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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1752832931844976 5.2233e-08  
a 3.09275928331231 2.139e-08 AU
q 2.550650251106401 1.6473e-07 AU
i 1.111091588234829 5.3342e-06 deg
node 145.6748019235969 0.00030475 deg
peri 285.3390158240786 0.00030525 deg
M .05151716322361952 1.5334e-05 deg
tp 2457000.215706424496
(2014-Dec-08.71570642)
8.4617e-05 JED
period 1986.632818603234
5.44
2.061e-05
5.643e-08
d
yr
n .1812111410970798 1.88e-09 deg/d
Q 3.634868315518218 2.514e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1273  
   data-arc span      21949 days (60.09 yr)  
   first obs. used      1954-12-21  
   last obs. used      2015-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53601  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:13:40  

Additional Information
 Earth MOID = 1.56509 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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