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Members Blog

The Story of the Universe in 100 stars

December 21, 2025 Josef Chlachula Comments Off on The Story of the Universe in 100 stars
In August I received a generous gift in the form of the book “The Story of the Universe in 100 stars”. I started reading and realized that each chapter – a star – contains an interesting story, something I did not know or forgot. And since the book is divided into 100 chapters, one chapter is the story of one […]
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Sun at RochesterFest

June 26, 2025 Josef Chlachula Comments Off on Sun at RochesterFest
A public observation of the Sun at RochesterFest was planned for Tuesday 6/24 and for Saturday 6/28. Tuesday 6/24 we planned a public observation of the Sun at RochesterFest from 5 to 7 p.m. Actually, 2025 was the first year that RAC participated in RochesterFest. We were pleasantly surprised by the organizers, who provided transportation for our telescopes and other […]
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Hubble’s challenge to Josef after 35 years

January 20, 2025 Josef Chlachula Comments Off on Hubble’s challenge to Josef after 35 years
I’m old enough to remember the launch of the Hubble telescope. And right after that, the surprising image sharpness problems. NASA came out with a call this year for the 35th anniversary of the Hubble launch, basically for anyone interested in watching the sky overhead. All an observer has to do is tell others about the challenge and they’ll spot […]
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My first contributor post

November 28, 2024 Josef Ch Comments Off on My first contributor post
Hello everyone! This is just test article (or post) to test writing and publishing process.  I believe, this my profile “chlachula” has in this moment WordPress user roles Contributor and Subscriber. As a contributor, I have to submit article for review. I am going to publish in Members Blog category.
Old Frontenac Outlook
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Frontenac Summer

July 30, 2023 Josef Chlachula Comments Off on Frontenac Summer
On Saturday, July 29, a long-planned astronomical observation took place in Frontenac State Park. Fortunately, the weather was nice and clear. People can especially enjoy walking the various trails in the park. For example, the Lower Bluffside Trail Loop takes you all the way down to the Mississippi River here called Lake Pepin. Members of the Rochester Astronomy Club arrived […]
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Supernova in M101

May 29, 2023 Josef Chlachula Comments Off on Supernova in M101
Japanese astronomer Koichi Itagaki on May 18 2023 discovered supernova in the Galaxy M101 Pinwheel. Supernova was designated with name SN 2023ixf and it is about 21 million light years distant. Galaxy Messier 101  is well known to the amateur astronomers and it’s easy to find it close to the handle of Big Dipper. Now it’s passing every evening local […]
NOAA forecast
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March Northern lights

March 24, 2023 Josef Chlachula Comments Off on March Northern lights
On the evening of March 23, NOAA predicted increased auroral activity in the auroral ring over Greenland and Canada. This activity was expected to affect Minnesota at a lower intensity. The aurora was clearly visible to the naked eye even from light-polluted Rochester. One could even suspect that the streaks and clouds had some color tint. The color stands out […]
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Astronomy League Carbon stars list

February 17, 2023 Josef Chlachula Comments Off on Astronomy League Carbon stars list
Table based on AstroLeague.org observing program Carbon Stars file CarbonStarList3.pdf. # Name RA DEC Mag. Per Con Type Cat HIP Desig HD Desig 1 WZ Cas 00 01 15 +60 21 19 6.9-11.0 186 Cas C9(N1) SAO 21002 HIP 99 HD 224855 2 SU And 00 04 36 +43 33 04 8.0-8.5 Irr. And C6(Nb) GSC 2793:243 HIP 363 HD […]
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Astronomy League Double stars list

February 17, 2023 Josef Chlachula Comments Off on Astronomy League Double stars list
Table based on AstroLeague.org observing program Double Stars file DS-MasterObjectList2021.pdf # Name RA DEC Mag Sep Pos. Angle Last WDS measure 1 Eta Cassiopeiae 00h 49m.1 +57° 49′ 3.5, 7.4 13.4″ 326° 2019 2 65 Piscium 00h 49m.9 +27° 43′ 6.3, 6.3 4.4″ 115° 2020 3 Psi 1 Piscium 01h 05m.6 +21° 28′ 5.3, 5.5 29.8″ 159° 2018 4 Zeta Piscium 01h 13m.7 +07° 35′ 5.2, 6.3 22.8″ […]