Rochester Astronomy Club | Josef Chlachula | Activity https://rochesterskies.org/member/josef/activity/ Activity feed for Josef Chlachula. Mon, 13 Apr 2026 02:21:35 -0500 https://buddypress.org/?v= en-US 30 hourly 2 b9d0e564275b3c5ade265517c8a8ac46 Josef Chlachula replied to the topic 2025 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2025-observing/page/2/#post-15544 Sun, 26 Oct 2025 17:17:22 -0500 In the good old times almost everyone was publishing on forum observing tonight? That topic had so many pages that it made sense to stop it and create topics 2024 observing or 2025 observing

Of course, everyone can start their own topic, and it is OK. The problem is that nobody knows about it, unless one would go on a regular basis to the forum…[Read more]

]]> 085854d53208fd9cffb4d2c17d172c95 Josef Chlachula replied to the topic July 26th 2025 was aGlorious Night for Astronomy in the forum General Discussion https://rochesterskies.org/forum/topic/july-26th-2025-was-aglorious-night-for-astronomy/#post-15475 Tue, 29 Jul 2025 01:54:48 -0500 Duane, we had great night at Frontenac, gorgeous Milky Way, mosquitos were not so bad. We were thinking about Eagle Bluff and comparing it to Frontenac.

Nice pictures.

]]> e30baac4660cf235d80d8e56f4052b07 Josef Chlachula replied to the topic 2025 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2025-observing/page/2/#post-15381 Tue, 06 May 2025 13:36:35 -0500 For several days now, there has been a large spot in the sun visible to the naked eye, through protective glasses of course.

]]> adfee8d030071348bdf24beee7b40049 Josef Chlachula replied to the topic 2025 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2025-observing/#post-15268 Wed, 15 Jan 2025 00:15:45 -0600 Today January 14 I observed comet C/2024 G3 ATLAS after sunset. I was observing over the KR7 reservoir, alternately photographing and observing with the binocular 10×50. Around 5:25pm I suddenly saw the comet in the reds low over the horizon in my 10×50. It had a bright nucleus and a distinct tail. I observed it for about 10 seconds. Then I looked…[Read more]

]]> fb368b30604f4813a89516528946b56f Josef Chlachula replied to the topic 2025 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2025-observing/#post-15258 Sat, 11 Jan 2025 19:33:05 -0600 Monday or Tuesday 1/13 and 1/14 could be sunny and comet C/2024 G3 could be visible on day sky. On Monday above Sun, so Sun could be blocked by roof,  on Tuesday comet will be on the left side of the Sun, so Sun could be blocked by the vertical wall on the right side.

]]> 0328bb643738ab0492655935ad36a51a Josef Chlachula started the topic 2025 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2025-observing/ Sat, 11 Jan 2025 17:06:49 -0600 Petr Horálek in Europe was able to take a picture of the comet C/2024 G3 ATLAS. Not only that, he saw this comet with the naked eye. Let’s hope for good weather, we should be able to see it as well.

]]> a479e5f4ef1711e99965d1d4b7991f15 Josef Chlachula replied to the topic 2025 Astronomical League Observing Challenge in the forum General Discussion https://rochesterskies.org/forum/topic/2025-astronomical-league-observing-challenge/#post-15225 Sun, 01 Dec 2024 01:26:02 -0600 Great idea. We should include some featured objects into our public events, for example M42 (Orion Nebula) or C14 (Double cluster).
Hubble imaged 87 of the 110 objects in the Charles Messier catalog and 89 of the 109 objects in the Caldwell catalog. So there is 87+89 = 176 potential objects to observe and compare with the Hubble images.

]]> ec14f2f072e87d33ec67442185040642 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/5/#post-15200 Fri, 01 Nov 2024 17:12:52 -0500 On the Sun you can see a large spot with the naked eye protected by eclipse glasses in the left part.

]]> 027ef05d50b2592d5eef3aa77252989e Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/5/#post-15190 Tue, 29 Oct 2024 03:12:55 -0500 Bob, article  https://rochesterskies.org/comet-c-2023-a3-tsuchinshan-atlas/ is now updated with your beautiful pictures of the comet A3 from October 25 and October 27.

]]> 120cd939218367a23975ac927a57fd4b Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/5/#post-15167 Sun, 27 Oct 2024 21:41:13 -0500 I think the very first opportunity to see C/2024 S1 (ATLAS) will come at 7:25 on the morning of October 29, when the comet will be at zero altitude on the Rochester horizon and the Sun will be about 3.5 degrees below the horizon. You might be able to see the tail rising, which should run diagonally to the right below Spica. Visibility will improve…[Read more]

]]> 396dbf4bc04bb095e8f7af9ee7a4575e Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/5/#post-15155 Sat, 26 Oct 2024 13:26:22 -0500 Yesterday, Friday, October 25, I was briefly observing at the KR7 reservoir in the upper parking lot, which has a better view than the lower parking lot. Unfortunately, from here you can also see the light sources on the horizon and there is clear light pollution from the city. Still, it’s a good place to observe near the city. Clouds were chasing…[Read more]

]]> e79fa1a70b87e640b37dcca1a570afad Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/4/#post-15071 Tue, 15 Oct 2024 02:29:56 -0500 I had a meeting at Assisi Heights till 8 PM tonight, actually little bit longer. After, I tried to look at West horizon, I saw  Arcturus, not Venus. I did not see comet A3 with certainty.

