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5550 (1981 UB1)
Classification: Main-belt Asteroid          SPK-ID: 2005550
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1752482323329505 5.2559e-08  
a 3.092752510114202 2.9333e-08 AU
q 2.550753099673392 1.6806e-07 AU
i 1.111086926722129 6.3832e-06 deg
node 145.6736121829106 0.00031208 deg
peri 285.3063091673493 0.0003125 deg
M 323.832057135268 2.1519e-05 deg
tp 2457000.089406220664
(2014-Dec-08.58940622)
0.00012022 JED
period 1986.626292464737
5.44
2.8263e-05
7.738e-08
d
yr
n .1812117363821661 2.578e-09 deg/d
Q 3.634751920555011 3.4474e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1164  
   data-arc span      21533 days (58.95 yr)  
   first obs. used      1954-12-21  
   last obs. used      2013-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54703  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:13:23  

Additional Information
 Earth MOID = 1.56465 AU 
 T_jup = 3.200 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1 mag n/a MPO267730  

5550 (1981 UB1)          Discovered 1981-Oct-30 by Taff, L. G. at Socorro
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 UB1 = 1975 RQ2 = 1977 AM = 1981 SP5 = 1983 CP2 = 1986 WD8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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