Posts by cosmos4u@scicomm.xyz
(DIR) Post #AS3DkZjPYYD6bOmt7I by cosmos4u@scicomm.xyz
2023-01-21T05:27:52Z
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While I was not really motivated to try to photograph this small, faint object with the camera equipment at hand, someone else got these nice pictures of comet #ZTF this morning from the same German state I am in: https://telescopius.com/pictures/view/138467/comet/by-oliver-schneider- and https://telescopius.com/pictures/view/138466/comet/by-oliver-schneider- - notice the super-wide fan of the dust tail (forming an antitail aready) close to our crossing of its orbital plane on 23 Januaey and the currently weak plasma tail.
(DIR) Post #AS3DkaJZO78MPXhlTc by cosmos4u@scicomm.xyz
2023-01-21T14:16:14Z
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Turns out the method I star-hopped to #ZTF this morning was almost exactly as described in https://twitter.com/Avertedvision/status/1616490746143559681 (only that I had to switch to binoculars earlier because of my poor sky) - this will work for the next few days, too! Give it a try, the Moon's coming back in less than a week and will hurt the view.
(DIR) Post #AS3DkalZhzXFoOo880 by cosmos4u@scicomm.xyz
2023-01-21T17:02:16Z
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Comeback for the 'lost' tail of #comet #ZTF? The timelapse https://twitter.com/Dave_StarGeezer/status/1616746258340667392 = https://www.facebook.com/groups/564399700347004/posts/5933829333403987/ shows interesting changes over a few hours - and in the sneak preview https://www.facebook.com/photo/?fbid=10226438797423704 from Arizona the #plasmatail looks pretty strong again.
(DIR) Post #AS3DkbPHKNIJnXNq0u by cosmos4u@scicomm.xyz
2023-01-23T01:24:55Z
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Comet C/2022 E3 (#ZTF) is passing an edge-on galaxy right now - and edge-on will also be our view of the #comet's orbital plane today which turns the dust tail into a narrow streak on both sides of the coma, with the Sun-pointing part called #antitail: the first picture from tonight I've seen is https://twitter.com/Dave_StarGeezer/status/1617313743297286147
(DIR) Post #AS3Dkbu7ThxrLBoT5M by cosmos4u@scicomm.xyz
2023-01-23T05:09:34Z
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Now we're talking: in the image https://spaceweathergallery2.com/indiv_upload.php?upload_id=191850 of #comet #ZTF from Italy this morning the #antitail is almost dominating (!) the view, at least length-wise. All a consequence of Earth diving through the comet's orbital plane.
(DIR) Post #AS3DkcQNXllixEuEMq by cosmos4u@scicomm.xyz
2023-01-26T18:45:48Z
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The #comet C/2022 E3 (#ZTF) with a prominent #antitail on January 24 and 25 by Austria's two most accomplished comet photographers Gerald Rhemann and Michael Jäger, respectively, from https://www.facebook.com/groups/227002358661288/posts/948063173221866/ and https://www.facebook.com/photo/?fbid=1564463910737102
(DIR) Post #ASOHgJO3rKbFty2RIe by cosmos4u@scicomm.xyz
2023-01-28T01:10:53Z
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If your sky is clear tonight, you can use the photograph https://twitter.com/AdrianJannetta/status/1619123321718841345 to find #comet C/2022 E3 (#ZTF) in no time as both the Little and the Big Dipper are included. The comet - easy in binoculars, in dark skies, especially after moonset, also faintly naked-eye - is close to the second-brightest star of the former, Kochab.
(DIR) Post #ASOHgKOo62n52ZOY6K by cosmos4u@scicomm.xyz
2023-01-28T22:04:01Z
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Finally saw #ZTF again tonight, at 21:50 UTC from Bochum, Germany, in city- *and* first-quarter-Moon-lit skies with a NELM of 3.2 or something. The #comet in 11x70 binoculars was easy to spot nonetheless, big (diameter-wise) and pale, but it almost required averted vision to see it well. Still 3+ hrs to moonset which may improve the view if weather holds ... Handy finder charts for right now: https://twitter.com/mars_stu/status/1619308402420895746 and https://twitter.com/sjb_astro/status/1619362134235959296
(DIR) Post #ASOHgKq6SYcoPEALeC by cosmos4u@scicomm.xyz
2023-01-29T00:25:31Z
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Some untracked #ZTF pictures from Bochum tonight (Moon low but not set yet) with a Lumix DMC-FZ300, all at f/2.8: two with maximum zoom and cropped, 5 sec @ ISO 3200 and 10 sec @ ISO 1600 and a wide view including UMa with the comet marked,13 sec @ ISO 800.
(DIR) Post #ASOHgLIojnarqHbHP6 by cosmos4u@scicomm.xyz
2023-01-30T19:59:31Z
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The Moon just can't make comet #ZTF disappear: just caught it again through cloud holes, from Bochum, Germany. Lumix DMC-FZ300, zoom at/near max. at f/2.8, 8 and 6 seconds at ISO 1600. The map shows the IMHO easiest way to starhop to the comet from Polaris tonight.
