C/2016 S1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2016 S1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-03-16T19:29:49.666560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
127 |
| NEO |
- |
| M1 |
5.700 |
| K1 |
24.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-11-07.0000000 |
| e |
0.70884778 |
| q (au) |
2.411908 |
| a (au) |
8.284009 |
| i (deg) |
94.689671 |
| Ω (om, deg) |
227.538223 |
| ω (w, deg) |
273.611282 |
| M (ma, deg) |
354.633893 |
等級
散乱 + 全体線形
$$
M_a = (9.502 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.502 |
| n |
6.000 |
| gf |
0.926 |
| gb |
-0.858 |
| k |
0.992 |
| δ90 |
8.697 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
17:11:18.17 |
+60:06:34.8 |
HIP 83696 |
48.39 |
| 2026-02-03 12:00 |
17:11:29.74 |
+60:08:39.5 |
HIP 83696 |
48.16 |
| 2026-02-04 00:00 |
17:11:41.20 |
+60:10:44.8 |
HIP 84465 |
45.68 |
| 2026-02-04 12:00 |
17:11:52.55 |
+60:12:50.7 |
HIP 84465 |
43.20 |
| 2026-02-05 00:00 |
17:12:03.81 |
+60:14:57.2 |
HIP 84465 |
40.73 |
| 2026-02-05 12:00 |
17:12:14.95 |
+60:17:04.3 |
HIP 84465 |
38.27 |
| 2026-02-06 00:00 |
17:12:26.00 |
+60:19:12.1 |
HIP 84465 |
35.83 |
| 2026-02-06 12:00 |
17:12:36.93 |
+60:21:20.3 |
HIP 84465 |
33.40 |
| 2026-02-07 00:00 |
17:12:47.76 |
+60:23:29.2 |
HIP 84465 |
31.00 |
| 2026-02-07 12:00 |
17:12:58.49 |
+60:25:38.6 |
HIP 84465 |
28.63 |
| 2026-02-08 00:00 |
17:13:09.10 |
+60:27:48.7 |
HIP 84465 |
26.29 |
| 2026-02-08 12:00 |
17:13:19.60 |
+60:29:59.2 |
HIP 84465 |
24.00 |
| 2026-02-09 00:00 |
17:13:29.99 |
+60:32:10.3 |
HIP 84465 |
21.78 |
| 2026-02-09 12:00 |
17:13:40.27 |
+60:34:22.0 |
HIP 84465 |
19.64 |
| 2026-02-10 00:00 |
17:13:50.43 |
+60:36:34.2 |
HIP 84465 |
17.62 |
| 2026-02-10 12:00 |
17:14:00.48 |
+60:38:46.9 |
HIP 84465 |
15.76 |
| 2026-02-11 00:00 |
17:14:10.42 |
+60:41:00.1 |
HIP 84465 |
14.12 |
| 2026-02-11 12:00 |
17:14:20.24 |
+60:43:13.9 |
HIP 84465 |
12.80 |
| 2026-02-12 00:00 |
17:14:29.94 |
+60:45:28.2 |
HIP 84465 |
11.90 |
| 2026-02-12 12:00 |
17:14:39.53 |
+60:47:42.9 |
HIP 84465 |
11.51 |
| 2026-02-13 00:00 |
17:14:48.99 |
+60:49:58.2 |
HIP 84465 |
11.70 |
| 2026-02-13 12:00 |
17:14:58.34 |
+60:52:13.9 |
HIP 84465 |
12.42 |
| 2026-02-14 00:00 |
17:15:07.56 |
+60:54:30.2 |
HIP 84465 |
13.61 |
| 2026-02-14 12:00 |
17:15:16.66 |
+60:56:46.9 |
HIP 84465 |
15.14 |
| 2026-02-15 00:00 |
17:15:25.64 |
+60:59:04.0 |
HIP 84465 |
16.93 |
| 2026-02-15 12:00 |
17:15:34.49 |
+61:01:21.6 |
HIP 84465 |
18.90 |
| 2026-02-16 00:00 |
17:15:43.22 |
+61:03:39.7 |
HIP 84465 |
21.00 |
| 2026-02-16 12:00 |
17:15:51.83 |
+61:05:58.2 |
HIP 84465 |
23.20 |
| 2026-02-17 00:00 |
17:16:00.30 |
+61:08:17.1 |
HIP 84465 |
25.46 |
| 2026-02-17 12:00 |
17:16:08.65 |
+61:10:36.4 |
HIP 84465 |
27.78 |
| 2026-02-18 00:00 |
17:16:16.87 |
+61:12:56.2 |
HIP 84465 |
30.14 |
| 2026-02-18 12:00 |
17:16:24.96 |
+61:15:16.3 |
HIP 84465 |
32.53 |
| 2026-02-19 00:00 |
17:16:32.92 |
+61:17:36.9 |
HIP 84795 |
32.36 |
| 2026-02-19 12:00 |
17:16:40.75 |
+61:19:57.8 |
HIP 84795 |
30.12 |
| 2026-02-20 00:00 |
17:16:48.45 |
+61:22:19.1 |
HIP 84795 |
27.93 |
| 2026-02-20 12:00 |
17:16:56.01 |
+61:24:40.8 |
HIP 84795 |
25.82 |
| 2026-02-21 00:00 |
17:17:03.44 |
+61:27:02.8 |
HIP 84727 |
23.72 |
| 2026-02-21 12:00 |
17:17:10.73 |
+61:29:25.2 |
HIP 84727 |
21.35 |
| 2026-02-22 00:00 |
17:17:17.89 |
+61:31:47.9 |
HIP 84727 |
19.01 |
| 2026-02-22 12:00 |
17:17:24.91 |
+61:34:10.9 |
HIP 84727 |
16.75 |
| 2026-02-23 00:00 |
17:17:31.79 |
+61:36:34.3 |
HIP 84727 |
14.58 |
| 2026-02-23 12:00 |
17:17:38.54 |
+61:38:58.0 |
HIP 84727 |
12.57 |
| 2026-02-24 00:00 |
17:17:45.14 |
+61:41:21.9 |
HIP 84727 |
10.78 |