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JPL Small-Body Database Browser
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20221 (1997 HV8)
Classification: Main-belt Asteroid          SPK-ID: 2020221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09857026125820766 5.4706e-08  
a 3.098252591215322 1.9243e-08 au
q 2.792857023855309 1.6733e-07 au
i 1.818451441376395 5.2113e-06 deg
node 64.36160612761113 0.00016875 deg
peri 118.7146617112805 0.00017058 deg
M 38.5114697154382 2.4925e-05 deg
tp 2458387.410891994764
(2018-Sep-25.91089199)
0.00013744 TDB
period 1991.928104762342
5.45
1.8558e-05
5.081e-08
d
yr
n .1807294144499015 1.6838e-09 deg/d
Q 3.403648158575336 2.114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      893  
   data-arc span      8961 days (24.53 yr)  
   first obs. used      1994-10-26  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5938  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:50:27  

Additional Information
 Earth MOID = 1.7961 au 
 Jupiter MOID = 1.5545 au 
 T_jup = 3.214 
[ 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 14.6   n/a MPO266062  
diameter diameter 5.264 km 0.272 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20221 (1997 HV8)          Discovered 1997-Apr-30 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 HV8 = 1994 UZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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