(meteorobs) Eta cCetid fireball
jarnac
observe at jarnac.org
Mon Oct 14 16:02:26 EDT 2013
Dear Ron,
Thank you so much for your postin and for the compliment. It is good
to see you're reading this most interesting digest!
Doveed
At 09:00 AM 10/14/2013, you wrote:
>Send meteorobs mailing list submissions to
> meteorobs at meteorobs.org
>
>To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>or, via email, send a message with subject or body 'help' to
> meteorobs-request at meteorobs.org
>
>You can reach the person managing the list at
> meteorobs-owner at meteorobs.org
>
>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of meteorobs digest..."
>
>
>Today's Topics:
>
> 1. Re: Magnitude minus 9 bolide-- probable Eta Cetid member
> (Ronstargazer at aol.com)
> 2. Re: showers shifting through time (Trenary, Carlos)
> 3. Observation October 8/9 2013 (Pierre Martin)
> 4. Re: Observation October 8/9 2013 (Skywayinc at aol.com)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Sun, 13 Oct 2013 15:34:49 -0400 (EDT)
>From: Ronstargazer at aol.com
>Subject: Re: (meteorobs) Magnitude minus 9 bolide-- probable Eta Cetid
> member
>To: meteorobs at meteorobs.org
>Message-ID: <19d4d.3bc8a525.3f8c4fd9 at aol.com>
>Content-Type: text/plain; charset="us-ascii"
>
>
>It could not have been observed and appreciated by a better astronomer and
>friend, way to go David.
>
>
>Ron Baran
>
>President
>Royal Astronomical Society of Canada / Montreal Centre
>
>
>Warning: Looking up may cause you to see stars.
>
>
>
>
>
>In a message dated 10/13/2013 4:12:22 A.M. Eastern Daylight Time,
>observe at jarnac.org writes:
>
>Dear friends,
>
>On the morning of 2013 October 12, at approximately 10:30 UT I
>observed a brilliant fireball as follows:
>
>
>Magnitude estimate: minus 9
>Very long, moderate and graceful movement from SW to SE. After major
>flash, the remnant gradually continued southeastward for a few
>seconds before fading away.
>
>Because the Eta Cetid shower is already known for producing bright
>fireballs, including a Magnitude -20 one on 1969 9 October, I suspect
>that what I saw is a member of this stream.
>
>Sincerely
>
>David H. Levy
>
>_______________________________________________
>meteorobs mailing list
>meteorobs at meteorobs.org
>http://lists.meteorobs.org/mailman/listinfo/meteorobs
>
>
>-------------- next part --------------
>An HTML attachment was scrubbed...
>URL:
>http://lists.meteorobs.org/pipermail/meteorobs/attachments/20131013/7a3241ff/attachment-0001.html
>
>
>------------------------------
>
>Message: 2
>Date: Mon, 14 Oct 2013 02:43:31 +0000
>From: "Trenary, Carlos" <carlos.trenary at Vanderbilt.Edu>
>Subject: Re: (meteorobs) showers shifting through time
>To: "marco.langbroek at online.nl" <marco.langbroek at online.nl>, Meteor
> science and meteor observing <meteorobs at meteorobs.org>
>Message-ID:
>
><2063E8755604AD4199A12718FBBC5A75168F95AD at ITS-HCWNEM103.ds.vanderbilt.edu>
>
>Content-Type: text/plain; charset="us-ascii"
>
>Thanks to Anne, Steve and Marco for their replies.
>
>There was a discussion on a non-astronomical list stating the meteor
>showers do not shift, because they reflect the tropical year. Of
>course this did not sound correct and after a review of tropical vs.
>sidereal years I explained the error to them.
>
>
>Carlos Trenary
>Carlos.trenary at vanderbilt.edu
>Carlos.trenary at gmail.com
>Nashville Tennessee, USA
>
>
>
>
>
>-----Original Message-----
>From: meteorobs-bounces at meteorobs.org
>[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of Marco Langbroek
>Sent: Friday, October 11, 2013 8:35 AM
>To: Meteor science and meteor observing
>Subject: Re: (meteorobs) showers shifting through time
>
>Op 11-10-2013 12:30, Anne van Weerden schreef:
> > Hi Carlos,
> >
> > From a relativistic point of view, orbits which are very elongated
> > should have more shift, due to their perihelion precession, than more
> > circular ones.
> > But I guess there are also other influences such as gravity of the
> > large planets, I do not know much about the precise orbits of showers.
> >
> > Greetings, Anne
>
>
>
>
>
>------------------------------
>
>Message: 3
>Date: Mon, 14 Oct 2013 00:58:02 -0400
>From: Pierre Martin <pmartin at teksavvy.com>
>Subject: (meteorobs) Observation October 8/9 2013
>To: meteorobs at meteorobs.org
>Message-ID: <6E079015-196C-4E40-B19A-60E9BC931293 at teksavvy.com>
>Content-Type: text/plain; charset=us-ascii
>
>Hello all,
>
>The dusk-to-dawn outing we had at Nirvana last Tuesday night was
>fantastic! It was one of the most memorable, varied and enjoyable
>dark sky sessions that I've had in quite some time.
>
>With a pleasant and relaxing two hour drive through the Renfrew
>area, heading down highway 41... beautiful weather with autumn
>colours beginning to show, I arrived to the airstrip just after
>6PM. Greeted by Chris, Jim, Richard and Randy along with a variety
>of scopes. Later on, Ivan and his son Nicholas, as well as Sanjeev
>and Shane showed up. An impressive turnout for a weeknight, but not
>too surprising as the weather forecast was highly promising!
