488P/NEAT-PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
488P/NEAT-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-02-25T20:27:35.637120Z |
| Orbit solution date (soln_date, UTC) |
2024-10-26T00:12:33Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
16.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2002-08-29T05:09:46.368000Z |
| Discovery magnitude (MPC) |
19.00 R |
| Discovery observatory (MPC) |
644 · Palomar Mountain/NEAT |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-04-27.0000000 |
| e |
0.55045765 |
| q (au) |
1.679899 |
| a (au) |
3.736909 |
| i (deg) |
11.366619 |
| Ω (om, deg) |
324.110333 |
| ω (w, deg) |
1.302662 |
| M (ma, deg) |
157.742457 |
等級
散乱 + 全体線形
$$
M_a = (15.185 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.185 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
06:50:32.34 |
+31:17:14.1 |
HIP 32651 |
24.10 |
| 2026-02-03 12:00 |
06:50:14.12 |
+31:16:29.6 |
HIP 32651 |
20.18 |
| 2026-02-04 00:00 |
06:49:56.13 |
+31:15:44.5 |
HIP 32651 |
16.34 |
| 2026-02-04 12:00 |
06:49:38.39 |
+31:14:58.6 |
HIP 32651 |
12.59 |
| 2026-02-05 00:00 |
06:49:20.88 |
+31:14:12.1 |
HIP 32651 |
8.99 |
| 2026-02-05 12:00 |
06:49:03.63 |
+31:13:24.9 |
HIP 32651 |
5.74 |
| 2026-02-06 00:00 |
06:48:46.61 |
+31:12:37.0 |
HIP 32651 |
3.71 |
| 2026-02-06 12:00 |
06:48:29.85 |
+31:11:48.4 |
HIP 32651 |
4.70 |
| 2026-02-07 00:00 |
06:48:13.34 |
+31:10:59.3 |
HIP 32651 |
7.55 |
| 2026-02-07 12:00 |
06:47:57.07 |
+31:10:09.5 |
HIP 32583 |
7.35 |
| 2026-02-08 00:00 |
06:47:41.06 |
+31:09:19.0 |
HIP 32583 |
7.28 |
| 2026-02-08 12:00 |
06:47:25.31 |
+31:08:28.0 |
HIP 32583 |
8.73 |
| 2026-02-09 00:00 |
06:47:09.81 |
+31:07:36.4 |
HIP 32583 |
11.06 |
| 2026-02-09 12:00 |
06:46:54.57 |
+31:06:44.2 |
HIP 32482 |
11.09 |
| 2026-02-10 00:00 |
06:46:39.59 |
+31:05:51.4 |
HIP 32482 |
11.82 |
| 2026-02-10 12:00 |
06:46:24.87 |
+31:04:58.0 |
HIP 32482 |
13.35 |
| 2026-02-11 00:00 |
06:46:10.42 |
+31:04:04.1 |
HIP 32482 |
15.41 |
| 2026-02-11 12:00 |
06:45:56.22 |
+31:03:09.7 |
HIP 32353 |
16.83 |
| 2026-02-12 00:00 |
06:45:42.29 |
+31:02:14.7 |
HIP 32353 |
14.45 |
| 2026-02-12 12:00 |
06:45:28.63 |
+31:01:19.2 |
HIP 32353 |
12.42 |
| 2026-02-13 00:00 |
06:45:15.24 |
+31:00:23.3 |
HIP 32353 |
10.89 |
| 2026-02-13 12:00 |
06:45:02.11 |
+30:59:26.8 |
HIP 32353 |
10.03 |
| 2026-02-14 00:00 |
06:44:49.26 |
+30:58:29.8 |
HIP 32353 |
9.99 |
| 2026-02-14 12:00 |
06:44:36.67 |
+30:57:32.4 |
HIP 32353 |
10.72 |
| 2026-02-15 00:00 |
06:44:24.36 |
+30:56:34.5 |
HIP 32353 |
12.05 |
| 2026-02-15 12:00 |
06:44:12.32 |
+30:55:36.1 |
HIP 32353 |
13.78 |
| 2026-02-16 00:00 |
06:44:00.55 |
+30:54:37.3 |
HIP 32353 |
15.74 |
| 2026-02-16 12:00 |
06:43:49.06 |
+30:53:38.1 |
HIP 32353 |
17.85 |
| 2026-02-17 00:00 |
06:43:37.84 |
+30:52:38.5 |
HIP 32353 |
20.02 |
| 2026-02-17 12:00 |
06:43:26.89 |
+30:51:38.4 |
HIP 32353 |
22.23 |
| 2026-02-18 00:00 |
06:43:16.23 |
+30:50:38.0 |
HIP 32050 |
21.34 |
| 2026-02-18 12:00 |
06:43:05.84 |
+30:49:37.2 |
HIP 32050 |
18.89 |
| 2026-02-19 00:00 |
06:42:55.72 |
+30:48:36.0 |
HIP 32050 |
16.50 |
| 2026-02-19 12:00 |
06:42:45.89 |
+30:47:34.4 |
HIP 32050 |
14.15 |
| 2026-02-20 00:00 |
06:42:36.33 |
+30:46:32.5 |
HIP 32050 |
11.85 |
| 2026-02-20 12:00 |
06:42:27.05 |
+30:45:30.2 |
HIP 32050 |
9.60 |
| 2026-02-21 00:00 |
06:42:18.05 |
+30:44:27.6 |
HIP 32050 |
7.41 |
| 2026-02-21 12:00 |
06:42:09.32 |
+30:43:24.6 |
HIP 32050 |
5.26 |
| 2026-02-22 00:00 |
06:42:00.88 |
+30:42:21.4 |
HIP 32050 |
3.17 |
| 2026-02-22 12:00 |
06:41:52.71 |
+30:41:17.8 |
HIP 32050 |
1.15 |
| 2026-02-23 00:00 |
06:41:44.82 |
+30:40:13.9 |
HIP 32050 |
0.99 |
| 2026-02-23 12:00 |
06:41:37.21 |
+30:39:09.8 |
HIP 32050 |
2.90 |
| 2026-02-24 00:00 |
06:41:29.88 |
+30:38:05.3 |
HIP 32050 |
4.80 |