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JPL Small-Body Database Browser
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382123 (2011 HX81)
Classification: Main-belt Asteroid          SPK-ID: 2382123
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020624772545349 7.2317e-08  
a 2.574333822862263 2.6621e-08 au
q 2.311590935620803 1.9178e-07 au
i 9.728569888643692 5.4204e-06 deg
node 79.00211529309841 4.0048e-05 deg
peri 117.6853225078391 4.7272e-05 deg
M 357.6891101318059 2.5037e-05 deg
tp 2458610.184394416142
(2019-May-06.68439442)
0.00010497 TDB
period 1508.675094298457
4.13
2.3402e-05
6.407e-08
d
yr
n .238619966194512 3.7014e-09 deg/d
Q 2.837076710103722 2.9339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      6348 days (17.38 yr)  
   first obs. used      2002-01-13  
   last obs. used      2019-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55225  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:59:23  

Additional Information
 Earth MOID = 1.32681 au 
 Jupiter MOID = 2.17015 au 
 T_jup = 3.401 
[ 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 16.5   n/a MPO434367  
diameter diameter 3.377 km 0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

382123 (2011 HX81)          Discovered 2005-Oct-30 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2013-12-19

[ show close-approach data ]
Alternate Designations
 2011 HX81 = 2010 EU18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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