# Updated start date to one\_snap\_v4.0 baseline?

**URL:** <https://www.rubin.community/t/updated-start-date-to-one-snap-v4-0-baseline/9732>\
**Category:** Survey Strategy\
**Created:** [January 21, 2025, 12:27pm UTC](https://www.rubin.community/t/updated-start-date-to-one-snap-v4-0-baseline/9732 "2025-01-21T12:27:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![astjoephysics](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/astjoephysics/32/2678_2.png) [@astjoephysics](https://www.rubin.community/u/astjoephysics)\
**Post date:** [January 21, 2025, 12:27pm UTC](https://www.rubin.community/t/updated-start-date-to-one-snap-v4-0-baseline/9732/1 "2025-01-21T12:27:31Z")

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Hi, it’s my understanding that the start date for the one\_snap\_v4.0 simulations is May 2025, which I imagine is unrealistic at this stage. Is there a possibility that these simulations can be updated to the expected most probable start time - this matters for understanding when some solar system objects that are highly localised on-sky would actually most likely be detected by the LSST. Thanks!

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**Author:** ![yoachim](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/yoachim/32/74_2.png) [@yoachim](https://www.rubin.community/u/yoachim)\
**Post date:** [January 21, 2025, 6:55pm UTC](https://www.rubin.community/t/updated-start-date-to-one-snap-v4-0-baseline/9732/2 "2025-01-21T18:55:21Z")

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Not officially released yet (so no guarantee it won’t change) here’s a link to the bleeding edge simulation with the most recent expected start date (Nov 1, 2025): [https://s3df.slac.stanford.edu/data/rubin/sim-data/sims\_featureScheduler\_runs4.2/baseline/baseline\_v4.2\_10yrs.db](https://s3df.slac.stanford.edu/data/rubin/sim-data/sims_featureScheduler_runs4.2/baseline/baseline_v4.2_10yrs.db)