You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar

Observing >> Planetary and Solar System Observing Previous   Index   Next   Threaded

Pages: 1 JayinUT I'm not Sleepy Reged: 09/19/08 Loc: Utah Comet LINEAR c/2011 f1       #5265254 - 06/10/12 07:51 PM Edit   Reply   Quote Quick Reply   Okay, so sometime this week I'll be poking around Draco, Bootes and Ursa Major. I noticed in prepping a few finder charts that Comet LINEAR is just SE of NGC 5520 in Bootes. Starry Night is listing it as a mag. 12.2 right now and I'm just curious if anyone has taken a gander at this lately? Sounds like a nice observation/sketching opportunity. This site says it is visible in a 8 inch scope in the early evening and another report I read said in late May and early June it appeared at an estimated mag 13 so the current mag of 12.2 is probably about right. Post Extras:       blb Post Laureate Reged: 11/25/05 Loc: Piedmont NC Re: Comet LINEAR c/2011 f1 [Re: JayinUT]       #5265369 - 06/10/12 09:38 PM Edit   Reply   Quote Quick Reply   Jay, Skyhound say's that it started the month at mag. 10.8 and will be brightening. They also have a very nice chart for locating the comet. Check out the site and see if you do not like it, I do. http//www.skyhound.com/sh/skyhound.html Post Extras:       JayinUT I'm not Sleepy Reged: 09/19/08 Loc: Utah Re: Comet LINEAR c/2011 f1 [Re: blb]       #5265443 - 06/10/12 10:36 PM Edit   Reply   Quote Quick Reply   Buddy, Yes I like Skyhound . . . look at the link in my first post. I didn't read enough of the information though. Their finder chart is excellent as always. Part of the reason for the post was to gather info, thanks for reminding me of their charts for comets. The other was to bring it to the attention of those that may not be aware that they can see it down to a 8 inch scopes. Edited by JayinUT (06/10/12 10:46 PM) Post Extras:       John_G sage Reged: 01/18/10 Re: Comet LINEAR c/2011 f1 [Re: JayinUT]       #5265812 - 06/11/12 07:42 AM Edit   Reply   Quote Quick Reply   I made an attempt on the weekend but I had a problem with dew so no luck. It had rained earlier in the day so there was a lot of fog and mist in low lying areas. I plan on trying next weekend if the weather permits. Stellarium puts it at 12.15. Post Extras:       canopus56 professor emeritus Reged: 05/01/05 Re: Comet LINEAR c/2011 f1 [Re: John_G]       #5268999 - 06/13/12 03:25 AM Edit   Reply   Quote Quick Reply   I don't think I've ever seen a comet that plots with a double retrograde loop. I wonder what in Linear's orbital path results in that effect? See finder charts at Yoshida's site. I can't visualize how the double retrograde loop happens. - Kurt Yoshida's orbit plot http://www.aerith.net/comet/catalog/2011F1/2011F1.html NASA JPL 3D orbit applet http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C%2F2011+F1&orb=1 - Kurt Post Extras:       brianb11213 Postmaster Reged: 02/25/09 Loc: 55.215N 6.554W Re: Comet LINEAR c/2011 f1 [Re: canopus56]       #5269036 - 06/13/12 04:46 AM Edit   Reply   Quote Quick Reply   Quote: I don't think I've ever seen a comet that plots with a double retrograde loop. They all do, over two oppositions, which is what's being plotted here. (Assuming we're talking about solar system objects with a perihelion outside the aphelion of the earth's orbit). Plot Mars over three years (two oppositions and a bit): double retrograde loop. Plot Pluto over 18 months: double retrograde loop. The difficulty here is explaining how it might not happen that way. Post Extras:       Carol L Reged: 07/05/04 Loc: Tomahawk, WI 45N//89W Re: Comet LINEAR c/2011 f1 [Re: JayinUT]       #5270239 - 06/13/12 08:46 PM Edit   Reply   Quote Quick Reply   Jay, i saw it last night (June 12) at about 11pm using the 16" Lightbridge (114x) - sure felt good to log in another comet, but THB it's nothing to write home about. The coma outline looked quite large on the Sky Tools eyepiece chart, but all i could pull in was the nucleus. Sky Tools puts the coma at 5.2' but what i saw (wild guess here) wasn't quite 1.30'. We were still in astronomical twilight when i viewed it though, and i should have waited 1/2 hour for full darkness to set in. Will try again if possible. Post Extras:       gnowellsct Postmaster Reged: 06/24/09 Re: Comet LINEAR c/2011 f1 [Re: Carol L]       #5275570 - 06/17/12 12:31 PM Edit   Reply   Quote Quick Reply   We saw the comet last night (17 June ~05:00UT) in upstate NY under conditions of highly variable transparency. We used a C11 at around 200x and an FS128 at 250x, the comet was visible in both scopes (when the transparency was good). Thanks to Pete Fernandez for tracking it down. I've seen probably a dozen telescopic comets and for being an interesting view this one gets a "below average" mark. Maybe it will improve. Greg N Post Extras:       Alan French Night Owl Reged: 01/28/05 Loc: Upstate NY Re: Comet LINEAR c/2011 f1 [Re: gnowellsct]       #5275760 - 06/17/12 02:53 PM Edit   Reply   Quote Quick Reply   Greg N, Yes, it was fun to see, and I'm glad Pete called it to our attention. Definitely not, however, one of the visual highlights of the night. And yet another clear night apparently on the way... Clear skies, Alan Post Extras:       canukLX90 sage Reged: 12/25/08 Loc: B.C. Canada Re: Comet LINEAR c/2011 f1 [Re: Alan French]       #5276030 - 06/17/12 06:36 PM Attachment (21 downloads) Edit   Reply   Quote Quick Reply   On June 14th, the one clear night so far this month, I took seven 3 minute subs of the comet, and as one can see the comet is basically the nucleus with a small coma. Cheers... PJ Post Extras:       Pages: 1

Previous   Index   Next   Threaded

Extra information 1 registered and 1 anonymous users are browsing this forum. Moderator:  RLTYS  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 1238 Jump to *Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Celestial Events*General Astronomy* -----   Beginners Forum   General Observing and Astronomy   Outreach   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Speciality Forums* -----   Arizona Science and Astronomy Expo   NEAF (Northeast Astronomy Forum) and NEAIC (Northeast Astro Imaging Conference)   AstroArt   Astronomy Clubs and Star Parties   Astronomy Software & Computers   AstroWebsites   Science! Astronomy & Space Exploration, and Others   Space Rocks   Stellar Media*Swap and Shop* -----   Shop and Swap Audio Components*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements*International Year of Astronomy 2009 - Forums are now closed.* -----   IYA Archive Info

CN Forums Home