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86872 (2000 HE21)
Classification: Main-belt Asteroid          SPK-ID: 2086872
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374741174944898 4.2637e-08  
a 2.421639541638965 1.145e-08 au
q 2.088726782762388 1.0567e-07 au
i 7.607878317450816 4.3756e-06 deg
node 75.50644031897475 3.6955e-05 deg
peri 318.1339305325723 4.0881e-05 deg
M 306.6497058123476 1.9421e-05 deg
tp 2459204.484418003868
(2020-Dec-20.98441800)
7.4964e-05 TDB
period 1376.45708612397
3.77
9.762e-06
2.673e-08
d
yr
n .2615410270535501 1.8549e-09 deg/d
Q 2.754552300515543 1.3024e-08 au
  Orbit Determination Parameters
   # obs. used (total)      896  
   data-arc span      7402 days (20.27 yr)  
   first obs. used      2000-04-27  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56093  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:02:47  

Additional Information
 Earth MOID = 1.10285 au 
 Jupiter MOID = 2.66046 au 
 T_jup = 3.488 
[ 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 15.2   n/a MPO337911  
diameter diameter 1.899 km 0.429 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.490   0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

86872 (2000 HE21)          Discovered 2000-Apr-27 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 2000 HE21 = 2001 QH178 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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