511P/PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
511P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-07-10T18:48:54.316800Z |
| Orbit solution date (soln_date, UTC) |
2026-01-07T15:43:12Z |
| Obs used |
82 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
13.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-02-02.0000000 |
| e |
0.23766284 |
| q (au) |
2.295935 |
| a (au) |
3.011706 |
| i (deg) |
14.783286 |
| Ω (om, deg) |
271.031509 |
| ω (w, deg) |
81.163490 |
| M (ma, deg) |
261.038592 |
等級
散乱 + 全体線形
$$
M_a = (16.251 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.251 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.557 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
01:43:35.78 |
+20:21:03.0 |
HIP 7981 |
16.18 |
| 2026-02-03 12:00 |
01:44:19.85 |
+20:21:59.3 |
HIP 8159 |
18.97 |
| 2026-02-04 00:00 |
01:45:04.04 |
+20:22:56.8 |
HIP 8221 |
11.98 |
| 2026-02-04 12:00 |
01:45:48.35 |
+20:23:55.5 |
HIP 8221 |
5.47 |
| 2026-02-05 00:00 |
01:46:32.79 |
+20:24:55.3 |
HIP 8221 |
11.61 |
| 2026-02-05 12:00 |
01:47:17.35 |
+20:25:56.2 |
HIP 8412 |
18.83 |
| 2026-02-06 00:00 |
01:48:02.02 |
+20:26:58.3 |
HIP 8412 |
10.97 |
| 2026-02-06 12:00 |
01:48:46.82 |
+20:28:01.4 |
HIP 8412 |
10.38 |
| 2026-02-07 00:00 |
01:49:31.74 |
+20:29:05.7 |
HIP 8412 |
17.86 |
| 2026-02-07 12:00 |
01:50:16.77 |
+20:30:11.0 |
HIP 8592 |
10.05 |
| 2026-02-08 00:00 |
01:51:01.92 |
+20:31:17.3 |
HIP 8619 |
1.81 |
| 2026-02-08 12:00 |
01:51:47.19 |
+20:32:24.7 |
HIP 8619 |
8.97 |
| 2026-02-09 00:00 |
01:52:32.57 |
+20:33:33.1 |
HIP 8619 |
19.64 |
| 2026-02-09 12:00 |
01:53:18.06 |
+20:34:42.5 |
HIP 8903 |
23.30 |
| 2026-02-10 00:00 |
01:54:03.67 |
+20:35:52.8 |
HIP 8903 |
15.00 |
| 2026-02-10 12:00 |
01:54:49.39 |
+20:37:04.2 |
HIP 8903 |
11.72 |
| 2026-02-11 00:00 |
01:55:35.22 |
+20:38:16.4 |
HIP 8903 |
16.77 |
| 2026-02-11 12:00 |
01:56:21.16 |
+20:39:29.6 |
HIP 9107 |
20.55 |
| 2026-02-12 00:00 |
01:57:07.21 |
+20:40:43.7 |
HIP 9107 |
14.54 |
| 2026-02-12 12:00 |
01:57:53.37 |
+20:41:58.7 |
HIP 9107 |
15.33 |
| 2026-02-13 00:00 |
01:58:39.64 |
+20:43:14.6 |
HIP 9186 |
18.13 |
| 2026-02-13 12:00 |
01:59:26.01 |
+20:44:31.3 |
HIP 9307 |
19.13 |
| 2026-02-14 00:00 |
02:00:12.49 |
+20:45:48.9 |
HIP 9307 |
19.69 |
| 2026-02-14 12:00 |
02:00:59.08 |
+20:47:07.3 |
HIP 9307 |
25.47 |
| 2026-02-15 00:00 |
02:01:45.77 |
+20:48:26.6 |
HIP 9307 |
33.93 |
| 2026-02-15 12:00 |
02:02:32.56 |
+20:49:46.6 |
HIP 9674 |
29.30 |
| 2026-02-16 00:00 |
02:03:19.46 |
+20:51:07.4 |
HIP 9674 |
19.08 |
| 2026-02-16 12:00 |
02:04:06.45 |
+20:52:28.9 |
HIP 9674 |
10.62 |
| 2026-02-17 00:00 |
02:04:53.55 |
+20:53:51.2 |
HIP 9674 |
10.30 |
| 2026-02-17 12:00 |
02:05:40.74 |
+20:55:14.3 |
HIP 9674 |
18.59 |
| 2026-02-18 00:00 |
02:06:28.04 |
+20:56:38.0 |
HIP 9815 |
21.28 |
| 2026-02-18 12:00 |
02:07:15.43 |
+20:58:02.4 |
HIP 9815 |
26.43 |
| 2026-02-19 00:00 |
02:08:02.92 |
+20:59:27.6 |
HIP 9815 |
34.58 |
| 2026-02-19 12:00 |
02:08:50.50 |
+21:00:53.3 |
HIP 10216 |
38.67 |
| 2026-02-20 00:00 |
02:09:38.18 |
+21:02:19.7 |
HIP 10216 |
29.59 |
| 2026-02-20 12:00 |
02:10:25.95 |
+21:03:46.8 |
HIP 10216 |
22.54 |
| 2026-02-21 00:00 |
02:11:13.82 |
+21:05:14.4 |
HIP 10218 |
17.53 |
| 2026-02-21 12:00 |
02:12:01.78 |
+21:06:42.7 |
HIP 10306 |
12.31 |
| 2026-02-22 00:00 |
02:12:49.82 |
+21:08:11.5 |
HIP 10306 |
4.49 |
| 2026-02-22 12:00 |
02:13:37.96 |
+21:09:40.8 |
HIP 10306 |
12.02 |
| 2026-02-23 00:00 |
02:14:26.18 |
+21:11:10.8 |
HIP 10465 |
12.63 |
| 2026-02-23 12:00 |
02:15:14.49 |
+21:12:41.2 |
HIP 10465 |
13.22 |
| 2026-02-24 00:00 |
02:16:02.89 |
+21:14:12.1 |
HIP 10465 |
21.20 |