Cabrillo College Observatory ClearSkyClock
5-day forecastAs of Aug 1, 2026. Check out past events here.
Publishing: Overleaf to Write Papers , How to Report a CBET , and 50 most recent CBETs ,
Asteroid Occ Predictions: Steve Preston's , Derek Breit's , Calif Path Maps , GAIAMoons Predictions , IOTA Observations , Report Template ,
Reporting Observations: IOTA Hub , Reporting ACROSS events
ACROSS Predictions with maps , RECON Predictions through 2029 , RECONN Trojan Events Upcoming ,
LineA Occultation Prediction Database (very comprehensive) , Naming Minor Planet Discoveries , NEA Occultations alerts at RASC
LuckyStar Portal , Journal of Occultation Astronomy Issues , GAIA Astrometric Asteroid Binaries List , RASC high value '25 Occs
Software: Using AVIsynth , TANGRA , Making Aladin Finder Charts , Visual Limiting Mag , Registax and Occ Video , UCAC4 details
Install PyOTE/Pymovie/PyOTE , 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 , OWc predictions
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 , Occ8SE-Instructions
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
M67 Mag Chart , Taking Dark, Flat video
Cabrillo College Observatory ClearSkyClock 5-day forecast
'25/26 Flex Activities:
Wed Aug 20 12-1pm - CCFT Luncheon at Hort 5005 (late approved but I had not reg'd 1hr)
Wed Aug 20 3-5pm - CTC Connection, at the CTC center 1400 (reg'd, done)
Thur Aug 21 3-5pm - use this for Program Planning work at the Dept level. NOT Fri 3-5pm because that interferes with Astro Dept meeting.
Fri Aug 22 - Fri 2-4pm?? Astro Dept meeting (not created). Maybe instead slot this for 9-11pm so can use for AM3 and Will Glass meetup at observatory?
talk at Chabot
Watsonville show/tell in September
Nov 6, Thur 6:15pm - Natalie Batalha at the Music Center UCSC, talk on exo-planets. I'm reg'd
Dec 3, Wed 5-7pm - Community Star Party at Cabrillo Observatory. Highlights; Saturn rings edge on, Jupiter, Orion Nebula, star clusters.
Jan 12 Mon - 1:15pm at ISB 221 UCSC - climate scientist Ben Santer talks.
Jan 21 Wed eve - dinner with Zeke Hausfather with EFI/UCSC-CAN. 6pm at Avante
Jan 22 Thur - FGSS Grant ceremony (2hr)
Jan 23 Fri - STEM meeting (2.5hr) , Astro Dept meeting at Observatory (4hr)
Feb 26 Thur 3:30pm @ CfAO Atrium - Climate Salon #5 w/ Patrick Chuang - "Energy and Material Constraints on a Fossil Fuel Free World". See Sandy's email 2/17.
Apr 16 - Thur 11:30am - Zoom session for response if ICE invades campus. Flex credit 1.25 hrs. Zoom link
Apr 30 Thur afternoon "Planetary Health" panel at Seymour Center 4-6pm. I'm reg'd
May 7 5:30pm- Scholarship potluck/celebration at Hort. Jordan featured too.
May 11 Mon eve 8-10pm - Community Star Party at Cabrillo Observatory
May 13? Rosemary Greiner Peace Awards
May 15 - Celebration for Cabrillo SA's, at Coconut Grove
June 30 Tue 3-4pm at CfAO; meet with X. Prochaska on Scenario constructions
Flex Activities for FY 26/27
--Jul 2 Thur - pilot EFI/UCSC-CAN Retreat strategizing. All day ( 8hrs 9-5pm) PowerPoint of 42 slides created, given to group, and brainstorming on much more on how to change Universities to meet the challenge of a very different world up ahead.
--July 12 Sun 1-2pm - Meet with X on designing a climate blog, AI
--July 27 Mon - 1.5hr x 2 for my presentation on Hansen's latest article "Beware Media Hype! It's not the El Nino!"
Aug 3 Mon morn - Occultation by Trojan asteroid Aneas of a W=14.5 Star, from Russian River area. Good rank, meaning the southern uncertainty red line is still far north of us, in Marin. Not much chance given for Santa Cruz, and it's 5am, so I'm going to skip it. Dur about 4.5s.
Aug 5 Wed morn 1:30am - Occultation of a W=12.9 Star by Asteroid Holmia. from Santa Cruz and Karl's in path too, and Bernard. Planning page
Aug 5 Wed - SpaceX rocket hits the moon, for Americas best viewing.
