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91117 (1998 HT79)
Classification: Main-belt Asteroid          SPK-ID: 2091117
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 .03700279264071861 3.7709e-08  
a 2.79464949143502 1.7797e-08 au
q 2.69123965579996 1.0322e-07 au
i 2.350139655474339 4.4464e-06 deg
node 295.3155810404217 0.00011682 deg
peri 312.0481285763334 0.00013796 deg
M 232.3982387718519 7.4805e-05 deg
tp 2459605.344329854126
(2022-Jan-25.84432985)
0.00035539 TDB
period 1706.433803512835
4.67
1.63e-05
4.463e-08
d
yr
n .2109662849264415 2.0152e-09 deg/d
Q 2.898059327070079 1.8455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      829  
   data-arc span      7956 days (21.78 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55587  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:23:42  

Additional Information
 Earth MOID = 1.67791 au 
 Jupiter MOID = 2.10255 au 
 T_jup = 3.325 
[ 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 15.1   n/a MPO280377  
diameter diameter 3.751 km 1.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.115   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91117 (1998 HT79)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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