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442449 (2011 UR208)
Classification: Main-belt Asteroid          SPK-ID: 2442449
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2079751333151482 1.4936e-07  
a 2.731522461141351 9.0868e-08 au
q 2.163433713132157 4.6756e-07 au
i 3.128410081661516 7.2835e-06 deg
node 280.4876667112408 0.00010945 deg
peri 39.30039716815454 0.00011194 deg
M 16.75462650341347 3.1662e-05 deg
tp 2458923.757164573292
(2020-Mar-15.25716457)
0.00014175 TDB
period 1648.942800842877
4.51
8.2282e-05
2.253e-07
d
yr
n .2183217027394653 1.0894e-08 deg/d
Q 3.299611209150545 1.0977e-07 au
  Orbit Determination Parameters
   # obs. used (total)      95  
   data-arc span      3304 days (9.05 yr)  
   first obs. used      2010-05-16  
   last obs. used      2019-06-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5285  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:12  

Additional Information
 Earth MOID = 1.15154 au 
 Jupiter MOID = 2.02201 au 
 T_jup = 3.320 
[ 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 17.4   n/a MPO434643  
diameter diameter 2.548 km 0.411 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.030   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

442449 (2011 UR208)          Discovered 2010-May-16 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 UR208 = 2010 PW40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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