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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1799917783887201 5.8677e-08  
a 2.548612067100734 1.3256e-08 au
q 2.089882848720321 1.4987e-07 au
i 7.536450421606057 6.1018e-06 deg
node 348.0536216692239 3.396e-05 deg
peri 142.2853070935768 3.6999e-05 deg
M 273.9224403342204 2.0369e-05 deg
tp 2459751.837853666816
(2022-Jun-21.33785367)
8.6287e-05 TDB
period 1486.120515227725
4.07
1.1595e-05
3.175e-08
d
yr
n .242241457749364 1.8899e-09 deg/d
Q 3.007341285481147 1.5642e-08 au
  Orbit Determination Parameters
   # obs. used (total)      669  
   data-arc span      11409 days (31.24 yr)  
   first obs. used      1990-04-15  
   last obs. used      2021-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56383  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 22:04:37  

Additional Information
 Earth MOID = 1.11044 au 
 Jupiter MOID = 2.04562 au 
 T_jup = 3.407 
[ 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 15.23   n/a MPO637237  
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

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