(DIR) Post #ASOHgLo0roXzP2CC1o by cosmos4u@scicomm.xyz
2023-01-31T21:43:34Z
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Hello, old friend ... surprisingly again clear skies, this time w/o any clouds, over Bochum, Germany, this evening: comet #ZTF in 11x70 binoculars appears big but with even lower contrast than before, probably due to the increasing moonlight. For the camera it's as easy a target as before: here are crops from the two best shots at maximum zoom, both 6 seconds at f/2.8 and ISO 1600.
(DIR) Post #ASOHgMPwamt9IfwU9Q by cosmos4u@scicomm.xyz
2023-02-06T03:11:12Z
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Picked out #comet C/2022 E3 (#ZTF) out of the fullmoon-lit sky right next to #Capella - and surprise: at maximum zoom of the DMC-FZ300 a stellar-like central condensation appears (while the coma is subdued by the bright Moon). Checked with stellarium-web.org: this is NOT a background star! The star right next to the comet has 10.0 mag., by the way. Second (max. zoom) picture is 3.2 seconds at f/2.8 and ISO 1600 (with contrast cranked up) - stars trailing now as declination has gone down to 41°N.
(DIR) Post #AU6CsBfl2XXq1VYI64 by cosmos4u@scicomm.xyz
2023-03-29T01:21:11Z
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"We, at the Marshall Space Flight Center, spent years converting the original 16mm, 35mm and 70mm films to digital. As a side project, I decided to make the ultimate #SaturnV launch and I spent weeks picking the best shots. I know it launches slower than in real life but I wanted you all to be able to lovingly relish each amazing angle": https://www.youtube.com/watch?v=ViNcBQ8cDA0 - I herewith vote for an Artemis II launch in daytime and sunshine. And with lots of slow-motion cameras around ... ;-)
(DIR) Post #AUZ2YUpf8ZQC14MKcC by cosmos4u@scicomm.xyz
2023-04-12T04:08:05Z
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Astronomers last year observed two chance alignments of Earth, Saturn's #Titan, and a distant bright star to learn about the moon’s atmosphere and build improved models of its winds: https://www.noirlab.edu/public/blog/forecast-for-titan/
(DIR) Post #AUZ2zBqxoCpmyMhEum by cosmos4u@scicomm.xyz
2023-04-12T04:14:05Z
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@shannonsays Similar results from the VLT during the November 30 event: https://skyweek.wordpress.com/2022/12/03/allgemeines-live-blog-ab-dem-3-12-2022/#Dec04 - at one point you also see two images of the star on both sides of Titan.
(DIR) Post #AVb0jROK7eNAFqsG4O by cosmos4u@scicomm.xyz
2023-02-08T23:52:20Z
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Lots of news from small #lunar missions ... 1) #LunarFlashlight faces significant challenges in its goal of getting to the #Moon, with the target orbit changed: https://blogs.nasa.gov/smallsatellites/2023/02/08/nasa-eyes-new-lunar-cubesat-orbit-propulsion-challenges-continue/. 2) #CAPSTONE is in good health following a communications issue that began in late January: https://advancedspace.com/capstone-mission-resiliency-at-moon/ and https://blogs.nasa.gov/artemis/2023/02/08/capstone-to-test-technologies-after-recovery-from-communications-issue/. And 3) #IntuitiveMachines is moving the landing site for its first lunar lander mission "IM-1" to the south polar region of the Moon: https://spacenews.com/intuitive-machines-moves-landing-site-of-first-mission-to-lunar-south-pole/
(DIR) Post #AVb0jSRuBopdXFYdI8 by cosmos4u@scicomm.xyz
2023-05-12T23:57:17Z
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The miniaturized propulsion system, the first of its kind ever flown, of NASA's #LunarFlashlight has proved unable to generate enough thrust to get into lunar orbit, despite months of effort by the operations team: https://www.jpl.nasa.gov/news/nasa-calls-end-to-lunar-flashlight-after-some-tech-successes - because the CubeSat cannot complete maneuvers to stay in the Earth-Moon system, NASA has called an end to the mission
(DIR) Post #AVluR54Y2qSk9hAAbY by cosmos4u@scicomm.xyz
2023-05-17T20:26:24Z
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@FFMbyBicycle @adfc_ffm @SheDrivesMobility Aus der Entwicklung von 15- bis 20000 Toten pro Jahr vor 50+ Jahren zu (immer noch viel zu vielen!) 2500 pro Jahr heute bei wesentlich mehr Straßenverkehr - https://de.wikipedia.org/wiki/Verkehrstod#Deutschland - auf "keine wirksamen Maßnahmen" der Politik in den letzten Jahrzehnten zu schließen, ist ... bemerkenswert..
(DIR) Post #AWFAV0ByctHIqLbeVs by cosmos4u@scicomm.xyz
2023-05-31T21:24:25Z
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@sternwarte @MarioArnone @hausderastronomie @monika_staesche Danke für den Tipp ... hätte mir einen besseren Platz als einen Balkon mit Baugerüst davor suchen sollen: https://scicomm.xyz/@cosmos4u/110465383159144440
(DIR) Post #AWbGMFdy9v0TzbYmtE by cosmos4u@scicomm.xyz
2023-06-11T23:59:07Z
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@Ally_SMMiller Got some, too ... and #Bloomscrolling is a great hashtag!