M67 Mag Chart , ToBuy
Cabrillo College Observatory ClearSkyClock
5-day forecast
As of May 17, 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 , Dunham's List of 2025 Best Events
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 , OWc 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
May 22 - Thur 2:30pm-2:50pm Zoom with Dave R. See email of May 20 for link.
May 23 - Fri morn 12:24am - Occultation of a W=5.5 Star by Asteroid Johnpenna - from Jolon Rd near Lake San Antonio. Planning page
May 23 - Fri eve - dinner w/ Kent and Barb
May 24 Sat - 5:30pm Dinner, then give talk on Asteroid Astronomy for MIRA at Monterey Peninsula College.
May 25 Sun - 4:30pm SunriseSC bonfire on Seabright Beach.
May 31 Sat 10:15am - "Resist" at Main Beach SC. Mary C will be an organiizer...
Jun 3 - 4-5pm Tue - UCSC-CAN meeting on Zoom. See May 13 email from Alexei.
Jun 10 10:46pm - Wide path occultation of Euphrosyne. Includes MIRA near centerline, we're well inside, so is Ted Swift. Planning page. Dur=30s. Full moon night.
Jun 12 1:48am - Quaoar occultation across Central California. Including MIRA, and the northern limit nominally crosses over Karl. 47s duration, mag=15.5. But 99% moon only 14 degrees away (!). Alt=38, Az=south. Long integration to get this faint star will be perhaps impossible with such a bright moon so close. Remove f/3.3 reducer and maybe it'll work?? Planning page
Jun 16 Mon eve - Occultation of a 9.8 Star by Emita. Entire SC and SC Mtns inside the shadow. Dur=6.2s, Alt=31, Az=237 in Virgo. Planning page
June 16 Mon eve - Occultation of 8.7 Star by (1001) Gaussia - entire Monterey Bay and Santa Cruz. Planning page
Jun 17 Tue eve 10:55pm - Occultation of a 8.4 mag star by Madeline - from Santa Cruz and SC Mtns. All of "team santa cruz" inside the path of this bright event. Planning page
Jun 20 Fri eve 11:21pm - Occultation of a 11.6 star by Shimizu, from Santa Cruz and SC Mtns. Wide path includes Karl. Planning page
Jun 24 11:30pm - Occultation by Quaoar's rings? of a G=15.2 Star. Perhaps a MIRA trip?
Jun 26 Thur 1:59am - Occultation of a 13.5 Star by Bangsgaard, from northern Santa Cruz and mtns. Planning page
Jun 29 6pm Mars misses 24+ moon in late afternoon by just a few arcmin. Graze path steep misses off the coast, would have to go to Baja. Photo op only.
July 7 - Mon morn 3:30am - Occultation of a 12.4 Star by RECON Trojan asteroid Achates. And, according to the path on the RECON page. The path is high rank and goes from Carrizo Plain and NE from there. I will try to reserve a van for this special event.
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 9 - Thur 6-9pm - Astro 25 pre-trip meeting
Oct 17-19 - Fall Astro 25 course. Destination TBA.
Oct 18 - Mt Diablo Summit Stomp (can't do it this year)
Oct 23 12:49am - Occultation of a 13.7 Star for 13 s by Jupiter outer moon Himalia. MIRA 36" inside the northern limit. Could get interesting topography record?
Oct 25 - Sat eve 10:53pm - Occultation of a 9.9 star by NEA Object (98943) 2001 CC21. High value! Bright star! Weekend! This should be a prime target for a Fall trip by Team Santa Cruz. Planning page. Duration 0.12s is long enough for 1x recording to get a good S/N detection and
Nov 19 3:09am - Occultation of a 15.0 Star by TNO Bienor, from the tip of Pt Conception only. 21s duration. High risk, tough.
November Late- mid December: Saturn's rings are less than 0.5 degree inclined, but still bright because now sunlit again.
Dec 5 10:01pm - Occultation by Trojan Asteroid (1173) Anchesis, of 14.6 mag star for 19s. Through Southern Anza Borrego desert and N limit at Needles. Apply for van (maybe they'll still give us one?). Cold nights but perhaps OK sunny days?
Dec 13 at 12:22am - Occultation of a Jupiter satellite Elara from Marin and Fairfield/Davis area.
Sep 5 - internet hosting plan expires and you must renew with the options you now desire before this date, else auto-charged.