C/2014 S1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2014 S1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-10-30T07:51:49.150080Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:31Z |
| Obs used |
45 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-10-25.0000000 |
| e |
1.00078324 |
| q (au) |
8.137341 |
| a (au) |
-10389.297965 |
| i (deg) |
123.804132 |
| Ω (om, deg) |
352.660639 |
| ω (w, deg) |
288.827322 |
| M (ma, deg) |
0.000335 |
等級
散乱 + 全体線形
$$
M_a = (10.556 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.556 |
| n |
2.000 |
| gf |
0.988 |
| gb |
-0.519 |
| k |
1.000 |
| 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 |
| 2014-01-14 |
2015-12-09 |
-160.7525 |
+148.263 |
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 |
21:21:10.20 |
+15:57:02.1 |
HIP 105211 |
41.88 |
| 2026-02-03 12:00 |
21:21:14.20 |
+15:57:23.9 |
HIP 105552 |
41.17 |
| 2026-02-04 00:00 |
21:21:18.19 |
+15:57:46.0 |
HIP 105552 |
40.39 |
| 2026-02-04 12:00 |
21:21:22.19 |
+15:58:08.4 |
HIP 105552 |
39.61 |
| 2026-02-05 00:00 |
21:21:26.19 |
+15:58:31.1 |
HIP 105552 |
38.84 |
| 2026-02-05 12:00 |
21:21:30.19 |
+15:58:54.2 |
HIP 105552 |
38.08 |
| 2026-02-06 00:00 |
21:21:34.19 |
+15:59:17.5 |
HIP 105552 |
37.33 |
| 2026-02-06 12:00 |
21:21:38.19 |
+15:59:41.2 |
HIP 105552 |
36.58 |
| 2026-02-07 00:00 |
21:21:42.19 |
+16:00:05.2 |
HIP 105552 |
35.85 |
| 2026-02-07 12:00 |
21:21:46.19 |
+16:00:29.5 |
HIP 105552 |
35.12 |
| 2026-02-08 00:00 |
21:21:50.19 |
+16:00:54.1 |
HIP 105583 |
34.39 |
| 2026-02-08 12:00 |
21:21:54.18 |
+16:01:19.1 |
HIP 105583 |
33.52 |
| 2026-02-09 00:00 |
21:21:58.18 |
+16:01:44.3 |
HIP 105583 |
32.66 |
| 2026-02-09 12:00 |
21:22:02.17 |
+16:02:09.9 |
HIP 105583 |
31.81 |
| 2026-02-10 00:00 |
21:22:06.17 |
+16:02:35.8 |
HIP 105583 |
30.97 |
| 2026-02-10 12:00 |
21:22:10.15 |
+16:03:01.9 |
HIP 105583 |
30.14 |
| 2026-02-11 00:00 |
21:22:14.14 |
+16:03:28.4 |
HIP 105583 |
29.31 |
| 2026-02-11 12:00 |
21:22:18.12 |
+16:03:55.2 |
HIP 105583 |
28.50 |
| 2026-02-12 00:00 |
21:22:22.10 |
+16:04:22.2 |
HIP 105583 |
27.70 |
| 2026-02-12 12:00 |
21:22:26.08 |
+16:04:49.6 |
HIP 105583 |
26.91 |
| 2026-02-13 00:00 |
21:22:30.05 |
+16:05:17.3 |
HIP 105583 |
26.14 |
| 2026-02-13 12:00 |
21:22:34.02 |
+16:05:45.3 |
HIP 105583 |
25.38 |
| 2026-02-14 00:00 |
21:22:37.98 |
+16:06:13.5 |
HIP 105583 |
24.64 |
| 2026-02-14 12:00 |
21:22:41.94 |
+16:06:42.1 |
HIP 105583 |
23.92 |
| 2026-02-15 00:00 |
21:22:45.89 |
+16:07:11.0 |
HIP 105583 |
23.23 |
| 2026-02-15 12:00 |
21:22:49.83 |
+16:07:40.1 |
HIP 105583 |
22.55 |
| 2026-02-16 00:00 |
21:22:53.77 |
+16:08:09.6 |
HIP 105583 |
21.91 |
| 2026-02-16 12:00 |
21:22:57.71 |
+16:08:39.3 |
HIP 105583 |
21.29 |
| 2026-02-17 00:00 |
21:23:01.63 |
+16:09:09.3 |
HIP 105583 |
20.70 |
| 2026-02-17 12:00 |
21:23:05.55 |
+16:09:39.6 |
HIP 105583 |
20.15 |
| 2026-02-18 00:00 |
21:23:09.46 |
+16:10:10.2 |
HIP 105583 |
19.64 |
| 2026-02-18 12:00 |
21:23:13.37 |
+16:10:41.0 |
HIP 105583 |
19.17 |
| 2026-02-19 00:00 |
21:23:17.26 |
+16:11:12.1 |
HIP 105583 |
18.74 |
| 2026-02-19 12:00 |
21:23:21.15 |
+16:11:43.5 |
HIP 105583 |
18.36 |
| 2026-02-20 00:00 |
21:23:25.03 |
+16:12:15.2 |
HIP 105583 |
18.03 |
| 2026-02-20 12:00 |
21:23:28.90 |
+16:12:47.2 |
HIP 105583 |
17.75 |
| 2026-02-21 00:00 |
21:23:32.75 |
+16:13:19.4 |
HIP 105583 |
17.53 |
| 2026-02-21 12:00 |
21:23:36.60 |
+16:13:51.9 |
HIP 105583 |
17.37 |
| 2026-02-22 00:00 |
21:23:40.44 |
+16:14:24.6 |
HIP 105583 |
17.27 |
| 2026-02-22 12:00 |
21:23:44.27 |
+16:14:57.6 |
HIP 105583 |
17.23 |
| 2026-02-23 00:00 |
21:23:48.09 |
+16:15:30.9 |
HIP 105583 |
17.25 |
| 2026-02-23 12:00 |
21:23:51.89 |
+16:16:04.4 |
HIP 105583 |
17.33 |
| 2026-02-24 00:00 |
21:23:55.69 |
+16:16:38.2 |
HIP 105583 |
17.47 |