Podcaster: Dr. Al Grauer
![travelers-in-the-night](http://cosmoquest.org/x/365daysofastronomy/files/2016/11/travelers-in-the-night-150x150.png)
Title: Travelers in the Night 659 & 660: Martian Debris (382) & Double Comet (403)
Organization: Travelers in The Night
Link : Travelers in the Night ; @Nmcanopus
Description: Today’s two stroy:
- Martian Trojan asteroids have stable orbits around the Sun, leading and trailing the red planet by 60 degrees, where the Sun’s and Mars’s gravity are balanced.
- What at first appeared to be an asteroid turned out to be a double comet.
Bio: Dr. Al Grauer is currently an observing member of the Catalina Sky Survey Team at the University of Arizona. This group has discovered nearly half of the Earth approaching objects known to exist. He received a PhD in Physics in 1971 and has been an observational Astronomer for 43 years. He retired as a University Professor after 39 years of interacting with students. He has conducted research projects using telescopes in Arizona, Chile, Australia, Hawaii, Louisiana, and Georgia with funding from NSF and NASA.
He is noted as Co-discoverer of comet P/2010 TO20 Linear-Grauer, Discoverer of comet C/2009 U5 Grauer and has asteroid 18871 Grauer named for him.
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365 Days of Astronomy
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