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118266 (1998 HQ17)
Classification: Main-belt Asteroid          SPK-ID: 2118266
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1625813434756165 3.3646e-08  
a 3.02024751707851 1.9461e-08 au
q 2.529211618122991 1.0203e-07 au
i 5.274657195875039 4.1119e-06 deg
node 286.0905293254884 4.1594e-05 deg
peri 353.3145646836402 4.4404e-05 deg
M 47.60886174447391 1.3527e-05 deg
tp 2458946.959391482810
(2020-Apr-07.45939148)
7.2651e-05 TDB
period 1917.177091023036
5.25
1.853e-05
5.073e-08
d
yr
n .1877760806164746 1.8149e-09 deg/d
Q 3.511283416034029 2.2625e-08 au
  Orbit Determination Parameters
   # obs. used (total)      848  
   data-arc span      8306 days (22.74 yr)  
   first obs. used      1998-04-01  
   last obs. used      2020-12-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52047  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:19:18  

Additional Information
 Earth MOID = 1.51096 au 
 Jupiter MOID = 1.63555 au 
 T_jup = 3.220 
[ 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 14.94   n/a E2021B55  
diameter diameter 6.174 km 0.226 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118266 (1998 HQ17)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HQ17 = 1999 NG12 = 2002 AV35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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