M67 Mag Chart , ToBuy
Cabrillo College Observatory ClearSkyClock
5-day forecast
As of Mar 30, 2025. Check out past events here.
NEA Occultations alerts at RASC , How to Report a CBET , and 50 most recent CBETs , RECONN Trojan Events Upcoming
Asteroid Occ Predictions: Steve Preston's , Derek Breit's , Calif Path Maps , SF Extra Event , IOTA Observations , Report Template , Reporting ACROSS events
LuckyStar Portal , Journal of Occultation Astronomy Issues , GAIA Astrometric Astroid Binaries List , UCAC4 details
Software: Using AVIsynth , TANGRA , Making Aladin Finder Charts , Visual Limiting Mag , Registax and Occ Video ,
PyOTE 8min tutorial , PyOTE HowTo , PyMovie Tutorials , FFmpeg edit/convert video , PyMovie: Vimeo HowTo , My PyMovie/PyOTE Instruc
Making C2A Charts , YouTube IOTA Videos , Journal of Double Star Observations
Brad Timerson's LiMovie vid , My "Using LiMovie" , Reported Asteroid Occulations , OW Cloud predictions
ACROSS Predictions with maps , RECON Predictions through 2029
Equipment: Watec 910HX , specs , my Tests , Docs , Response curve , Video astrometry , PC165DNR , Video recording Occultations ,
My "Using 8SE/Video/VTI 2nd Unit" (pdf) , HristoPavlov.net , f/3.3 vs 0.5x Orientation 8SE
MISC: Star cross ref , South Bay Grazes , SF Grazes , Lunar Phases , Driving Distance Calculator , Remote Control of PC165DNR ,
Atmospheric Extinction vs. Altitude=.4/sin(a) mags , magnitude vs. luminosity calculator
Free
WiFi hotspots in California , Comet /DSO Photo Op's
M67 Mag Chart , ToBuy
Cabrillo College Observatory ClearSkyClock 5-day forecast
Apr 1 Tue - daylight occultation of Plieades around noon. on 16+ moon.
Apr 1 Tue eve 8pm - Occultation of a 13.5 Star by 2001 SE277. I've set an icon at BlueBall Park. Bernard's well placed at home. Planning page if clear
Apr 1 Tue eve 10:01pm - Occultation of a 13.2 Star by Feodosia, from wide path including all team members. Dur=6.3s. Alt=70, Az=284, will be tricky to ID early when altitude is higher than 70. Planning page if clear
Apr 2 Wed morn 3am - Occultation of a 10.7 Star through Santa Cruz. Dur=2.5s, but altitude only 13 degrees in SE. Bad time of night; I may skip it if it doesn't clear my local horizon.
Apr 3 Thur eve 8:32pm- Occultation of an 11.5 Star by 2001 XY26, from Natural Bridges and La Selva. Dur=0.3s, rank not great. Worth a try because it's close and bright, but odds not high. However, a more high rank event we could combine with Karl is next up...
Apr 3 Thur eve 10:52pm - Occultation of a 12.0 Star by asteroid 1032 T2, Karl on centerline. Radonich Ranch good too, and nearby. Movie night if clear?
Apr 4 Fri 9-5pm - Conference at Stanford University on Existential Risk, you're reg'd already, as is Sandy Faber. See email
Apr 5 Sat - Mt Diablo 50k Race and Half Marathon and the 50k course
Apr 5 Sat - give talk at SJAA Hough Park, on Asteroid astronomy . Community Outreach Page , and SJAA announcement page
Apr 7 Mon eve 7-8pm Uranus occults a 9th mag star. Hurt by twilight. Epsilon ring and maybe others if we can get a bigger scope. Only 1.5" from Uranus 80x brighter. Tough. But worth a try from the 12" w/ no focal reducer at Cabrillo Observatory. MIRA and FPO not available. Planning page.
Apr 9 Wed eve - Occcultation of a 13.3 star by TNO Asteroid 2012 YF12. Planning page
Apr 10 Thur 6-9pm - Astro 27 pre-trip meeting
Apr 14 Mon - P-show
Apr 15 late eve - Occn of 2.9 mag Pi Scorpii on 90- moon
Apr 18-20 Fri-Sun: Astro 27 at Laguna Mtn. Final meeting May 2 optional for students.
Apr 22 Tue 6am at Doc
May 6 - Sun crosses Saturn ring plane and rings become very dim and irregular and quite thin. In morning sky
May 14 - The Occultation of a 14.2 Star by Amphimachus
May 17 - TrailQuake Half marathon
May 24 Sat - Give talk on Asteroid Astronomy for MIRA in Monterey. Dinner 5:30pm
May 31 - Wildcat Half Marathon
Jun 29 6pm Mars misses 24+ moon in late afternoon by just a few arcmin. Graze steep, in Baja. Photo op only.
July 7 - 3:30am - Occultation of a 12.4 Star by RECON asteroid Achates from LA to Las Vegas. Pretty hot in the desert, path not certain enough to make it worth the drive at the moment.It's also in the new FY 25/26 and may not be possible to reserve a van.
Aug 9 - Bear Creek Half Marathon
Aug 16 - June Lake Triathlon
Aug 23 - Double DipSea Race
Sept 7? - GraniteMan Challenge
Oct 4 - Auburn Half Marathon
Oct 18 - Mt Diablo Summit Stomp
November Late- mid December: Saturn's rings are less than 0.5 degree inclined, but still bright because now sunlit again.
Sep 5 - internet hosting plan expires and you must renew with the options you now desire before this date, else auto-charged.