[amsat-bb] Fwd: [Launch Alert] Thursday Launch

Rick Tejera saguaroastro at cox.net
Tue Oct 6 23:30:09 UTC 2015

Just got this from the VDB alert service I subscribe to
Rick Tejera K7TEJSaguaroAstro at cox.net623-203-4121

-------- Original message --------
From: Launch Alert <launch-alert at mailman.qth.net> 
Date: 10/06/2015  12:32  (GMT-07:00) 
To: launch-alert at mailman.qth.net 
Subject: [Launch Alert] Thursday Launch 

The launch time for Thursday morning's Atlas V launch from Vandenberg AFB is 05:49 PDT. Following liftoff, the Atlas will rise vertically for several seconds and then probably begin a gradual turn towards the south.

The announced launch time is several minutes before the start of morning twilight at Vandenberg. If the rocket makes a gradual climb into orbit, the powered phase of the launch will probably end before the Atlas climbs into sunlight. In this case, the Atlas will resemble a moving orange or white light.

However, if the rocket makes a steep climb into orbit, the Atlas initially will resemble a moving orange or white light. The rocket may then climb high enough during the powered phase of the launch for the exhaust plume to catch the Sun's rays, creating a weak Twilight Effect.

Regardless of the angle of the rocket's climb, the event could be visible to the naked eye for a few hundred miles.

The probability of acceptable weather at launch time is 70%.

Webcasts of the launch should be available from the following web sites:




Because of my schedule, I will not be able to answer questions regarding this launch. For information about viewing Vandenberg AFB launches, go to:


For information about photographing Vandenberg launches, go to:


Please note that I do not add people to the Launch Alert mailing list. Launch Alert is a self-service newsletter. In other words, people interested in subscribing need to do so themselves. Also, I do not change reader e-mail addresses or unsubscribe readers.

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