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6000 United Nations (1987 UN)
Classification: Main-belt Asteroid          SPK-ID: 2006000
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1854545242108545 3.7713e-08  
a 2.602893068493886 1.2309e-08 au
q 2.120174772904622 1.02e-07 au
i 14.40211343020245 3.9379e-06 deg
node 52.14807252400186 1.5992e-05 deg
peri 315.5958311162367 1.924e-05 deg
M 293.3991375509446 1.2773e-05 deg
tp 2459284.265941960488
(2021-Mar-10.76594196)
5.5377e-05 TDB
period 1533.850093666834
4.20
1.088e-05
2.979e-08
d
yr
n .2347035094801091 1.6648e-09 deg/d
Q 3.085611364083151 1.4592e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2281  
   data-arc span      11972 days (32.78 yr)  
   first obs. used      1987-10-27  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39476  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:34:56  

Additional Information
 Earth MOID = 1.14571 au 
 Jupiter MOID = 2.4304 au 
 T_jup = 3.345 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.9   n/a MPO337304  
diameter diameter 11.000 km 0.295 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.262 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Bennefeld, C. (2011) http://www.bennefeld.org/astronomy/]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.211   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6000 United Nations (1987 UN)          Discovered 1987-Oct-27 by Jensen, P. at Brorfelde
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 UN = 1991 TC1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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