I read SCOC recommendations #1 pstn-053, #2 pstn-055 and #3 (last one) pstn-056 (@fed)
And especially pstn-055 section 2.4 intra-night cadence and section 2.4.1 SCOC recommendations : executive summary. ( I didn’t see anything in #3, so it hasn’t been invalidated and that should be how it would work from the beginning of the survey ?)
Can someone confirm to me that we really will do not only 30-minutes tracklets, but also triplets?
From what I read (but I am a complete amateur) there should be, at least for the WFD but not in the galactic plane, a third visit after 24 hrs and/or a triplet done every 7 nights, with the third visit made with a time gap of 2-7 hours (randomly) from the second image of the tracklet.
And from the beginning of the survey.
Is that correct ?
That would be very useful to detect distant TNOs, but not enough distant like for example the hypothetical Planet 9 (distance 800AU) that is so far and so slow motion rate, that it won’t need triplets. Just tracklets of 3 nights time gap (the normal cadence) would already be ok (motion rate of only few arcseconds).
But TNOs in between (80 to 500 AU distance) would be too slow for short 30’-tracklets but maybe also too fast for tracklets of several nights (on-sky motion of >1’ is maybe too much ? And would be an issue for tracking/linking ? I don’t know ! It’s an idea I have !)
But anyway, with the adoption of that strategy it would be ok for those objects which need more than 1hr time gap to move at least 1’’ and have their movement detected ! And with a third visit after 2-7 hrs it would be ok for their detection… isn’t it ?
Please tell me what you think !
Has this proposition of strategy been definitely adopted ? (I think that was the last SCOC recommendation (#3) before the launch !)
Anyone from the SCOC ? Or other? To tell me if I’m not mistaken ?
Thanks
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