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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03700279238914354 3.7732e-08  
a 2.794649491168335 1.7827e-08 au
q 2.691239656246207 1.0325e-07 au
i 2.350139695386571 4.4502e-06 deg
node 295.3155829020842 0.00011713 deg
peri 312.0481276418291 0.00013829 deg
M 232.3982379285062 7.4917e-05 deg
tp 2459605.344333765086
(2022-Jan-25.84433377)
0.00035591 TDB
period 1706.433803268575
4.67
1.6328e-05
4.47e-08
d
yr
n .2109662849566393 2.0187e-09 deg/d
Q 2.898059326090462 1.8487e-08 au
  Orbit Determination Parameters
   # obs. used (total)      819  
   data-arc span      7928 days (21.71 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55904  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:00:32  

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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