I hope I will go to the Root River park on Tue 10/15 to see A3 coma next to the M5, about 1 degree apart.

]]> a85817b93e942c0836ebbd513cfd7173 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/3/#post-15056 Sun, 13 Oct 2024 03:06:51 -0500 In the early evening, I went to Dakota Middle School. There’s a good view of the western horizon from there. On the way, I took a 50th Ave NW I noticed an unobstructed view of the western horizon in the gap between the houses so I observed from 50th Ave NW. I tried to capture the comet by camera. At about 7:10PM I saw the comet in the binocular…[Read more]

]]> f233eac466ba0cf6af728abcb4d3d8c0 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/3/#post-15046 Sat, 12 Oct 2024 03:55:09 -0500 The sky situation at the beginning of the public observation at Watson Soccer Fields. Two prominent celestial lights can be seen here: Venus and Arcturus. Comet A3’s height above the horizon was about 1.7 degrees lower than Venus. It is probably obscured by clouds in this image.
Tomorrow, Saturday, October 12, comet A3 will be 3.6 degrees higher…[Read more]

]]> 07d4c64619faec39b0ac5b51faf850a1 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/3/#post-15042 Fri, 11 Oct 2024 17:11:53 -0500 After 8 p.m. I parked on 65th Street, walked to the field and took pictures of the aurora from my tripod. Suddenly I noticed a bright, almost vertical band to the west. I began to wonder what it was. For a few moments I thought it might be the tail of the now set comet A3, which has suddenly become very bright and only the tail is visible.…[Read more]

]]> 30df8d67c0e4cc67f24b23f2d78df591 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/3/#post-15037 Fri, 11 Oct 2024 04:11:23 -0500 Aurora Borealis over constellation Corona Borealis above 75th ST NW

Aurora Borealis

]]> 1be0bf3640330ce94dad88501e79f0eb Josef Chlachula replied to the topic Working on A.I. Generated Night Sky Viewing Itinerary Generator project in the forum General Discussion https://rochesterskies.org/forum/topic/working-on-a-i-generated-night-sky-viewing-itinerary-generator-project/#post-15028 Tue, 08 Oct 2024 03:47:37 -0500 John, this is great project!

I tried to generate for the period from October 7, 2024, between 22:15 and 23:45. See attached PDF.

Here is what I found not accurate:

#1 Cannot not be visible: Mars is rising around 23:45
#6 Cannot not be visible: M8 is setting down around 22:15
#7 Cannot not be visible: M42 is rising around midnight
#9 Visible…[Read more]

]]> 4c5cd7441a2d815bf0fdc3c72bf30f02 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/3/#post-15027 Tue, 08 Oct 2024 03:21:22 -0500 Aurora BorealisAurora Borealis just from NW Rochester backyard tonight October 7th.

 

Aurora Borealis

]]> d0fe545d0f7080ae8fc601dc14a15316 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/2/#post-15021 Mon, 07 Oct 2024 19:19:56 -0500 I just went outside, put on my eclipse glasses and saw a big sunspot. It’s almost in the middle of the disk.

]]> fbba45560a411018c4cc6e987dde2422 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/2/#post-15017 Mon, 07 Oct 2024 02:36:14 -0500 Aurora Borealis at 8:49 tonight, October 6, from 75th Street NW. Canon EOS T6, 24mm, f/2.8,ISO3200,8s.

]]> c47d5b638f6b5e1c226dbabf059ec59e Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/2/#post-15012 Sat, 05 Oct 2024 17:09:16 -0500 I am thinking about Root River Park tonight, I hope I’ll make it.

