メタデータ
| 項目 |
値 |
| Designation |
334P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-05-19T03:35:22.182720Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:41Z |
| Obs used |
404 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
15.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-10-20.0000000 |
| e |
0.35453120 |
| q (au) |
4.187661 |
| a (au) |
6.487782 |
| i (deg) |
19.057080 |
| Ω (om, deg) |
92.783588 |
| ω (w, deg) |
81.094516 |
| M (ma, deg) |
216.668886 |
等級
散乱 + 全体線形
$$
M_a = (6.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.000 |
| n |
6.000 |
| gf |
0.913 |
| gb |
-0.905 |
| k |
1.000 |
| δ90 |
6.383 |
| 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 |
| 2016-01-07 |
2017-05-18 |
+13.7114 |
-8.331 |
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 |
00:29:35.05 |
-16:54:28.4 |
HIP 2274 |
19.97 |
| 2026-03-26 12:00 |
00:29:49.17 |
-16:53:00.7 |
HIP 2463 |
21.66 |
| 2026-03-27 00:00 |
00:30:03.29 |
-16:51:33.3 |
HIP 2463 |
18.04 |
| 2026-03-27 12:00 |
00:30:17.41 |
-16:50:06.5 |
HIP 2463 |
14.45 |
| 2026-03-28 00:00 |
00:30:31.53 |
-16:48:40.0 |
HIP 2463 |
10.91 |
| 2026-03-28 12:00 |
00:30:45.65 |
-16:47:14.0 |
HIP 2463 |
7.50 |
| 2026-03-29 00:00 |
00:30:59.77 |
-16:45:48.4 |
HIP 2463 |
4.51 |
| 2026-03-29 12:00 |
00:31:13.89 |
-16:44:23.3 |
HIP 2463 |
3.36 |
| 2026-03-30 00:00 |
00:31:28.01 |
-16:42:58.6 |
HIP 2463 |
5.39 |
| 2026-03-30 12:00 |
00:31:42.12 |
-16:41:34.3 |
HIP 2463 |
8.58 |
| 2026-03-31 00:00 |
00:31:56.24 |
-16:40:10.5 |
HIP 2463 |
12.04 |
| 2026-03-31 12:00 |
00:32:10.35 |
-16:38:47.1 |
HIP 2463 |
15.58 |
| 2026-04-01 00:00 |
00:32:24.46 |
-16:37:24.2 |
HIP 2634 |
17.60 |
| 2026-04-01 12:00 |
00:32:38.57 |
-16:36:01.8 |
HIP 2634 |
14.03 |
| 2026-04-02 00:00 |
00:32:52.67 |
-16:34:39.8 |
HIP 2634 |
10.50 |
| 2026-04-02 12:00 |
00:33:06.77 |
-16:33:18.2 |
HIP 2634 |
7.12 |
| 2026-04-03 00:00 |
00:33:20.86 |
-16:31:57.1 |
HIP 2634 |
4.18 |
| 2026-04-03 12:00 |
00:33:34.95 |
-16:30:36.5 |
HIP 2634 |
3.30 |
| 2026-04-04 00:00 |
00:33:49.03 |
-16:29:16.4 |
HIP 2634 |
5.54 |
| 2026-04-04 12:00 |
00:34:03.11 |
-16:27:56.7 |
HIP 2634 |
8.77 |
| 2026-04-05 00:00 |
00:34:17.18 |
-16:26:37.5 |
HIP 2634 |
12.22 |
| 2026-04-05 12:00 |
00:34:31.24 |
-16:25:18.8 |
HIP 2634 |
15.74 |
| 2026-04-06 00:00 |
00:34:45.29 |
-16:24:00.6 |
HIP 2819 |
18.84 |
| 2026-04-06 12:00 |
00:34:59.34 |
-16:22:42.8 |
HIP 2819 |
16.95 |
| 2026-04-07 00:00 |
00:35:13.37 |
-16:21:25.6 |
HIP 2819 |
15.66 |
| 2026-04-07 12:00 |
00:35:27.40 |
-16:20:08.8 |
HIP 2819 |
15.13 |
| 2026-04-08 00:00 |
00:35:41.41 |
-16:18:52.5 |
HIP 2819 |
15.44 |
| 2026-04-08 12:00 |
00:35:55.42 |
-16:17:36.7 |
HIP 2819 |
16.53 |
| 2026-04-09 00:00 |
00:36:09.42 |
-16:16:21.5 |
HIP 2819 |
18.27 |
| 2026-04-09 12:00 |
00:36:23.40 |
-16:15:06.7 |
HIP 2819 |
20.48 |
| 2026-04-10 00:00 |
00:36:37.37 |
-16:13:52.4 |
HIP 3002 |
22.65 |
| 2026-04-10 12:00 |
00:36:51.33 |
-16:12:38.7 |
HIP 3002 |
19.40 |
| 2026-04-11 00:00 |
00:37:05.28 |
-16:11:25.4 |
HIP 3002 |
16.28 |
| 2026-04-11 12:00 |
00:37:19.21 |
-16:10:12.7 |
HIP 3002 |
13.38 |
| 2026-04-12 00:00 |
00:37:33.13 |
-16:09:00.5 |
HIP 3002 |
10.87 |
| 2026-04-12 12:00 |
00:37:47.04 |
-16:07:48.8 |
HIP 3002 |
9.09 |
| 2026-04-13 00:00 |
00:38:00.93 |
-16:06:37.7 |
HIP 3002 |
8.48 |
| 2026-04-13 12:00 |
00:38:14.80 |
-16:05:27.0 |
HIP 3002 |
9.29 |
| 2026-04-14 00:00 |
00:38:28.66 |
-16:04:17.0 |
HIP 3002 |
11.19 |
| 2026-04-14 12:00 |
00:38:42.50 |
-16:03:07.4 |
HIP 3002 |
13.74 |
| 2026-04-15 00:00 |
00:38:56.32 |
-16:01:58.4 |
HIP 3002 |
16.64 |
| 2026-04-15 12:00 |
00:39:10.13 |
-16:00:49.9 |
HIP 3002 |
19.74 |
| 2026-04-16 00:00 |
00:39:23.92 |
-15:59:42.0 |
HIP 3047 |
22.13 |