:43.3 |
HIP 28345 |
14.39 |
| 2026-02-12 12:00 |
06:00:16.92 |
+13:47:06.1 |
HIP 28345 |
13.54 |
| 2026-02-13 00:00 |
06:00:13.08 |
+13:47:28.9 |
HIP 28345 |
12.73 |
| 2026-02-13 12:00 |
06:00:09.29 |
+13:47:51.9 |
HIP 28345 |
11.96 |
| 2026-02-14 00:00 |
06:00:05.55 |
+13:48:14.8 |
HIP 28345 |
11.24 |
| 2026-02-14 12:00 |
06:00:01.86 |
+13:48:37.9 |
HIP 28345 |
10.57 |
| 2026-02-15 00:00 |
05:59:58.22 |
+13:49:00.9 |
HIP 28345 |
9.96 |
| 2026-02-15 12:00 |
05:59:54.63 |
+13:49:24.1 |
HIP 28345 |
9.42 |
| 2026-02-16 00:00 |
05:59:51.09 |
+13:49:47.2 |
HIP 28345 |
8.96 |
| 2026-02-16 12:00 |
05:59:47.60 |
+13:50:10.5 |
HIP 28345 |
8.59 |
| 2026-02-17 00:00 |
05:59:44.17 |
+13:50:33.8 |
HIP 28345 |
8.32 |
| 2026-02-17 12:00 |
05:59:40.78 |
+13:50:57.1 |
HIP 28345 |
8.15 |
| 2026-02-18 00:00 |
05:59:37.45 |
+13:51:20.4 |
HIP 28345 |
8.08 |
| 2026-02-18 12:00 |
05:59:34.16 |
+13:51:43.9 |
HIP 28345 |
8.12 |
| 2026-02-19 00:00 |
05:59:30.93 |
+13:52:07.3 |
HIP 28345 |
8.26 |
| 2026-02-19 12:00 |
05:59:27.76 |
+13:52:30.8 |
HIP 28345 |
8.49 |
| 2026-02-20 00:00 |
05:59:24.63 |
+13:52:54.3 |
HIP 28345 |
8.80 |
| 2026-02-20 12:00 |
05:59:21.56 |
+13:53:17.9 |
HIP 28345 |
9.18 |
| 2026-02-21 00:00 |
05:59:18.54 |
+13:53:41.5 |
HIP 28345 |
9.62 |
| 2026-02-21 12:00 |
05:59:15.57 |
+13:54:05.2 |
HIP 28345 |
10.11 |
| 2026-02-22 00:00 |
05:59:12.65 |
+13:54:28.9 |
HIP 28345 |
10.63 |
| 2026-02-22 12:00 |
05:59:09.79 |
+13:54:52.6 |
HIP 28345 |
11.19 |
| 2026-02-23 00:00 |
05:59:06.98 |
+13:55:16.3 |
HIP 28345 |
11.77 |
| 2026-02-23 12:00 |
05:59:04.23 |
+13:55:40.1 |
HIP 28345 |
12.37 |
| 2026-02-24 00:00 |
05:59:01.52 |
+13:56:03.9 |
HIP 28345 |
12.99 |