Aug 7 Fri - deadline to submit photos for "All College Day". Submit photos through the Google Form by Friday, August 7 at 5 p.m. Please send any and all department photos, College and student event photos, club photos, sports photos, arts photos, and more.
Aug 10 Mon eve - Occultation of a W=12.6 Star by (1794) Finsen, from Santa Cruz county. We're all in the path. Dur=4.3s Alt=50, Az=166 in Aquila. Planning page
Aug 10-15 Mon-Sat dates for Barcroft EBAS. $125/night. See here. I've not reserved yet, CLK prob not.
Aug 11 - Occultation at Mendicino of Asteroid 2000 NN3, recorded as a new binary asteroid by Ted Swift early this year, and it's making a comeback. Alas, it comes ashore all the way up the coast at Pt Arena, likely ruined by fog and dense redwoods along all roads. I'm taking it off my likely events.
Aug 11 Tue 1:51am - RECONN Occultation of Trojan Asteroid (4828) Misenus, on vertical path, Ano Nuevo good. Davenport on Southern limit, Santa Cruz in 1-sigma zone. This looks to be a high-value event and we should plan for. Fades from G=15.4 to G=16.1 for about 2s depending on albedo. Need good skies. Moonless is guaranteed. Planning page
Aug 12 10pm Wed eve - Occultation of a 6.6 Star for 0.6s, by Verne, from Parker Creek campsite, and also from Grandview Campground. Alt=23. Planning page
Aug 12 11pm Wed eve - Occultation of a 13.5 Star for 0.8s at New Melones trailhead. Maybe on way from Mendicino to Barcroft?? Hot, Better the Verne occ above.
Aug 13 - Thur morn 1:16am - Occultation of a 12.4 Star by Wodehouse, alt=20 from Patriarch Grove (where we usually camp) RUWE=0.95 for 1.5s. Alt=23. Good event. Planning page
Aug 14 Fri morn 12:00:01am - Occultation of a 12.6 v red star by Tombickler, from Fales Hot Spring Hwy 395.
Aug 14 Fri morn 1:46am - Occultation of a 13.7 Star for 5.2s by Rausudake from Little Lake.
Aug 14 Fri morn 3:58:14am - RECONN Occultation of a G=15.3 Star by Trojan Asteroid () Bitias, from Barcroft Lab, White Mtns. And Paso Robles area. Alt=43. Planning page
Aug 14 Fri eve 10pm - Occultation of a 10.2 Star by 2001 TB153, from Little Lake. Also Moss Landing. Planning page
Aug 15 Sat eve - 8:55pm - Occultation of a 13.5 Star by Imada. From Bartlett next to Owens Lake. for 4.7s. Alt=27 Sun=-14. Planning page. Ted Swift is on for this near Davis.
Aug 15 - Occultation of a W=12.6 Star by suspected binary asteroid 1985 TW3, from Big Pine, CA on way to/from Barcroft Lab? Planning page.
Aug 15 - Saturday - June Lake Triathlon
Aug 16 Sunday - Santa Cruz Roughwater Swim
Aug 17 8:30-noon - All College Day at Cabrillo.
Aug 23 - Sun - Sandman Triathlon
Aug 25 - Tue morn 4:17:09am - RECONN Occultation of a G=12.5 star by Trojan asteroid (2207) Antenor for 3.9s, from Russian River. Alt=30. High rank.
Aug 27 - almost total lunar eclipse in early evening.
Sep 5 - internet hosting plan expires and you must renew with the options you now desire before this date, else auto-charged.
Sept 11,12,13 - GraniteMan Challenge. Ask High Sierra Tri Club if GraniteMan is official this year.
Oct 12 - 8:06UT, RECONN Occultation of Trojan Asteroid (4754) Pantoos, of 11.1 star for 10s. From Central CA somewhere. Map not given on RECONN site. Look it up on OWc when in range.
Oct 18 - 10hr UT - RECONN Occultation of 16.2 Star by () Asteropaios from CA
Oct 25 - 11hr UT - RECON Occultation of 14.9 Star by Mentor for 10s. G=16.4, Mentor=14.2 - very difficult even for MIRA
Nov 9 - 13UT - RECON Occultation of 14.2 Star by (5648) by 15.0 () Axius, for 5.3s, from Central CA
Dec 1 - Dr. Palachek 6:30am