>
>What an interesting night full of surprises! At dusk, Chris Thuemen
>pointed out an interesting atmospheric phenomena of radial shape
>diverging from the setting Sun, that had various shades from teal to
>deep blue. It was subtle but I also have never seen anything like
>that before. I then switched my attention to photographing the thin
>crescent Moon and Venus in the western sky, a beautiful sight. As
>the sky grew darker, another phenomena appeared... the unmistakable
>"glow arc" of aurora over the northern horizon. It was just a very
>uniform glow, a perfect arch. But not too long later, this glow
>turned into a magnificent and very colourful aurora... with flaring
>spikes, moving curtains! Wow!! Bright greens at the base and pale
>reds at the tops. The biggest surprise was the sight of a brilliant
>and slow moving sporadic meteor, gracefully cutting across the
>brightest part of the aurora! It was well seen and photographed by
>many of us too! Here's the photos I took. (Yo
> u'll find the details in the captions underneath each photo):
>http://pmartin.smugmug.com/Other/Nirvana-on-October-8-2013/
>The aurora was very active for about an hour, then it subsided into
>a dimmer display near the horizon. I decided to sign-on for meteor
>observing, and face the north-west to look for possible
>Draconids. While that particular shower turned out being nearly
>quiet, sporadic activity was a different story. After a normal
>first hour, the second one surged with sporadics literally flying
>left and right! Nine of them were seen within eight minutes,
>shortly after midnight, including two simultaneous meteors. A few
>seemed to emanate from the general direction of Auriga but I was not
>able to pin point a precise radiant. Here's my meteor data:
>
>October 8/9 2013, 02:20-04:22 UT (22:20-00:22 EDT)
>Location: Irvine Lake airstrip (Nirvana), Ontario, Canada
>(Long: -76 deg 29'; Lat: 45 deg 23')
>
>Observed showers:
>Draconids (GIA) - 17:28 (262) +56
>Southern Taurids (STA) - 01:56 (029) +08
>
>Period 1: 02:20-03:20 UT; clear; F 1.00; LM 6.80; facing NW50 deg;
>teff 1.00 hr.
>GIA: one: +2
>STA: none
>Sporadics: seven: -1; +1; +2; +3; +4(2); +5
>Total meteors: eight
>
>Period 2: 03:20-04:22 UT; clear; F 1.00; LM 6.80; facing NW50 deg;
>teff 1.01 hr.
>GIA: none
>STA: one: +1
>Sporadics: eighteen: 0; +1(2); +2; +3(5); +4(5); +5(4)
>Total meteors: nineteen
>
>I spent the rest of the night with telescope observing. The seeing
>conditions were excellent, and I had a terrific time with my 12.5"
>dob right up until the end even though fog patches occasionally
>interfered. It was also great to move around the site, and share
>what others were seeing and imaging.
>
>Highlights with my 12.5" dob: The Veil nebula with OIII filter,
>three comets (2P Encke, C/2013 R1 Lovejoy and C/2012 S1 ISON), the
>Orion nebula and of course Jupiter in the morning sky, displaying
>many fine features during moments of excellent seeing! As for comet
>ISON, the anticipation caused more excitement than the actual
>viewing. It was visible in the 12.5" as a dim elongated object. It
>was equally difficult in a nearby 18" dob - but visible! It'll be
>interesting to watch the comet as it approaches the Sun and
>brightens in the coming weeks. It still has a long way to go before
>becoming "great".
>
>At the end of the night, the temperature was down to 0C, with heavy
>dew/frost. I wrapped myself up in a warm sleeping bag and slept
>well until mid-morning. We had enough fun that we're thinking of
>getting out there again next New Moon!
>
>Clear skies,
>
>Pierre Martin
>Ottawa, Ontario
>
>
>
>
>------------------------------
>
>Message: 4
>Date: Mon, 14 Oct 2013 01:31:51 -0400 (EDT)
>From: Skywayinc at aol.com
>Subject: Re: (meteorobs) Observation October 8/9 2013
>To: meteorobs at meteorobs.org
>Message-ID: <42c89.472ed59b.3f8cdbc7 at aol.com>
>Content-Type: text/plain; charset="us-ascii"
>
>In a message dated 10/14/2013 12:58:43 A.M. Eastern Daylight Time,
>pmartin at teksavvy.com writes:
>
>
>As for comet ISON, the anticipation caused more excitement than the actual
>viewing. It was visible in the 12.5" as a dim elongated object. It was
>equally difficult in a nearby 18" dob - but visible! It'll be interesting
>to watch the comet as it approaches the Sun and brightens in the coming
>weeks. It still has a long way to go before becoming "great".
>
>
>
>Hi Pierre --
>
>Can you provide an estimate (or even a "guesstimate") of how bright ISON
>appeared to you?
>What would you have assigned it so far a total magnitude was concerned?
>
>Many thanks!
>-- joe
>
>
>Joe Rao
>Night Sky columnist
>SPACE.com
>
>
>-------------- next part --------------
>An HTML attachment was scrubbed...
>URL:
>http://lists.meteorobs.org/pipermail/meteorobs/attachments/20131014/93562a88/attachment-0001.html
>
>
>------------------------------
>
>_______________________________________________
>meteorobs mailing list
>meteorobs at meteorobs.org
>http://lists.meteorobs.org/mailman/listinfo/meteorobs
>
>
>End of meteorobs Digest, Vol 29, Issue 13
>*****************************************
More information about the meteorobs
mailing list