ULAs Vulcan rocket sits at the pad at Space Launch Complex 41 (SLC-41) ahead of the start of a wet dress rehearsal tanking test on Friday, Dec. 8, 2023. Image: ULA
The debut of United Launch Alliances Vulcan rocket may slip from late December into early January, according to the companys president and CEO, Tory Bruno. In a social media post on Sunday, Bruno said the planned Dec. 24 launch date is likely out.
The statement comes a couple days after the rocket conducted a Wet Dress Rehearsal (WDR), where the vehicle was fully fueled and went the countdown was to proceed to the final seconds before cutting off. But Bruno said a couple of routine ground issues came up near the end of the test.
Ground teams were targeting a T-0 of 4:30 p.m. EST on Friday. Based on observations of venting during the operation it appeared the countdown reached its final four minutes before an abort occurred. The Vulcan vehicle left the launch pad and returned to the Vertical Integration Facility building at launch complex 41 Saturday afternoon.
Id like a full WDR before our first flight, so [Christmas] Eve is likely out, Bruno said in his post on X. He added that they are working on schedules but Spaceflight Now understands another test has been scheduled for as soon as Tuesday.
The primary payload onboard is Astrobotics Peregrine lunar lander, which will journey to the Moon. If the launch is able to happen during the December launch window (Dec. 24-26), the lander would touch down on the Moons surface at approximately 3:30 a.m. EST (0830 UTC) on Jan. 25, 2024.
Bruno said that the next launch window based on Peregrines needs opens on Jan. 8, 2024 and would likely last for four days. Dan Hendrickson, Astrobotics Vice President of Business Development, told Spaceflight Now back in October that the nominal time from launch to landing is between 30 and 39 days. It was not immediately clear if there is a different transit time for the early January launch window.
Shifting Moon race
With the launch potentially shifting to January, that changes the landscape for Moon-bound missions. Liftoff on Jan. 8 would mean Peregrine would launch just four days before the opening of the launch window for Intuitive Machines Nova-C lander onboard a SpaceX Falcon 9 rocket.
The Japanese Aerospace Exploration Agencys (JAXA) Smart Lander for Investigating Moon (SLIM) is also making its way to the Moon and is set to land around 1520 UTC on Jan. 19.
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