On Tuesday, Oct. 12, Jeff Bezos-owned Blue Origin will send its second round of space tourists into orbit.

Chris Boshuizen, co-founder of Earth observation company Planet Labs, and Glen de Vries, vice chair for life sciences and healthcare at French software company Dassault Systèmes, will be two of the four crewmembers, the company announced.

Blue Origin said in a statement that the remaining two crew members will be announced in the coming days.

According to a Blue Origin representative, both Boshuizen and de Vries participated in the charity auction for a ticket on Blue Origin's inaugural trip earlier this year.

Blue Origin announced in July that the winner would be unable to fly with Bezos on July 20 due to a schedule difficulty.

Neither Boshuizen nor de Vries were the auction winners, the company said, but further information on the high bidder will be released soon.

The NS-18 mission, the 18th flight overall for the New Shepard rocket, will lift off from Blue Origin's Launch Site One in West Texas at 9:30 a.m. EDT (8:30 a.m. CDT or 1330 GMT) on Oct. 12.

At an altitude of around 60 miles, the capsule with the crew on board will cross the so-called Karman Line, the border between Earth's atmosphere and outer space, during the about 11-minute trip. The space tourists will experience around 3 minutes of weightlessness at around the peak altitude.

Thousands of postcards from Blue Origin's Club for the Future, which strives to inspire future generations to pursue careers in science, technology, engineering, and mathematics (STEM), will be carried on the voyage in addition to the four passengers.

Blue Origin's first human flight, which included Bezos, his brother Mark, aviation pioneer Wally Funk, and Blue Origin's first paying customer, Oliver Daemen, was a success on July 20.

The company is selling tickets on its website, but the price of its space excursions has yet to be revealed. However, it did say that it has sold $100 million in space tickets.

The flight will be livestreamed by Blue Origin, with coverage starting an hour before takeoff.