C/2011 Q1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2011 Q1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-06-29T10:55:01.718400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:54Z |
| Obs used |
59 |
| NEO |
- |
| M1 |
7.500 |
| 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) |
2011-09-21.0000000 |
| e |
0.99791265 |
| q (au) |
6.780085 |
| a (au) |
3248.185456 |
| i (deg) |
94.862014 |
| Ω (om, deg) |
142.243907 |
| ω (w, deg) |
135.926448 |
| M (ma, deg) |
0.000445 |
等級
散乱 + 全体線形
$$
M_a = (2.217 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.217 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.968 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
03:24:48.70 |
-76:39:13.8 |
HIP 15994 |
4.78 |
| 2026-02-03 12:00 |
03:24:48.10 |
-76:38:11.7 |
HIP 15994 |
4.43 |
| 2026-02-04 00:00 |
03:24:47.66 |
-76:37:09.5 |
HIP 15994 |
4.29 |
| 2026-02-04 12:00 |
03:24:47.37 |
-76:36:07.3 |
HIP 15994 |
4.39 |
| 2026-02-05 00:00 |
03:24:47.23 |
-76:35:05.0 |
HIP 15994 |
4.71 |
| 2026-02-05 12:00 |
03:24:47.25 |
-76:34:02.6 |
HIP 15994 |
5.22 |
| 2026-02-06 00:00 |
03:24:47.41 |
-76:33:00.2 |
HIP 15994 |
5.86 |
| 2026-02-06 12:00 |
03:24:47.72 |
-76:31:57.8 |
HIP 15994 |
6.60 |
| 2026-02-07 00:00 |
03:24:48.19 |
-76:30:55.3 |
HIP 15994 |
7.41 |
| 2026-02-07 12:00 |
03:24:48.80 |
-76:29:52.7 |
HIP 15994 |
8.26 |
| 2026-02-08 00:00 |
03:24:49.56 |
-76:28:50.1 |
HIP 15994 |
9.15 |
| 2026-02-08 12:00 |
03:24:50.47 |
-76:27:47.5 |
HIP 15994 |
10.07 |
| 2026-02-09 00:00 |
03:24:51.53 |
-76:26:44.9 |
HIP 15994 |
11.01 |
| 2026-02-09 12:00 |
03:24:52.74 |
-76:25:42.2 |
HIP 15994 |
11.96 |
| 2026-02-10 00:00 |
03:24:54.09 |
-76:24:39.6 |
HIP 15994 |
12.93 |
| 2026-02-10 12:00 |
03:24:55.59 |
-76:23:36.9 |
HIP 15994 |
13.90 |
| 2026-02-11 00:00 |
03:24:57.24 |
-76:22:34.2 |
HIP 15994 |
14.89 |
| 2026-02-11 12:00 |
03:24:59.03 |
-76:21:31.5 |
HIP 15994 |
15.87 |
| 2026-02-12 00:00 |
03:25:00.97 |
-76:20:28.8 |
HIP 15994 |
16.87 |
| 2026-02-12 12:00 |
03:25:03.05 |
-76:19:26.2 |
HIP 15994 |
17.87 |
| 2026-02-13 00:00 |
03:25:05.28 |
-76:18:23.5 |
HIP 15994 |
18.87 |
| 2026-02-13 12:00 |
03:25:07.65 |
-76:17:20.8 |
HIP 15994 |
19.88 |
| 2026-02-14 00:00 |
03:25:10.17 |
-76:16:18.2 |
HIP 15994 |
20.89 |
| 2026-02-14 12:00 |
03:25:12.83 |
-76:15:15.6 |
HIP 15994 |
21.90 |
| 2026-02-15 00:00 |
03:25:15.63 |
-76:14:13.0 |
HIP 15994 |
22.92 |
| 2026-02-15 12:00 |
03:25:18.57 |
-76:13:10.5 |
HIP 15994 |
23.93 |
| 2026-02-16 00:00 |
03:25:21.65 |
-76:12:08.0 |
HIP 15994 |
24.95 |
| 2026-02-16 12:00 |
03:25:24.88 |
-76:11:05.5 |
HIP 15994 |
25.97 |
| 2026-02-17 00:00 |
03:25:28.24 |
-76:10:03.1 |
HIP 15994 |
26.99 |
| 2026-02-17 12:00 |
03:25:31.75 |
-76:09:00.8 |
HIP 15994 |
28.02 |
| 2026-02-18 00:00 |
03:25:35.39 |
-76:07:58.5 |
HIP 15994 |
29.04 |
| 2026-02-18 12:00 |
03:25:39.17 |
-76:06:56.2 |
HIP 15994 |
30.06 |
| 2026-02-19 00:00 |
03:25:43.09 |
-76:05:54.1 |
HIP 15994 |
31.09 |
| 2026-02-19 12:00 |
03:25:47.14 |
-76:04:52.0 |
HIP 15994 |
32.12 |
| 2026-02-20 00:00 |
03:25:51.33 |
-76:03:50.0 |
HIP 15994 |
33.15 |
| 2026-02-20 12:00 |
03:25:55.66 |
-76:02:48.0 |
HIP 15994 |
34.17 |
| 2026-02-21 00:00 |
03:26:00.12 |
-76:01:46.2 |
HIP 15994 |
35.20 |
| 2026-02-21 12:00 |
03:26:04.71 |
-76:00:44.4 |
HIP 15994 |
36.23 |
| 2026-02-22 00:00 |
03:26:09.44 |
-75:59:42.7 |
HIP 15994 |
37.26 |
| 2026-02-22 12:00 |
03:26:14.30 |
-75:58:41.2 |
HIP 15994 |
38.29 |
| 2026-02-23 00:00 |
03:26:19.29 |
-75:57:39.7 |
HIP 15994 |
39.33 |
| 2026-02-23 12:00 |
03:26:24.41 |
-75:56:38.3 |
HIP 15994 |
40.36 |
| 2026-02-24 00:00 |
03:26:29.66 |
-75:55:37.1 |
HIP 15782 |
40.32 |