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Important Dates

General Meeting: June 10

Anza: June 4


Black Star: May 28

Upcoming Events

May 28 (Sat) at 6:00 PM : Private star party-Black Star Canyon

June 3 (Fri) at 9:00 PM : Private Outreach - Cambridge Elementary School

June 3 (Fri) at 7:30 PM : Beginner’s Class

June 4 (Sat) at 6:00 PM : Explore the Stars

June 4 (Sat) at 6:00 PM : Private Star Party – Anza

June 10 (Fri) at 7:30 PM : OCA General Meeting

More events from the calendar



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Next General Meeting (all general meetings are free and open to public)

Date: 06/10/2015

Speaker: Ben Shappee from Carnegie Observatories

Subject: The All-Sky Automated Survey for Supernovae (ASAS-SN or "Assassin")

"What's Up?": Jim Benet

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The June 2016 issue of the Sirius Astronomer is now available to members (log in required).

Back issues are available to all without a log in.


LAST UPDATE: May 25, 2016 3:04AM PDT

Saturday May 28th Black Star Canyon star party
Steve & Bonnie Short |
Mars should look great if we just can get a clear night sky!!!

Owens Valley Radio Observatory Trip
Helen Mahoney |
We are planning a trip to Owens Valley Radio Observatory on June 10-11 this summer

OCA Teenagers SIG
Helen Mahoney |
Announcement of the start of a special group for teenagers in OCA

Apr 30th BSC star part Recap
Steve & Bonnie Short |
We had 17 cars come out and the clouds cleared up for them!

Saturday April 30th Black Star Canyon star party
Steve & Bonnie Short |
Looks like we will have a nice dark sky for the April BSC star party!!!

2016 OCA Messier Marathon
Steve & Bonnie Short |
Ready to spend all night to try and see all 110 Messier objects in one night? The Anza star party in March was cloudy but there will be other clear nights for seeing all the Messier objects.

CANCELLED-March 5th BSC star party
Steve & Bonnie Short |
The March 5th BSC star party had to be cancelled due to bad weather.

Saturday March 5th Black Star Canyon star party
Steve & Bonnie Short |
If the rain & clouds will hold up, we can hold a BSC star party this Saturday evening.

Feb 13th BSC star party Recap
Steve & Bonnie Short |
Clear night and we had 24 cars come out to the Valentine Weekend BSC star party.

Saturday Feb 13th Black Star Canyon star party
Steve & Bonnie Short |
Don't let the unlucky #13 scare you away from the February 13th BSC star party. The night before Valentine's should be a warm night with clear skies!!!

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