今天打开orbitron，更新下星历，发现北斗2A在里面了，高兴
，查了一下，在n2yo.com上也有了相关的信息，为了方便大家查看，我作了下简单的翻译，有什么不对的地方还请指正。
，e文好的可以直接读原文。
北美防空联合司令部编号：30323
编号：2007-003A
近地点：184 km
远地点：41471 km
倾斜度：25.1°
周期：744.3 min
发射时间：2007-02-02
归属国：中国
简介：北斗2A是中国在2007年02月02日16:28由长征-3号运载火箭在四川省西昌卫星发射中心发射的一颗导航试验卫星。她是将在2008年投入运行的北斗导航系统的第四可试验卫星。北斗2A将为海陆运输、灾难控制等方面提供定位。
原文如下：
NORAD ID: 30323
Int'l Code: 2007-003A
Perigee: 184 km
Apogee: 41471 km
Inclination: 25.1°
Period: 744.3 min
Launch date: 2007-02-02
Source: People's Republic of China (PRC)
Comments: Beidou 2A is a Chinese experimental navigational satellite that was launched by a Long March 3-A rocket from Xichang Satellite Launch Center in Sichuan Province at 16:28 UT on 02 February 2007. It is the fourth member of the experimental Beidou fleet, preparatory to a full-fledged Compass Navigation Satellite System (CNSS) to be established by 2008. Beidou 2A will provide locations for land- and sea-based transportation, and disaster management.
Int'l Code: 2007-003A
Perigee: 184 km
Apogee: 41471 km
Inclination: 25.1°
Period: 744.3 min
Launch date: 2007-02-02
Source: People's Republic of China (PRC)
Comments: Beidou 2A is a Chinese experimental navigational satellite that was launched by a Long March 3-A rocket from Xichang Satellite Launch Center in Sichuan Province at 16:28 UT on 02 February 2007. It is the fourth member of the experimental Beidou fleet, preparatory to a full-fledged Compass Navigation Satellite System (CNSS) to be established by 2008. Beidou 2A will provide locations for land- and sea-based transportation, and disaster management.
Two Line Element Set (TLE):
1 30323U 07003A 07109.14145470 -.00000315 00000-0 10000-3 0 1046
2 30323 006.3343 285.9043 0108102 275.3451 200.5694 01.00264669 1227
详细参数：
在轨情况
