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) |
| 2026-03-26 00:00 |
21:27:11.70 |
+16:56:54.0 |
HIP 106058 |
34.33 |
| 2026-03-26 12:00 |
21:27:14.27 |
+16:57:39.3 |
HIP 106058 |
33.37 |
| 2026-03-27 00:00 |
21:27:16.81 |
+16:58:24.7 |
HIP 106058 |
32.41 |
| 2026-03-27 12:00 |
21:27:19.31 |
+16:59:10.2 |
HIP 106058 |
31.46 |
| 2026-03-28 00:00 |
21:27:21.79 |
+16:59:55.8 |
HIP 106058 |
30.51 |
| 2026-03-28 12:00 |
21:27:24.24 |
+17:00:41.5 |
HIP 106058 |
29.56 |
| 2026-03-29 00:00 |
21:27:26.67 |
+17:01:27.3 |
HIP 106058 |
28.63 |
| 2026-03-29 12:00 |
21:27:29.06 |
+17:02:13.2 |
HIP 106058 |
27.69 |
| 2026-03-30 00:00 |
21:27:31.42 |
+17:02:59.3 |
HIP 106058 |
26.77 |
| 2026-03-30 12:00 |
21:27:33.75 |
+17:03:45.3 |
HIP 106058 |
25.84 |
| 2026-03-31 00:00 |
21:27:36.06 |
+17:04:31.5 |
HIP 106058 |
24.93 |
| 2026-03-31 12:00 |
21:27:38.33 |
+17:05:17.8 |
HIP 106058 |
24.02 |
| 2026-04-01 00:00 |
21:27:40.57 |
+17:06:04.2 |
HIP 106058 |
23.12 |
| 2026-04-01 12:00 |
21:27:42.79 |
+17:06:50.6 |
HIP 106058 |
22.23 |
| 2026-04-02 00:00 |
21:27:44.97 |
+17:07:37.1 |
HIP 106058 |
21.35 |
| 2026-04-02 12:00 |
21:27:47.12 |
+17:08:23.7 |
HIP 106058 |
20.48 |
| 2026-04-03 00:00 |
21:27:49.24 |
+17:09:10.4 |
HIP 106058 |
19.62 |
| 2026-04-03 12:00 |
21:27:51.33 |
+17:09:57.1 |
HIP 106058 |
18.77 |
| 2026-04-04 00:00 |
21:27:53.39 |
+17:10:44.0 |
HIP 106058 |
17.94 |
| 2026-04-04 12:00 |
21:27:55.41 |
+17:11:30.8 |
HIP 106058 |
17.12 |
| 2026-04-05 00:00 |
21:27:57.41 |
+17:12:17.8 |
HIP 106058 |
16.31 |
| 2026-04-05 12:00 |
21:27:59.37 |
+17:13:04.8 |
HIP 106058 |
15.53 |
| 2026-04-06 00:00 |
21:28:01.30 |
+17:13:51.9 |
HIP 106058 |
14.76 |
| 2026-04-06 12:00 |
21:28:03.19 |
+17:14:39.0 |
HIP 106058 |
14.02 |
| 2026-04-07 00:00 |
21:28:05.06 |
+17:15:26.2 |
HIP 106058 |
13.31 |
| 2026-04-07 12:00 |
21:28:06.89 |
+17:16:13.4 |
HIP 106058 |
12.63 |
| 2026-04-08 00:00 |
21:28:08.69 |
+17:17:00.7 |
HIP 106058 |
11.99 |
| 2026-04-08 12:00 |
21:28:10.46 |
+17:17:48.1 |
HIP 106058 |
11.39 |
| 2026-04-09 00:00 |
21:28:12.19 |
+17:18:35.5 |
HIP 106058 |
10.83 |
| 2026-04-09 12:00 |
21:28:13.89 |
+17:19:22.9 |
HIP 106058 |
10.34 |
| 2026-04-10 00:00 |
21:28:15.55 |
+17:20:10.3 |
HIP 106058 |
9.90 |
| 2026-04-10 12:00 |
21:28:17.18 |
+17:20:57.8 |
HIP 106058 |
9.54 |
| 2026-04-11 00:00 |
21:28:18.78 |
+17:21:45.4 |
HIP 106058 |
9.25 |
| 2026-04-11 12:00 |
21:28:20.34 |
+17:22:32.9 |
HIP 106058 |
9.05 |
| 2026-04-12 00:00 |
21:28:21.87 |
+17:23:20.5 |
HIP 106058 |
8.94 |
| 2026-04-12 12:00 |
21:28:23.37 |
+17:24:08.1 |
HIP 106058 |
8.92 |
| 2026-04-13 00:00 |
21:28:24.82 |
+17:24:55.8 |
HIP 106058 |
9.00 |
| 2026-04-13 12:00 |
21:28:26.25 |
+17:25:43.4 |
HIP 106058 |
9.16 |
| 2026-04-14 00:00 |
21:28:27.64 |
+17:26:31.1 |
HIP 106058 |
9.40 |
| 2026-04-14 12:00 |
21:28:28.99 |
+17:27:18.8 |
HIP 106058 |
9.72 |
| 2026-04-15 00:00 |
21:28:30.31 |
+17:28:06.5 |
HIP 106058 |
10.12 |
| 2026-04-15 12:00 |
21:28:31.59 |
+17:28:54.2 |
HIP 106058 |
10.57 |
| 2026-04-16 00:00 |
21:28:32.83 |
+17:29:41.9 |
HIP 106058 |
11.07 |