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9513 (1971 UN)
Classification: Main-belt Asteroid          SPK-ID: 2009513
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2369716816167954 4.9082e-08  
a 2.452975728919571 9.9343e-09 au
q 1.871689945472316 1.1928e-07 au
i 7.715793132128858 4.1904e-06 deg
node 37.06669333399524 3.0875e-05 deg
peri 296.0942390766269 3.1707e-05 deg
M 273.1876414510654 8.1513e-06 deg
tp 2459338.889873584014
(2021-May-04.38987358)
3.2394e-05 TDB
period 1403.260509522696
3.84
8.5246e-06
2.334e-08
d
yr
n .2565453795335909 1.5585e-09 deg/d
Q 3.034261512366827 1.2288e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2025  
   data-arc span      26024 days (71.25 yr)  
   first obs. used      1948-11-03  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45224  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:21:10  

Additional Information
 Earth MOID = .877598 au 
 Jupiter MOID = 2.38804 au 
 T_jup = 3.443 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO435790  
diameter diameter 10.092 km 5.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.091   0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

9513 (1971 UN)          Discovered 1971-Oct-26 by Kohoutek, L. at Bergedorf
Reference: 19981110/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1971 UN = 1990 SR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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