K-Tec

New Naked Eye Comet - 17/P Holmes

  • Neill
  • Neill's Avatar Topic Author
  • Offline
  • IFAS Astronomer of the Year 2011
  • IFAS Astronomer of the Year 2011
  • Posts: 665
  • Thank you received: 792

New Naked Eye Comet - 17/P Holmes was created by Neill

Hello all,

Received the below report from BAA. Comet 17/P Holmes has undergone a superoutburst, it was predicted to be mag +17 but is now naked eye at +3.8. Report is below, also see links inc finder chart.

www.aerith.net/comet/weekly/current.html
www.aerith.net/comet/catalog/0017P/2007.html

BAA electronic bulletin No. 00313 www.britastro.org/======================...====================
In the past 24 hours, a spectacular event has taken place involving the periodic comet P/Holmes (17P). Its predicted brightness is about magnitude 17 however last night it was discovered by the Spanish amateur, Juan Antonio Henríquez Santana to have undergone a tremendous outburst having attained magnitude 10 at that time (Oct 24 0h UT). It was a similar outburst in 1892 that led to its discovery. Latest reports (Seiichi Yoshida, Oct 24 13h UT) indicate that it is stellar in appearance and 3RD MAGNITUDE in brightness: so bright in fact that it is readily visible to the unaided eye. That's almost one million times brighter than normal ! Fortunately for UK-based observers the comet is well placed for observation and is visible throughout the entire night. Its position at 0h UT tonight (Oct 24/25) will be: R.A. 03h 53.0m, Dec. +50 08' Its appearance will probably be that of a fairly bright naked-eye star moving at an apparent rate of close to 10 arcmin per day at PA 298 deg. It is currently 1.63 AU (245 million km) from the Earth. Observations are strongly encouraged and should be reported to Jonathan Shanklin, Director of the Comet Section.

Clear Skies

Richard Miles

Neill
Linda: "All in all, this is one day Mittens the kitten won't soon forget."
Morbo: "Kittens give Morbo gas."
15 years 1 month ago #53038

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

That is amazing, from mag 17 to 3.8! From the charts given, it looks like we should be able to spot it in Perseus. With the Moon getting brighter at the opposite side of the sky, it might prove to be slightly difficult if it is quite diffuse. Weather prospects look good outside right now...

Seanie.
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 1 month ago #53040

Please Log in or Create an account to join the conversation.

  • Posts: 4173
  • Thank you received: 181

Replied by albertw on topic Re: New Naked Eye Comet - 17/P Holmes

That is amazing, from mag 17 to 3.8!


It just went past the interplanetary 'Please Turn your Headlights on' sign.
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
15 years 1 month ago #53049

Please Log in or Create an account to join the conversation.

  • Posts: 2676
  • Thank you received: 544

Replied by Keith g on topic Re:

Yes!!! This is why I love this hobby, it's full of surprises! Hopefully tonight will be clear. It very near the brightest star in Perseus......more to come....

Keith..
If a telescope can fit into your backyard it's too small. If you can't move it, it's too big." -- John Dobson
15 years 1 month ago #53050

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

That is amazing, from mag 17 to 3.8!


It just went past the interplanetary 'Please Turn your Headlights on' sign.


Does "Links Fahren/Drive on Left" work to keep it visible around our latitude? ;)
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 1 month ago #53051

Please Log in or Create an account to join the conversation.

  • Posts: 777
  • Thank you received: 18

Replied by TrevorDurity on topic Re: New Naked Eye Comet - 17/P Holmes

Cool! Would love to get a look at that. It's been clear for for a couple of hours, so I hope it holds up.

Thanks for the heads up Neill!
15 years 1 month ago #53052

Please Log in or Create an account to join the conversation.

  • johnflannery
  • Offline
  • IFAS Astronomer of the Year 2004
  • IFAS Astronomer of the Year 2004
  • Posts: 1191
  • Thank you received: 253

Replied by johnflannery on topic Re: New Naked Eye Comet - 17/P Holmes

Many thanks for the info Neill :D

Gary Kronk's "Cometography" page has some historic information about the comet -- cometography.com/pcomets/017p.html
John Flannery ( aurorawatcher - at * gmail - dot * com ... remove hyphens/asterisks/spaces for email)
The chicken's motive for crossing the road would not be questioned in an ideal world
15 years 1 month ago #53055

Please Log in or Create an account to join the conversation.

