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118268 (1998 HG61)
Classification: Main-belt Asteroid          SPK-ID: 2118268
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2977802518943714 3.9509e-08  
a 3.02086763155818 1.6042e-08 au
q 2.121312907293232 1.209e-07 au
i 9.770845327130955 5.7934e-06 deg
node 24.01563632636375 2.1822e-05 deg
peri 221.5710059477913 2.3649e-05 deg
M 48.46970675859556 8.118e-06 deg
tp 2458742.295467239804
(2019-Sep-15.79546724)
4.2408e-05 TDB
period 1917.7675709207
5.25
1.5276e-05
4.182e-08
d
yr
n .1877182644334567 1.4953e-09 deg/d
Q 3.920422355823128 2.0819e-08 au
  Orbit Determination Parameters
   # obs. used (total)      694  
   data-arc span      8159 days (22.34 yr)  
   first obs. used      1998-03-29  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55841  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:02:45  

Additional Information
 Earth MOID = 1.12011 au 
 Jupiter MOID = 1.20902 au 
 T_jup = 3.156 
[ 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 15.0   n/a MPO475038  
diameter diameter 5.412 km 0.396 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118268 (1998 HG61)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HG61 = 2003 DJ14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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