11 replies to this topic

[steveareno225]

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:

 

• Orbital Elements (JPL)
• Goldstone Radar Observations Planning: (357439) 2004 BL86
• (357439) 2004BL86 Ephemerides for 25 January 2015 through 29 January(NEODyS-2)
• Goldstone Asteroid Schedule
• Absolute Magnitude (H)
• Wikipedia

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[Kidastronomer]

Wonder if the weather will allow me to see it.

[Dave Mitsky]

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

[steveareno225]

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

[steveareno225]

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

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

[steveareno225]

 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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[Dave Mitsky]

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

[Glen A W]

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

[Kidastronomer]

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.

[Glen A W]

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

[Kidastronomer]

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

[Dave Mitsky]

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