  • Posts: 3298
  • Thank you received: 57

Replied by Frank Ryan on topic Re: New Naked Eye Comet - 17/P Holmes

Sweet.
Must take a look at that tonight.
Its sort of clear here tonight.
Anyone got a visual x marks the spot for tonight?
My Astrophotography
Shannonside Astronomy Club __________________________________________
Meade ETX-125PE, Bresser 10 x 50 Binos & Me Peepers
15 years 1 month ago #53056

Please Log in or Create an account to join the conversation.

  • Posts: 3298
  • Thank you received: 57

Replied by Frank Ryan on topic Re: New Naked Eye Comet - 17/P Holmes

It very near the brightest star in Perseus....


Mirphak?
My Astrophotography
Shannonside Astronomy Club __________________________________________
Meade ETX-125PE, Bresser 10 x 50 Binos & Me Peepers
15 years 1 month ago #53058

Please Log in or Create an account to join the conversation.

  • Posts: 777
  • Thank you received: 18

Replied by TrevorDurity on topic Re: New Naked Eye Comet - 17/P Holmes

I was finding it hard to figure out where exactly it would be as well. Looks like it should be less than a degree away from Delta Persei at the 10 o'clock position.

There's a closeup map on this site

www.shopplaza.nl/astro/ -just click "comets-charts"

Cheers,

Trev
15 years 1 month ago #53059

Please Log in or Create an account to join the conversation.

  • paulevans
  • paulevans's Avatar
  • Visitor
  • Visitor

Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes

Gotcha!

Dead centre here...



P.
15 years 1 month ago #53061

Please Log in or Create an account to join the conversation.

  • Posts: 777
  • Thank you received: 18

Replied by TrevorDurity on topic Re: New Naked Eye Comet - 17/P Holmes

Nice one Paul! Geez you're on the ball :wink:
15 years 1 month ago #53062

Please Log in or Create an account to join the conversation.

  • michaeloconnell
  • michaeloconnell's Avatar
  • Offline
  • IFAS Astronomer of the Year 2009
  • IFAS Astronomer of the Year 2009
  • Posts: 6319
  • Thank you received: 298

Replied by michaeloconnell on topic Re: New Naked Eye Comet - 17/P Holmes

Just spotted it! Looks like an extra "star" in Perseus. Very easy to see with the naked eye, even with the moonlight. Looked like a dense globular cluster with the 16".
15 years 1 month ago #53063

Please Log in or Create an account to join the conversation.

  • Posts: 4173
  • Thank you received: 181

Replied by albertw on topic Re: New Naked Eye Comet - 17/P Holmes

Just spotted it! Looks like an extra "star" in Perseus. Very easy to see with the naked eye, even with the moonlight. Looked like a dense globular cluster with the 16".


See thats why I'm back in looking at maps! I cant see a comet just a star that shouldn't be there. Good to hear I'm actually looking at the right thing!
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
15 years 1 month ago #53066

Please Log in or Create an account to join the conversation.

  • Posts: 4173
  • Thank you received: 181

Replied by albertw on topic Re: New Naked Eye Comet - 17/P Holmes

It very near the brightest star in Perseus....


Mirphak?


Bout quarter of the way from Mirphak to Capella. Its the star that shouldn't be there.
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
15 years 1 month ago #53067

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

Damned fog and high cloud... :x
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 1 month ago #53068

Please Log in or Create an account to join the conversation.

  • Posts: 2676
  • Thank you received: 544

Replied by Keith g on topic Re:

Wow!!!!! This is the single most strangest comet I have ever seen in my Life, earlier today, an alert went out that this comet had suddenly brighened from a predicted magnitude 17 to magnitude 3 - incredible, I wonder how this has happened? I quickly set up my 15x70mm binoculars and I easily found it in the constellation Perseus, just about 5 degrees from Alpha Persei at magnitude 1.8, also the star Delta Persei is at magnitude 3.0, from these two stars, I can see the comet at about magnitude 2.5 !!!!! I could immediately see that it is very much yellow in colour, just like the planet Saturn, and it is definitely non star like, with a slighty elongated shape east-west, with no sign of a tail, especially since the near full moon is shining brightly.

