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JPL Small-Body Database Browser
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39995 (1998 HC51)
Classification: Main-belt Asteroid          SPK-ID: 2039995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08845679407820911 4.4469e-08  
a 2.63129251944246 1.7e-08 au
q 2.398536818890606 1.1918e-07 au
i 13.55849079884296 5.8833e-06 deg
node 218.6503793247169 1.9976e-05 deg
peri 97.19862759303793 3.8116e-05 deg
M 332.6322715900798 3.2635e-05 deg
tp 2459119.019107958298
(2020-Sep-26.51910796)
0.00014154 TDB
period 1559.021568246833
4.27
1.5109e-05
4.137e-08
d
yr
n .2309140600311456 2.2378e-09 deg/d
Q 2.864048219994313 1.8504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      815  
   data-arc span      9093 days (24.90 yr)  
   first obs. used      1994-06-16  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54383  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:12:19  

Additional Information
 Earth MOID = 1.43236 au 
 Jupiter MOID = 2.37035 au 
 T_jup = 3.355 
[ 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 14.6   n/a MPO431950  
diameter diameter 8.325 km 0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39995 (1998 HC51)          Discovered 1998-Apr-25 by LONEOS at Anderson Mesa
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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