]]> fbfebb9cfc776577853e9b332911570c Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/2/#post-14999 Tue, 01 Oct 2024 16:23:59 -0500 Light at Root River park early morning
Light at Root River park

]]> 7693713fc90a44b168a99a1c7f292cd2 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/page/2/#post-14998 Tue, 01 Oct 2024 16:21:38 -0500 Comet C/2023 A3 Tsuchinshan-ATLAS from the access road to the Root River park at 6:01 CDT. Comet was not visible in binocular, but there is a tiny spot on this and more images. Bonus is asteroid Vesta with magnitude 8.1.
C/2023 A3

]]> abfe5a38b1531171e3c7b26a31ace006 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/#post-14991 Sat, 28 Sep 2024 05:03:16 -0500 It was a glorious night for astronomy at Eagle Bluff, how Dean used to say. What a night. There was a Chinese space station -0.7 mag, then ISS -3.4 mag. Low clouds above the South horizon dissolved, and we could see Sagittarius very well. Several random meteors. Very attentive, curious and actually knowledgeable audience, 30 maybe even 40 people.…[Read more]

]]> 63fbe227ea2a5c085137d26e9a4acd1b Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/#post-14985 Fri, 27 Sep 2024 20:26:52 -0500 I have a code to enter the building and I plan to attend tonight Friday 9/27.

]]> 2b838d9feadf96467b6f1edaa650c311 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/176/#post-14968 Sat, 07 Sep 2024 02:41:30 -0500 Here is interesting reading, if applied it could help to limit light pollution.

Standards for state-funded outdoor lighting fixtures.
(a) An outdoor lighting fixture may be installed or replaced using state funds only if:

(1) the new or replacement outdoor lighting fixture is a cutoff luminaire if the rated output of the outdoor lighting fixture…[Read more]

]]> cd61bcd373d73081536de32b51e74d38 Josef Chlachula replied to the topic Orion website, telescope.com in the forum General Discussion https://rochesterskies.org/forum/topic/orion-website-telescope-com/#post-14962 Mon, 02 Sep 2024 23:33:23 -0500 Two videos about Orion / Meade / Coronado abruptly closed
https://www.youtube.com/watch?v=Wjsx2T55PHc
https://www.youtube.com/watch?v=O9VFVsz_sb8

]]> 8c0c8efb141dec3f61eef34dac454fe1 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/176/#post-14953 Fri, 30 Aug 2024 21:46:10 -0500 OK, I see we should continue in topic  2024-observing.

]]> cd6a40f53c116eab75dd4e6861594158 Josef Chlachula replied to the topic 2024 Observing in the forum General Discussion https://rochesterskies.org/forum/topic/2024-observing/#post-14952 Fri, 30 Aug 2024 21:04:00 -0500 Yes, indeed, it was a “Glorious Night for Astronomy” resulting to your great picture of the Milky Way. I planning be at Root River park today Fri 9/31, but just got call we’ll have a visitors. Maybe later at night. Light should be still off.

]]> 63f8eaffa1d7f22471111dbb8791d7b0 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/176/#post-14945 Tue, 27 Aug 2024 21:17:36 -0500 Duane, I’m planning on coming to the park Wednesday night to turn off the lights for the night. Josef

]]> ebca2ff65fcd4b131924ca20a6e34f6b Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/176/#post-14932 Mon, 19 Aug 2024 21:50:49 -0500 JUICE Live from the Moon now 8/19 from 4:30 PM https://www.youtube.com/watch?v=ZoodtR-46Ms

]]> 5faada2b6bedee6bdd3701fe5e6a0b71 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/175/#post-14927 Mon, 12 Aug 2024 19:51:12 -0500 I had just stepped outside and through my eclipsed sunglasses saw for the first time in my life with my naked eyes two sunspots on the Sun. The sunspot on the bottom right is 3780 and on the top left is 3784. Each sunspot could be six times bigger than Earth.

]]> fa1f3bc8b33c5a5fb46cac495d22117f Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/175/#post-14924 Sun, 11 Aug 2024 15:39:04 -0500 I just went outside, put on my eclipse sunglasses and looked with the naked eye and checked a big sunspot. It rotated and one dot of the big sun spot it is still visible. Here is SDO image made smaller so it looks almost like by naked eye

]]> 45ea3901fcff9ce8159fe92fe89a7b59 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/175/#post-14923 Sat, 10 Aug 2024 18:02:28 -0500 Good news from Gameheaven. At the same time, we (Jeff, Mike Q and I) were able to observe round Venus low over the western horizon from Watson from about 8:40 to 9pm. In binoculars, Dobson and with the naked eye.

About 10 visitors came later. Also two astronomy and physics students, I think from MN State University Moorhead, Emily is from…[Read more]

]]> cca68e6b6d400a731bacda531e8dc0c5 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/175/#post-14900 Thu, 08 Aug 2024 01:27:44 -0500 Beautiful images of the northwest horizon with crepuscular rays! I added one of them with the crescent Moon to the article about Root River Park.

]]> b032ddd166be6ed161136cb9a1b28f1a Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/175/#post-14884 Wed, 07 Aug 2024 17:45:18 -0500 I just went outside, put on my eclipse sunglasses and looked with the naked eye at the big sunspot. Here is SDO image https://sdo.gsfc.nasa.gov/assets/img/browse/2024/08/07/20240807_170000_512_HMIIC.jpg:

]]> f0b544c72a1f1cf6de4fb1876eecdefc Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/174/#post-14883 Tue, 06 Aug 2024 22:28:46 -0500 Weather forecast for tonight Tue 8/6 looks promising. I plan to go to the Root River park to make sure the light is switched off.