This can easily be mistaken for a nova, and is easily visible with the naked eye ! Here is a quick shot that I took.....this will grab many headlines over the next few days...

Keith....
If a telescope can fit into your backyard it's too small. If you can't move it, it's too big." -- John Dobson
15 years 1 month ago #53069

Please Log in or Create an account to join the conversation.

  • paulevans
  • paulevans's Avatar
  • Visitor
  • Visitor

Replied by paulevans on topic Re: New Naked Eye Comet - 17/P Holmes

Nice shot Keith - I agree - it's brighter than Delta Persei so 2.5 seems about right!
15 years 1 month ago #53070

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

Very nice shots Keith and Paul, your images helped me locate it in between cloud breaks with the 10 X 50's.

It has gotten to the stage here tonight that I am surrounded by 4 outside 'nightlights' from the neighbours, and ESB light to one side, and a new one at the front of my house they put up today. Plus the Moon. Added to that, one of my neighbours smells like they're having fire trouble - my fog here has turned to smog. Light rays everywhere, and not-too-dense high altitude cloud...



...think I'll give up now, as this fog is only going to get worse here!

:(

Seanie.
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 1 month ago #53071

Please Log in or Create an account to join the conversation.

  • Posts: 4173
  • Thank you received: 181

Replied by albertw on topic Re: New Naked Eye Comet - 17/P Holmes

Nice shot Keith - I agree - it's brighter than Delta Persei so 2.5 seems about right!


I thought it was about the same to be honest, though the colour difference could by swaying my opinion.

I know outgassing can cause a brightening, but by this amount?

The comet is roughly twice as far out as Mars at the moment which gives an indication of of how bright it must be. It would be interesting to compare the size and brightness with Mars later on tonight.
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
15 years 1 month ago #53072

Please Log in or Create an account to join the conversation.

  • Posts: 9637
  • Thank you received: 544

Replied by Seanie_Morris on topic Re: New Naked Eye Comet - 17/P Holmes

If it's that bright, at that distance, I wonder if we could have another Hale-Bopp event on our hands? It sure would be great...
Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.
15 years 1 month ago #53074

Please Log in or Create an account to join the conversation.

  • DaveGrennan
  • DaveGrennan's Avatar
  • Offline
  • IFAS Astronomer of the Year 2010
  • IFAS Astronomer of the Year 2010
  • Posts: 2707
  • Thank you received: 32

Replied by DaveGrennan on topic Re: New Naked Eye Comet - 17/P Holmes

Incredible, easily mag +1 -2 now!!
Regards and Clear Skies,

Dave.
J41 - Raheny Observatory.
www.webtreatz.com
Equipment List here
15 years 1 month ago #53075

Please Log in or Create an account to join the conversation.

  • Posts: 607
  • Thank you received: 129

Replied by JohnONeill on topic Re: New Naked Eye Comet - 17/P Holmes

Hi
Amazing sight! made it mag 3.0 at 18.55 UT 24th Oct 2007 (however thin cloud present). Visible to naked-eye.

In 25cm refl using 9mm eyepiece showed extremely bright central disc with bright outer disc and fainter extended area.

I would be grateful to receive any observations (recorded for posterity in Orbit)

Director of Observations
IAS

John
15 years 1 month ago #53076

Please Log in or Create an account to join the conversation.

  • michaeloconnell
  • michaeloconnell's Avatar
  • Offline
  • IFAS Astronomer of the Year 2009
  • IFAS Astronomer of the Year 2009
  • Posts: 6319
  • Thank you received: 298

Replied by michaeloconnell on topic Re: New Naked Eye Comet - 17/P Holmes

Comet definetly shows a very bright nucleus (slightly-elongated perhaps?) with a bright diffuse region surrounding it. Nucleus appears off-centre relative to surrouding material.
15 years 1 month ago #53077

Please Log in or Create an account to join the conversation.

  • Posts: 777
  • Thank you received: 18

Replied by TrevorDurity on topic Re: New Naked Eye Comet - 17/P Holmes

Here's another one. Minolta 7D + Sigma 170-500mm @ 170mm. 10 seconds stopped down to f5.6. Comet is at the bottom.



Trev
15 years 1 month ago #53079

Please Log in or Create an account to join the conversation.

Time to create page: 0.102 seconds
Powered by Kunena Forum