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(357439) 2004 BL86 will flyby on 27 January 2015

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#1 steveareno225

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Posted 20 December 2014 - 08:32 PM

The NEO (357439) 2004 BL86  (Orbit type: Apollo ) (estimated to be 440–1000 meters in diameter) will safely make a Close-Approach  of  3.1 Lunar Distance on 27 January 2015. This will be the closest "known" Approach by something this large (H = 18.8) until 2027,  and may will briefly peak at around apparent magnitude 9. It has been  schedule for Goldstone Observations.

 

 

links:

 

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  • The NEO (357439) 2004 BL86 -2014-12-20.jpg


#2 Kidastronomer

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Posted 20 December 2014 - 08:46 PM

Wonder if the weather will allow me to see it.

#3 Dave Mitsky

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Posted 21 December 2014 - 01:56 AM

Thanks for that information.  Where will the NEO be in the sky at maximum magnitude and will it be nighttime for the United States?

 

Dave Mitsky



#4 steveareno225

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Posted 21 December 2014 - 02:17 AM

Wonder if the weather will allow me to see it.

I hope the  weather be will be clear...I hope  the  weather be will letter this week at Siding Spring - Australia so I can get more DATA :)

 

Thanks for that information.  Where will the NEO be in the sky at maximum magnitude and will it be nighttime for the United States?

 

Dave Mitsky

yese  check out the The Minor Planet Center's  Minor Planet & Comet Ephemeris Service http://www.minorplan...PEph/MPEph.html



#5 steveareno225

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Posted 29 December 2014 - 10:44 AM

after many cloudy nights at Siding Spring - Australia I was able to get more DATA


Edited by steveareno225, 29 December 2014 - 11:15 AM.


#6 steveareno225

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Posted 29 December 2014 - 10:46 AM

 The NEO (357439) 2004 BL86 (Orbit type: Apollo ) from Siding Spring - Australia - MPC Q62 on 2014-12-29 3 stacks of 6 of 60 Second Luminance BIN2 (Sky Motion 0.549"/min P.A.98.4, 0.556"/min P.A.98.1, 0.562"/min P.A.97.8) taken with ((TEL T30 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer)

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  • The NEO (357439) 2004 BL86  (Orbit type Apollo ) from Siding Spring - Australia - MPC Q62 on 2014-12-29.jpg


#7 Dave Mitsky

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Posted 29 December 2014 - 12:04 PM

There's an article on the 2004 BL86 flyby on pages 50 and 51 of the February issue of Sky & Telescope.  According to the article, observers in North and South America, Europe, and Africa will have the best views of the NEO, from 1:00 to 6:00 UT (8:00 p.m. to 1:00 a.m. EST) on January 27th.  During that time, it will be heading northeastward through Cancer and will pass through the eastern boundary of M44 at 5:00 UT.  2004 BL86 will be traveling at approximately two arc seconds per second so its motion should be apparent in real time.

 

Dave Mitsky



#8 Glen A W

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Posted 01 January 2015 - 01:43 AM

I observed the close approacher of November a couple of years ago... 2005 YU55, I think.  It was one of the most challenging objects I have ever observed, because it was dim and really trucking.  Finally, I staked out a patch in Pegasus (if I recall correctly) and waited for it to pass by a couple of stars.  A dim little speck.  This was really one where you can only brag that you managed to see it.

 

Glen



#9 Kidastronomer

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Posted 01 January 2015 - 09:17 AM

I observed the close approacher of November a couple of years ago... 2005 YU55, I think.  It was one of the most challenging objects I have ever observed, because it was dim and really trucking.  Finally, I staked out a patch in Pegasus (if I recall correctly) and waited for it to pass by a couple of stars.  A dim little speck.  This was really one where you can only brag that you managed to see it.

 

Glen

To the general public.



#10 Glen A W

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Posted 01 January 2015 - 11:02 AM

Most of the non-astronomy people I know have no concept of these things and don't understand, or perhaps believe, that I am seeing them every clear night.

 

Glen



#11 Kidastronomer

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Posted 14 January 2015 - 09:27 AM

It appears that the night before and the night after the close approach the asteroid is still rather bright (10th magnitude - 11th magnitude).



#12 Dave Mitsky

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Posted 17 January 2015 - 12:26 PM

Some recent articles on the flyby:

http://www.astronomy...fely-january-26

http://earthsky.org/...e-on-january-26

http://www.universet...your-telescope/

Dave Mitsky


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