Post AS3DkcrJvbJsInVkMS by adamasnemesis@social.adamasnemesis.com
(DIR) More posts by adamasnemesis@social.adamasnemesis.com
(DIR) Post #AS3DkVnWBL7QOyg6xk by cosmos4u@scicomm.xyz
2023-01-11T16:22:57Z
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In spite of the moonlight currently spoiling the view the #plasma tail of #comet C/2022 E3 (#ZTF) came out great in this image by Michael Jäger this morning - https://www.facebook.com/photo/?fbid=1554023915114435 or https://twitter.com/Komet123Jager/status/1613093284456599552 - from Austria: 24 minutes integration with an 11-inch RASA telescope.
(DIR) Post #AS3DkWD2eRXFg8cUkK by cosmos4u@scicomm.xyz
2023-01-13T00:28:06Z
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Moon-free viewing of #comet C/2022 E3 (#ZTF) will resume shortly, first only short intervals, soon the whole night: in https://skyweek.wordpress.com/2023/01/13/ein-fahrplan-fur-den-kometen-c-2022-e3-ztf I analyze the viewing circumstances day by day for the next 4 weeks, calculated for 50° North. Lots of great opportunities ... weather permitting.
(DIR) Post #AS3DkWdz2H5P1hE0jw by cosmos4u@scicomm.xyz
2023-01-19T00:20:32Z
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Let's see how this gets formatted ... #comet C/2022 E3 (#ZTF) with its long #plasmatail on the European morning of 17 January by Michael Jäger, in deep b&w and with color added, from https://spaceweathergallery2.com/indiv_upload.php?upload_id=191636 and https://spaceweathergallery2.com/indiv_upload.php?upload_id=191662 (both processed further, for use in https://skyweek.wordpress.com/2023/01/14/allgemeines-live-blog-ab-dem-14-januar-2023).
(DIR) Post #AS3DkX73ICL2TqpE36 by cosmos4u@scicomm.xyz
2023-01-19T16:10:24Z
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According to the latest observations tabulated in https://cobs.si/cobs/comet/obs/2323/ #comet #ZTF has taken the 6.0 mag. hurdle last night and reached about 5.5 mag. - and there is even a (single) naked-eye observation there! But beware, you still need reeealllly dark skies to see it well even in binoculars, let alone without optical aid, as the light spreads over a huge area (10+ arc min.). Another magnitude gain over the 3rd January decade is not out of the question. Clear skies to everyone (and me, too)!
(DIR) Post #AS3DkXdJMG8u5tuzKa by cosmos4u@scicomm.xyz
2023-01-20T23:43:07Z
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Observations tonight show hardly any plasma tail of comet C/2022 E3 (#ZTF) while the dust tail is doing fine: https://groups.io/g/comets-ml/message/31060. And the timelapse from 7:30 to 11:00 UTC Friday https://twitter.com/brennanmgilmore/status/1616554088262520834 shows something weird happening to the plasma tail right at the end.
(DIR) Post #AS3DkYDTBp49u2prgu by cosmos4u@scicomm.xyz
2023-01-20T23:59:26Z
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The Japanese image https://twitter.com/scoria_cone/status/1616543817125224448 of comet #ZTF from Friday at 20:28 UTC (as the photographer told me) shows a short #plasmatail, perhaps already re-growing after a disconnection event. More data needed to fully understand what happened.
(DIR) Post #AS3DkYlr7yZVcgvKHw by cosmos4u@scicomm.xyz
2023-01-21T03:28:23Z
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Whoa, in the image https://www.facebook.com/photo/?fbid=2094584254060947 from the night 19/20 January the #plasmatail of comet #ZTF - which was still strong then - has a length of over 10 degrees ... and is bending a iot in the #solarwind. Magnetohydrodynamical beauty ...
(DIR) Post #AS3DkZH3FzWdBRWEue by cosmos4u@scicomm.xyz
2023-01-21T05:19:19Z
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Yay, I've finally seen #comet C/2022 E3 (#ZTF) with my own eyes: with 11x70 #binoculars on a super-cold morning in a German urban area at 63° elevation with a naked-eye limiting magnitude of only 3.3 (caused by city light in combination with light fog): in the end the comet was quite obvious in this instrument, a rather extended diffuse disk without further details and a moderate surface brightness. In other words: just as expected. :-) Detailled report in German at https://www.facebook.com/groups/788806561196660/posts/5708700542540546/
(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 #AS3DkcrJvbJsInVkMS by adamasnemesis@social.adamasnemesis.com
2023-01-26T23:53:05Z
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@cosmos4u Wow.
(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.