メタデータ
| 項目 |
値 |
| Designation |
C/2012 K1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-08-27T15:50:55.363200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:09Z |
| Obs used |
7829 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
6.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-02-09.0000000 |
| e |
1.00015292 |
| q (au) |
1.054597 |
| a (au) |
-6896.600671 |
| i (deg) |
142.428258 |
| Ω (om, deg) |
317.737649 |
| ω (w, deg) |
203.106601 |
| M (ma, deg) |
-0.000344 |
等級
散乱 + 全体線形
$$
M_a = (11.414 + 2.385\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.414 |
| n |
2.385 |
| gf |
1.000 |
| gb |
-0.794 |
| 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 |
| 2012-05-14 |
2014-07-17 |
+1.6909 |
-1.293 |
| 2014-08-31 |
2014-10-31 |
+17.6020 |
-4.109 |
| 2014-10-31 |
2016-08-07 |
+3.7225 |
-1.211 |
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) |
| 2026-06-01 00:00 |
21:25:41.94 |
-14:39:17.8 |
HIP 105782 |
23.03 |
| 2026-06-01 12:00 |
21:25:40.21 |
-14:39:23.4 |
HIP 105782 |
23.05 |
| 2026-06-02 00:00 |
21:25:38.44 |
-14:39:29.2 |
HIP 105782 |
23.08 |
| 2026-06-02 12:00 |
21:25:36.65 |
-14:39:35.1 |
HIP 105782 |
23.12 |
| 2026-06-03 00:00 |
21:25:34.82 |
-14:39:41.1 |
HIP 105782 |
23.17 |
| 2026-06-03 12:00 |
21:25:32.96 |
-14:39:47.4 |
HIP 105782 |
23.23 |
| 2026-06-04 00:00 |
21:25:31.06 |
-14:39:53.7 |
HIP 105782 |
23.30 |
| 2026-06-04 12:00 |
21:25:29.13 |
-14:40:00.3 |
HIP 105782 |
23.39 |
| 2026-06-05 00:00 |
21:25:27.17 |
-14:40:07.0 |
HIP 105782 |
23.48 |
| 2026-06-05 12:00 |
21:25:25.18 |
-14:40:13.8 |
HIP 105782 |
23.59 |
| 2026-06-06 00:00 |
21:25:23.15 |
-14:40:20.8 |
HIP 105782 |
23.71 |
| 2026-06-06 12:00 |
21:25:21.09 |
-14:40:28.0 |
HIP 105782 |
23.84 |
| 2026-06-07 00:00 |
21:25:19.00 |
-14:40:35.3 |
HIP 105782 |
23.99 |
| 2026-06-07 12:00 |
21:25:16.88 |
-14:40:42.7 |
HIP 105782 |
24.15 |
| 2026-06-08 00:00 |
21:25:14.72 |
-14:40:50.3 |
HIP 105782 |
24.32 |
| 2026-06-08 12:00 |
21:25:12.54 |
-14:40:58.1 |
HIP 105782 |
24.51 |
| 2026-06-09 00:00 |
21:25:10.32 |
-14:41:06.0 |
HIP 105782 |
24.71 |
| 2026-06-09 12:00 |
21:25:08.07 |
-14:41:14.1 |
HIP 105782 |
24.93 |
| 2026-06-10 00:00 |
21:25:05.78 |
-14:41:22.3 |
HIP 105782 |
25.16 |
| 2026-06-10 12:00 |
21:25:03.47 |
-14:41:30.6 |
HIP 105782 |
25.41 |
| 2026-06-11 00:00 |
21:25:01.13 |
-14:41:39.1 |
HIP 105782 |
25.67 |
| 2026-06-11 12:00 |
21:24:58.75 |
-14:41:47.8 |
HIP 105782 |
25.94 |
| 2026-06-12 00:00 |
21:24:56.34 |
-14:41:56.6 |
HIP 105782 |
26.23 |
| 2026-06-12 12:00 |
21:24:53.90 |
-14:42:05.5 |
HIP 105782 |
26.54 |
| 2026-06-13 00:00 |
21:24:51.43 |
-14:42:14.6 |
HIP 105782 |
26.85 |
| 2026-06-13 12:00 |
21:24:48.93 |
-14:42:23.9 |
HIP 105782 |
27.19 |
| 2026-06-14 00:00 |
21:24:46.40 |
-14:42:33.3 |
HIP 105782 |
27.54 |
| 2026-06-14 12:00 |
21:24:43.84 |
-14:42:42.8 |
HIP 105782 |
27.90 |
| 2026-06-15 00:00 |
21:24:41.25 |
-14:42:52.5 |
HIP 105782 |
28.28 |
| 2026-06-15 12:00 |
21:24:38.63 |
-14:43:02.3 |
HIP 105782 |
28.68 |
| 2026-06-16 00:00 |
21:24:35.97 |
-14:43:12.2 |
HIP 105782 |
29.08 |
| 2026-06-16 12:00 |
21:24:33.29 |
-14:43:22.3 |
HIP 105782 |
29.51 |
| 2026-06-17 00:00 |
21:24:30.58 |
-14:43:32.6 |
HIP 105782 |
29.94 |
| 2026-06-17 12:00 |
21:24:27.84 |
-14:43:42.9 |
HIP 105782 |
30.39 |
| 2026-06-18 00:00 |
21:24:25.07 |
-14:43:53.5 |
HIP 105782 |
30.86 |
| 2026-06-18 12:00 |
21:24:22.27 |
-14:44:04.1 |
HIP 105782 |
31.34 |
| 2026-06-19 00:00 |
21:24:19.45 |
-14:44:14.9 |
HIP 105519 |
31.67 |
| 2026-06-19 12:00 |
21:24:16.59 |
-14:44:25.8 |
HIP 105519 |
30.96 |
| 2026-06-20 00:00 |
21:24:13.71 |
-14:44:36.9 |
HIP 105519 |
30.24 |
| 2026-06-20 12:00 |
21:24:10.80 |
-14:44:48.0 |
HIP 105519 |
29.51 |
| 2026-06-21 00:00 |
21:24:07.86 |
-14:44:59.3 |
HIP 105519 |
28.78 |
| 2026-06-21 12:00 |
21:24:04.89 |
-14:45:10.8 |
HIP 105519 |
28.04 |
| 2026-06-22 00:00 |
21:24:01.90 |
-14:45:22.4 |
HIP 105519 |
27.30 |