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91011 (1998 CH2)
Classification: Main-belt Asteroid          SPK-ID: 2091011
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .178938288067787 6.0541e-08  
a 2.551320422167263 1.3971e-08 au
q 2.094791513512269 1.5398e-07 au
i 7.529914043722344 6.2577e-06 deg
node 348.0718067730552 4.0334e-05 deg
peri 142.0625705327948 4.3168e-05 deg
M 178.2650898703832 2.0428e-05 deg
tp 2458263.428300108811
(2018-May-24.92830011)
8.013e-05 TDB
period 1488.490046782359
4.08
1.2226e-05
3.347e-08
d
yr
n .2418558328812512 1.9866e-09 deg/d
Q 3.007849330822256 1.6471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      599  
   data-arc span      11062 days (30.29 yr)  
   first obs. used      1990-04-15  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58198  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:14:40  

Additional Information
 Earth MOID = 1.11481 au 
 Jupiter MOID = 2.04648 au 
 T_jup = 3.405 
[ 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 15.2   n/a MPO385377  
diameter diameter 1.909 km 0.349 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.485   0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91011 (1998 CH2)          Discovered 1998-Feb-08 by Galad, A., Pravda, A. at Modra
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Alternate Designations
 1998 CH2 = 1990 GG = 1994 CZ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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