]]> b39b0db0127e7025fd6a997a75659f3d Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/174/#post-14824 Mon, 01 Jul 2024 05:51:59 -0500 Great, now we have darkness values. I included your  data plot into the article Root River Park 2024. Any suggestions for editing are welcome.

]]> 24f062313ae3a57a0d6ae01ee878b813 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/173/#post-14720 Fri, 10 May 2024 18:47:52 -0500 We could see this Friday 5/10 at Eagle Bluff also aurora. Aurora forecast around noon look promising.
Noonish 5/10 aurora forecast

]]> 403469eda3ae8e03d84f71f7071e813b Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/173/#post-14675 Fri, 08 Mar 2024 16:27:42 -0600 Early evening we should be able to see comet 12P/Pons-Brooks under M31 Andromeda.

]]> e83a48086ea4b0183f97f8cce16974ab Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/172/#post-14667 Fri, 01 Mar 2024 23:31:31 -0600 Starlink 1176 was launched on January 29, 2020 from Air Force Eastern Test Range, Cape Canaveral FL

]]> 5d4f8cb0536dff561f0d286ed8f1cfe2 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/172/#post-14665 Thu, 29 Feb 2024 21:14:32 -0600 If you know time of the image(s) set that time at https://stellarium-web.org/skysource/Bode'sGalaxy?fov=4.7939&date=2024-02-29T02:10:34Z&lat=44.08&lng=-92.51&elev=0 and you may see that satellite passing by.

]]> 2bca665dcfca91ed78d59de7d5f0c24b Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/172/#post-14660 Sun, 18 Feb 2024 01:11:11 -0600 Most likely I was able to see 8 mag comet 12P/Pons-Brooks by 10×50 binocular from light polluted backyard.
See at stellarium-web.org .

]]> 8dbc7d9d042e6146096811490ecb9de6 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/172/#post-14618 Fri, 02 Feb 2024 20:49:59 -0600 Very nice GIF image comparing images M101 with supernova about 250 days(8 months 5 days) apart!

]]> ede3a5fc3f58462fe3184f5c0ba14f6f Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/170/#post-14463 Mon, 04 Sep 2023 11:30:01 -0500 This morning at about 4:45 AM I was able to see comet C/2023 P1 Nishimura from Root River Park by binocular 10×50. Comet was left from M44. See Stellarium.

]]> 3c5155238656e4ed9c5150a4e455d647 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/170/#post-14265 Sun, 28 May 2023 17:50:48 -0500 Great picture of the supernova 2023ixf! Looking at stars around like at Stellarium-web  supernova could be brighter than 12 mag. According to https://www.rochesterastronomy.org/sn2023/sn2023ixf.html it could be around 11 mag.
See also AAVSO chart and labeled stars or brightness reports.

]]> d59a3f1ba7931dd8f74b2a08f0356858 Josef Chlachula posted a new activity comment https://rochesterskies.org/activity/p/347/#acomment-348 Sun, 21 May 2023 00:09:36 -0500 Well, there will be tonight 5/20 visible 22 Starlinks G6-30 from 22:34 for about 4 minutes at SouthWest entering Earth shadow inside constellation Leo. Magnitudes only 2.8 and I guess they will be spread 5 times more than yesterday.

ISS is passing above Cassiopeia at ~22:02 and again at ~23:39 ending in shadow in Cepheus.

I will fiddle with my…[Read more]

In reply to - fealeybob14 posted an update @josef Any dark sky, Space Station moon transit etc. plans for tonight? ]]> 2423b4d5f1fd6ac408e49382eeedcb5c Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/170/#post-14250 Mon, 24 Apr 2023 02:51:03 -0500 There is just now Kp 7.67 – storm, higher probability to see aurora, see https://www.swpc.noaa.gov/news/update-g4-storm-observed-sunday-april-23-2023

]]> 3c0ba4960aa33733a60aa25c45e10cf5 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/170/#post-14244 Thu, 13 Apr 2023 20:53:58 -0500 Great picture of the M81 and M82 with 80 mm (3.14 inch) aperture with total 16 minutes exposure. Thanks!

]]> 0738985df4dbd2e6ab37f99bcceef934 Josef Chlachula replied to the topic Observing tonight? in the forum General Discussion https://rochesterskies.org/forum/topic/observing-tonight/page/169/#post-14212 Fri, 24 Mar 2023 03:21:06 -0500 I see Northern light even from my backyard, no color though. It could be stronger about midnight see https://services.swpc.noaa.gov/images/aurora-forecast-northern-hemisphere.jpg

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