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TOPIC: Asteroid 85770 (1998 UP1)
Blobrana


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Posts: 131433
Date:
Asteroid (85770) 1998 UP1
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The 220 - 500 metre wide asteroid 1998 UP1 will make a close pass (77.7 lunar distances, 0.1997 AU), travelling at 16.98 km/second, to the Earth-Moon system on the 7th October, 2011 @ 18:39 UT ±00:01.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).



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Blobrana


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Posts: 131433
Date:
RE: Asteroid 85770 (1998 UP1)
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The 220 - 500 metre wide asteroid 1998 UP1 will make a close pass (73.2 Lunar Distances, 0.1882 AU), travelling at 17.08 km/s, to the Earth-Moon system on the 7th October, 2010 @ 09:29 UT.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).

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Blobrana


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Posts: 131433
Date:
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The 220 - 500 metre wide asteroid 1998 UP1 will make a close pass (69.1 Lunar Distances, 0.1776 AU), travelling at 17.17 km/s, to the Earth-Moon system on the 7th October, 2009.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).

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Blobrana


L

Posts: 131433
Date:
Asteroid (85770) 1998 UP1
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Orbital elements:
1998 UP1
Id. J. E. Rogers (1999 observations)
Epoch 1999 Aug. 10.0 TT = JDT 2451400.5                 Williams
M  28.22788              (2000.0)            P               Q
n   0.98654610     Peri.  234.44751     -0.33618057     +0.92576216
a   0.9993657      Node    18.43985     -0.58443312     -0.06097717
e   0.3450183      Incl.   33.16818     -0.73852593     -0.37315708
P   1.00           H   20.5           G   0.15           U   5

MPEC 1999 - T52

1998 UP1 is a near Earth, Aten asteroid orbiting at nearly a 1:1 resonance with Earth.

Source

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Blobrana


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Posts: 131433
Date:
Asteroid 85770 (1998 UP1)
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Orbital Elements at Epoch 2454800.5 (2008-Nov-30.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3449310922762138 6.8807e-07  
a .9985876635325036 2.5951e-09 AU
q .6541437300166848 6.8836e-07 AU
i 33.17893126862085 6.4782e-05 deg
node 18.39094094150087 7.7314e-06 deg
peri 234.348844182779 3.1966e-05 deg
M 144.8679361529772 7.0336e-05 deg
tp 2454653.827905471203
(2008-Jul-06.32790548)		 7.1589e-05 JED
period 364.4833731503526
1.00		 1.4208e-06
3.89e-09		 d
yr
n .9876993753882344 3.8501e-09 deg/d
Q 1.343031597048322 3.4902e-09 AU
   Orbit Determination Parameters
   # obs. used (total)      431  
   data-arc span      6569 days (17.98 yr)  
   first obs. used      1990-10-12  
   last obs. used      2008-10-06  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   quality code      0  
   fit RMS      .64149  
   data source      ORB  
   producer      Otto Matic  
   solution date      2008-Nov-17 17:33:22  

Additional Information
 Earth MOID = .0837203 AU 
 T_jup = 5.899 

Source

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