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91120 (1998 HR99)
Classification: Main-belt Asteroid          SPK-ID: 2091120
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06496464682085701 4.7658e-08  
a 2.720581521599021 1.3306e-08 au
q 2.543839903900991 1.3034e-07 au
i 4.893567149114398 5.1699e-06 deg
node 162.5662907062464 4.7678e-05 deg
peri 30.5820766393078 5.6557e-05 deg
M 83.00068905107528 2.9754e-05 deg
tp 2459018.605788226826
(2020-Jun-18.10578823)
0.00013541 TDB
period 1639.04562472521
4.49
1.2025e-05
3.292e-08
d
yr
n .2196400115831765 1.6114e-09 deg/d
Q 2.897323139297052 1.4171e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1010  
   data-arc span      9434 days (25.83 yr)  
   first obs. used      1995-10-01  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:32:13  

Additional Information
 Earth MOID = 1.54567 au 
 Jupiter MOID = 2.05672 au 
 T_jup = 3.350 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.15   n/a E2020-QM9  
diameter diameter 5.534 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91120 (1998 HR99)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 HR99 = 2000 VS16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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