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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1772414759429976 4.5915e-08  
a 3.095314052005406 1.9737e-08 au
q 2.546696020920867 1.4237e-07 au
i 1.11377782500443 5.0674e-06 deg
node 145.7140219721153 0.00026555 deg
peri 285.3448167005522 0.00026605 deg
M 108.4744710695801 1.4587e-05 deg
tp 2457001.149949548929
(2014-Dec-09.64994955)
8.0005e-05 JED
period 1989.094909013054
5.45
1.9025e-05
5.209e-08
d
yr
n .1809868389732213 1.7311e-09 deg/d
Q 3.643932083089945 2.3235e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1609  
   data-arc span      22397 days (61.32 yr)  
   first obs. used      1954-12-21  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51393  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:52:31  

Additional Information
 Earth MOID = 1.55987 au 
 Jupiter MOID = 1.65442 au 
 T_jup = 3.199 
[ 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 12.2 mag n/a MPO358684  

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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