* Astronomy

Members Login
Post Info TOPIC: Comet C/2007 W1 (Boattini)


L

Posts: 131433
Date:
The Daytime Craterids
Permalink  
 


Title: The Daytime Craterids, a radar-detected meteor shower outburst from hyperbolic comet C/2007 W1 (Boattini)
Authors: Wiegert, P. A.; Brown, P. G.; Weryk, R. J.; Wong, D. K.

We report a new daytime meteor shower detected with the Canadian Meteor Orbit Radar (CMOR). This shower has a radiant in the southern constellation Crater. The Daytime Craterid shower was observed in 2003 and 2008 but not in any of the other years in the 2002-09 interval. The strength of this shower in the years observed is equivalent to a daily averaged zenithal hourly rate (ZHR) over 30, with a peak ZHR likely much higher at the time of the outburst. The orbital elements of the shower closely match those of Comet C/2007 W1 (Boattini), which passed perihelion in 2007. The orbit of C/2007 W1 is nominally hyperbolic orbit making this the first meteor shower detected from a clearly unbound comet. The 2003 outburst of the Daytime Craterid shower indicates that this comet must have recently been transferred to an unbound orbit from a bound one, likely through a close encounter with a giant planet. As a result we conclude that this shower provides us with one of the few examples of showers originating from the population of nearly isotropic comets. The stream is difficult to model owing to its proximity to the orbits of Jupiter, Saturn and the Earth. However, the intermittent nature of the shower can be largely understood from numerical simulations. No outbursts of similar strength are expected in the next decade, with the possible exception of 2015.

Read more



__________________


L

Posts: 131433
Date:
RE: Comet C/2007 W1 (Boattini)
Permalink  
 


Ephemeris
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2008 07 03    03 37.98   +00 39.1    0.299    0.863    51.5   112.8   6.2
2008 07 08 03 22.27 +04 42.8 0.336 0.884 57.7 103.6 6.6
2008 07 13 03 11.36 +08 07.9 0.374 0.914 63.6 94.9 7.0
2008 07 18 03 03.61 +11 01.5 0.412 0.951 69.1 87.0 7.4
2008 07 23 02 57.76 +13 29.7 0.448 0.995 74.5 79.8 7.7
2008 07 28 02 52.89 +15 37.1 0.482 1.044 79.8 73.2 8.1


__________________


L

Posts: 131433
Date:
Permalink  
 



__________________


L

Posts: 131433
Date:
Permalink  
 

Comet C/2007 W1 (Boattini) continues to brighten faster than predicted, and has now reached about 6th magnitude. That's bright enough that you can see it without optical aid under excellent conditions, and it should be a relatively easy target through binoculars. The comet currently lies low in the southwestern sky after darkness falls, but it won't stay there long.
Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

2007 w1-2008-5-3-19h20m

__________________


L

Posts: 131433
Date:
Permalink  
 

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2008 05 04    10 41.25   -21 58.7    0.388    1.259   122.3    42.6   8.4
2008 05 09 10 21.35 -22 43.0 0.356 1.198 113.8 50.4 8.0
2008 05 14 09 59.42 -23 29.6 0.326 1.140 105.1 58.9 7.6
2008 05 19 09 34.58 -24 17.2 0.297 1.084 95.9 68.2 7.2
2008 05 24 09 05.52 -25 00.1 0.271 1.031 86.3 78.5 6.8
2008 05 29 08 30.54 -25 25.5 0.247 0.983 76.0 89.9 6.4
2008 06 03 07 48.14 -25 08.6 0.228 0.941 65.0 102.3 6.0
2008 06 08 06 58.46 -23 34.1 0.214 0.906 53.9 115.1 5.7
2008 06 13 06 05.03 -20 13.3 0.210 0.878 44.4 125.9 5.5
2008 06 18 05 14.43 -15 16.2 0.218 0.859 39.5 131.2 5.5
2008 06 23 04 32.34 -09 36.3 0.236 0.850 40.4 129.2 5.7
2008 06 28 04 00.59 -04 08.7 0.265 0.852 45.3 121.9 5.9


__________________


L

Posts: 131433
Date:
Permalink  
 

The comet is expected to reach magnitude 4.5 in late June  when it passes 8.5 from the Sun.

 MPC 62271

__________________


New

Posts: 2
Date:
Permalink  
 

Thank you!

__________________


L

Posts: 131433
Date:
Permalink  
 

Hi,
sry for the late reply (i was partying hard).

Yeah, the comet is moving through Virgo towards the constellation Corvus just now.
I have includes a picture that shows the coordinates from Nov 26th to Dec 26th...

Comet C2007 W1 (Boattini)

Comet C2007 W1.kmz
Google sky file (2kb, kmz)

-- Edited by Blobrana at 14:46, 2008-01-12

__________________


New

Posts: 2
Date:
Permalink  
 

Sorry for my ignorance, but exactly WHERE is the comet? Can you give me a reference constellation?

Thanks,

Jeff

__________________
1 2  >  Last»  | Page of 2  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard