Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org

From August 2025.

Today's 2 topics:

- The Trappist-1 planetary system located about 40 light years away in the constellation of Aquarius consists of a small red dwarf star and 7 Earth sized planets. By carefully studying changes in the planet's transit timings and the shape of the dip in the host star's brightness as each planet transits across it, astronomers have been able to measure the orbital period, radius, and approximate mass for each of the 7 planets.

- Recently my Catalina Sky Survey teammate Richard Kowalski discovered 2017 MB1, a 0.4 mile diameter asteroid with the Catalina Sky Survey Schmidt telescope on Mt. Bigelow, AZ. Two hours and 11 minutes later it came into a set images I obtained with the 60 inch telescope on Mt. Lemmon, AZ. After I reported it, the new object was tracked by telescopes in Arizona, New Zealand, Slovenia, Kansas, Australia, Hungary, France, and Brazil.

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