"Official" timeline

Is there an official timeline of the Frontier?<div><br /></div><div>I've been reading a ton of the available information while working on my 'Mystery of Starium' adventure, and cross referencing items.  Working on the adventure setting/timeline I noticed some date differences and was wondering if the SF community recognized an official timeline?</div><div><br /></div><div><div>From the Frontier timeline article in sfman #16, p44</div><div>Humans Arrive: 143pf  (what earth year did they leave, about 2150ad?)</div><div><br /></div><div>Cassidine Colonized: 115pf</div><div>Dixon's Star route mapped: 80pf</div><div><br /></div><div>Cassidine is discovered in 249pf in sfman #17, p71</div><div>Dixon's Star is colonized in 220pf in sfman #12, p45</div><div><br /></div></div><div>So is the Frontier timeline article in sfman #16 the official guideline?</div>