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74447 (1999 CH21)
Classification: Main-belt Asteroid          SPK-ID: 2074447
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08588736732862165 4.5382e-08  
a 3.034415620702738 2.361e-08 au
q 2.773797651659734 1.3316e-07 au
i 8.789666194856034 5.2629e-06 deg
node 313.5028602002322 2.9518e-05 deg
peri 94.63502306817109 4.4915e-05 deg
M 122.9703383132845 3.1872e-05 deg
tp 2458541.008971331075
(2019-Feb-26.50897133)
0.00017152 TDB
period 1930.683232861895
5.29
2.2533e-05
6.169e-08
d
yr
n .1864624884457944 2.1762e-09 deg/d
Q 3.295033589745741 2.5638e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      8998 days (24.64 yr)  
   first obs. used      1996-07-22  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:13:33  

Additional Information
 Earth MOID = 1.80081 au 
 Jupiter MOID = 2.02637 au 
 T_jup = 3.219 
[ 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 14.11   n/a E2021B10  
diameter diameter 5.928 km 0.413 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.182   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74447 (1999 CH21)          Discovered 1999-Feb-10 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CH21 = 2002 SJ62 = 2002 TD125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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