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JPL Small-Body Database Browser
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268705 (2006 HB21)
Classification: Outer Main-belt Asteroid          SPK-ID: 2268705
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09381705551759217 5.9092e-08  
a 3.211820129591997 4.1041e-08 au
q 2.910496622181544 1.9639e-07 au
i 5.157257614435312 7.3173e-06 deg
node 78.5000127399925 7.6923e-05 deg
peri 52.25943561328695 8.6646e-05 deg
M 164.3122292181128 4.0399e-05 deg
tp 2457640.894701397579
(2016-Sep-09.39470140)
0.00023162 TDB
period 2102.447937933463
5.76
4.0298e-05
1.103e-07
d
yr
n .1712289724300384 3.2819e-09 deg/d
Q 3.513143637002449 4.4891e-08 au
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      7113 days (19.47 yr)  
   first obs. used      2000-03-03  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55112  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:38:44  

Additional Information
 Earth MOID = 1.92946 au 
 Jupiter MOID = 1.54972 au 
 T_jup = 3.178 
[ 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 15.6   n/a MPO450150  
diameter diameter 3.923 km 0.911 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.066   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

268705 (2006 HB21)          Discovered 2006-Apr-20 by Spacewatch at Kitt Peak
Reference: 20110319/Numbers.arcLast Updated: 2011-03-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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