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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08573929281968776 4.5492e-08  
a 3.034988010500628 2.4178e-08 au
q 2.774770284764073 1.3332e-07 au
i 8.789432587267802 5.3691e-06 deg
node 313.5022488428832 2.9732e-05 deg
peri 94.74528210142385 4.6271e-05 deg
M 85.58344210164924 3.306e-05 deg
tp 2458541.385356074860
(2019-Feb-26.88535608)
0.00017809 TDB
period 1931.229543405633
5.29
2.3078e-05
6.318e-08
d
yr
n .186409741518948 2.2276e-09 deg/d
Q 3.295205736237183 2.6251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1127  
   data-arc span      8672 days (23.74 yr)  
   first obs. used      1996-07-22  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50567  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:05:10  

Additional Information
 Earth MOID = 1.80268 au 
 Jupiter MOID = 2.02549 au 
 T_jup = 3.218 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457243.5 (2015-Aug-09.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08418725432471783 4.5084e-08  
q 2.78125738891668 1.3192e-07 au
tp 2456614.803120808995
(2013-Nov-18.30312081)
0.00018765 TDB
node 313.5608396593005 2.9705e-05 deg
peri 95.61562583608912 4.6844e-05 deg
i 8.791779918079101 5.3703e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1127  
   data-arc span      8672 days (23.74 yr)  
   first obs. used      1996-07-22  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50567  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:05:10  

Additional Information
 Jupiter MOID = 2.02549 au 
 T_jup = 3.218 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.032544595187516E-15 -5.868833385476035E-15 -2.254150883366085E-12 7.926690003848108E-15 -4.91494405068905E-13 -7.399483636525639E-17
q -5.868833385476035E-15 1.740366463916636E-14 5.521926270044743E-12 -2.264047881955902E-14 1.259621936864548E-12 7.534249928273387E-16
tp -2.254150883366085E-12 5.521926270044743E-12 3.521224589583646E-8 -6.659155075047388E-11 6.81050021747549E-9 -1.730450808202593E-12
node 7.926690003848108E-15 -2.264047881955902E-14 -6.659155075047388E-11 8.823743711429255E-10 -8.847416650132816E-10 1.965873998585515E-11
peri -4.91494405068905E-13 1.259621936864548E-12 6.81050021747549E-9 -8.847416650132816E-10 2.194406843608461E-9 -1.968748537951143E-11
i -7.399483636525639E-17 7.534249928273387E-16 -1.730450808202593E-12 1.965873998585515E-11 -1.968748537951143E-11 2.88398306578566E-11

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 14.0   n/a MPO412634  
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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