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JPL Small-Body Database Browser
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56013 (1998 UB21)
Classification: Main-belt Asteroid          SPK-ID: 2056013
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2701973043368909 3.6179e-08  
a 2.321823424200846 8.5965e-09 au
q 1.694472993835528 8.4097e-08 au
i 21.58129629815884 5.7717e-06 deg
node 227.213131214885 1.0722e-05 deg
peri 259.5114639702353 1.448e-05 deg
M 344.8092572958681 1.0158e-05 deg
tp 2459055.027892994345
(2020-Jul-24.52789299)
3.6574e-05 TDB
period 1292.237111792088
3.54
7.1767e-06
1.965e-08
d
yr
n .2785866438247918 1.5472e-09 deg/d
Q 2.949173854566164 1.0919e-08 au
  Orbit Determination Parameters
   # obs. used (total)      996  
   data-arc span      12789 days (35.01 yr)  
   first obs. used      1985-01-21  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48796  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 11:40:10  

Additional Information
 Earth MOID = .843575 au 
 Jupiter MOID = 2.58984 au 
 T_jup = 3.437 
[ 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 15.1   n/a MPO502528  
diameter diameter 2.662 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.211   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56013 (1998 UB21)          Discovered 1998-Oct-29 by Korlevic, K. at Visnjan
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UB21 = 1991 XW3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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