Some questions about Alpha Centauri.关于南门二恒星系统的问题。

[Arp273]

Dear Space Engineers! I have a question about Alpha Centauri. I've looked up a lot of information and concluded that Alpha Centauri A, Alpha Centauri B and Proxima together form a triple star system, but in Space Engine only the binary star system consisting of Alpha Centauri A and Alpha Centauri B is presented, and Proxima is not included to present a triple star system. Why is this?亲爱的工程师们你们好！我有关于南门二恒星系统的疑问。我查了很多资料得出结论，南门二A、南门二B 和比邻星共同组成一个三合星系统，但是在Space Engine中只呈现了由南门二A和南门二B组成的双星系统，而没有把比邻星包含进去进而呈现三星系统。请问这是为什么呢？

[K1ltu]

Hey, thanks for pointing this out. The reason you don't see Proxima included with Alpha Centauri is that Proxima is about 0.24 light-years away. This distance makes it a bit difficult to include them all in one frame, so Proxima has its own listing however it is in the correct location. We will look into updating the catalog so it is linked in the gui.

[HarbingerDawn]

The full technical explanation is that the orbital positions of objects in SE are calculated relative to the system barycenter with 64-bit precision. This means that objects extremely far from the barycenter will jitter significantly due to the limited precision in calculating their positions. For a system the size of Alpha Centauri, that would make it nearly impossible to fly to the surfaces of objects in the system since they would shift position significantly during each frame.