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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848341498785749 2.4511e-08  
a 2.60128979035863 1.14e-08 au
q 2.120482603369876 6.722e-08 au
i 14.40029892826154 1.0428e-06 deg
node 52.11098883813525 2.8812e-06 deg
peri 315.674255927477 4.0528e-06 deg
M 26.32368047442303 5.9236e-06 deg
tp 2459284.446444536931
(2021-Mar-10.94644454)
2.4821e-05 TDB
period 1532.433126359354
4.20
1.0074e-05
2.758e-08
d
yr
n .2349205285422552 1.5443e-09 deg/d
Q 3.082096977347383 1.3508e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2468  
   data-arc span      12124 days (33.19 yr)  
   first obs. used      1987-10-27  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3839  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:44:08  

Additional Information
 Earth MOID = 1.14519 au 
 Jupiter MOID = 2.43556 au 
 T_jup = 3.346 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457317.5 (2015-Oct-22.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1862748235764388 2.4456e-08  
q 2.116085732510538 6.7169e-08 au
tp 2457753.741450646928
(2016-Dec-31.24145065)
2.1317e-05 TDB
node 52.16945411686402 2.8786e-06 deg
peri 316.0687747923822 4.0424e-06 deg
i 14.41387614272125 1.0433e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2468  
   data-arc span      12124 days (33.19 yr)  
   first obs. used      1987-10-27  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3839  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:44:08  

Additional Information
 Jupiter MOID = 2.43556 au 
 T_jup = 3.346 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.981144543388909E-16 -1.62844281535563E-15 -3.000467320789223E-13 -2.931498181217286E-15 -1.642577694991046E-14 1.981244666181983E-16
q -1.62844281535563E-15 4.511668699785194E-15 8.091078790130258E-13 8.922699395666048E-15 3.69517341281019E-14 -8.224523485991697E-16
tp -3.000467320789223E-13 8.091078790130258E-13 4.544031158322039E-10 1.349601803408158E-11 5.59534336984745E-11 -7.13652287209622E-12
node -2.931498181217286E-15 8.922699395666048E-15 1.349601803408158E-11 8.286619367853753E-12 -5.685376722367691E-12 -5.819626669284893E-13
peri -1.642577694991046E-14 3.69517341281019E-14 5.59534336984745E-11 -5.685376722367691E-12 1.634076717530263E-11 -7.312878917647319E-13
i 1.981244666181983E-16 -8.224523485991697E-16 -7.13652287209622E-12 -5.819626669284893E-13 -7.312878917647319E-13 1.088517804842669E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.97   n/a E2021B10  
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. 2020-October); 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.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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

Alternate Designations
 1987 UN = 1991 TC1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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