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JPL Small-Body Database Browser
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442216 (2011 HD18)
Classification: Main-belt Asteroid          SPK-ID: 2442216
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1496784612930205 7.6332e-08  
a 2.247667597065344 3.2377e-08 au
q 1.911240169638423 1.6139e-07 au
i 3.212475413954121 9.719e-06 deg
node 172.6940479641403 0.00013035 deg
peri 81.04567477410878 0.00013737 deg
M 98.09898068157675 3.4154e-05 deg
tp 2458265.103483228631
(2018-May-26.60348323)
0.00011969 TDB
period 1230.825694607535
3.37
2.6595e-05
7.281e-08
d
yr
n .2924865816315207 6.3199e-09 deg/d
Q 2.584095024492266 3.7224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      80  
   data-arc span      5222 days (14.30 yr)  
   first obs. used      2004-03-17  
   last obs. used      2018-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53033  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:53:01  

Additional Information
 Earth MOID = .899673 au 
 Jupiter MOID = 2.45519 au 
 T_jup = 3.613 
[ 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 18.1   n/a MPO456095  

442216 (2011 HD18)          Discovered 2011-Apr-22 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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