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120825 (1998 HE111)
Classification: Main-belt Asteroid          SPK-ID: 2120825
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1665497452179986 3.4265e-08  
a 2.570486546979118 1.4719e-08 au
q 2.142372667493452 8.8145e-08 au
i 5.635388292038278 6.4501e-06 deg
node 115.1708297599099 4.1349e-05 deg
peri 93.34671256731755 4.8054e-05 deg
M 131.7954256381815 2.6377e-05 deg
tp 2458449.414142342782
(2018-Nov-26.91414234)		 0.00010721 TDB
period 1505.294343835891
4.12		 1.293e-05
3.54e-08		 d
yr
n .2391558843452663 2.0542e-09 deg/d
Q 2.998600426464783 1.7171e-08 au
   Orbit Determination Parameters
   # obs. used (total)      546  
   data-arc span      9546 days (26.14 yr)  
   first obs. used      1994-06-10  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53161  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:11:00  

Additional Information
 Earth MOID = 1.14644 au 
 Jupiter MOID = 1.98408 au 
 T_jup = 3.404 
[ 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 15.9   n/a MPO436583  
diameter diameter 1.802 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.260   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120825 (1998 HE111)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HE111 = 2002 EB98 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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