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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08573929326132843 4.5462e-08  
a 3.034988010306283 2.416e-08 au
q 2.774770283246017 1.3318e-07 au
i 8.789432578297363 5.3691e-06 deg
node 313.5022501268779 2.9665e-05 deg
peri 94.74528075397005 4.6224e-05 deg
M 85.58344223682987 3.306e-05 deg
tp 2458541.385355393779
(2019-Feb-26.88535539)
0.00017809 TDB
period 1931.229543220134
5.29
2.306e-05
6.313e-08
d
yr
n .1864097415368531 2.2259e-09 deg/d
Q 3.295205737366548 2.6231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      8704 days (23.83 yr)  
   first obs. used      1996-07-22  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50587  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:39  

Additional Information
 Earth MOID = 1.80268 au 
 Jupiter MOID = 2.02549 au 
 T_jup = 3.218 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457253.5 (2015-Aug-19.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08422803456513651 4.5059e-08  
q 2.781004101188366 1.318e-07 au
tp 2456614.736541296293
(2013-Nov-18.23654130)
0.00018754 TDB
node 313.5597582611048 2.964e-05 deg
peri 95.59414497140884 4.6786e-05 deg
i 8.791594311715047 5.3702e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      8704 days (23.83 yr)  
   first obs. used      1996-07-22  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50587  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:39  

Additional Information
 Jupiter MOID = 2.02549 au 
 T_jup = 3.218 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.030356042810864E-15 -5.860409285727528E-15 -2.255717554075008E-12 7.910586617809069E-15 -4.919421257842826E-13 -7.439354318668068E-17
q -5.860409285727528E-15 1.737161018790741E-14 5.530172666103265E-12 -2.277468149499793E-14 1.261851694361957E-12 7.602039630008848E-16
tp -2.255717554075008E-12 5.530172666103265E-12 3.516986455042899E-8 -6.5452308529046E-11 6.801999380861397E-9 -1.727263961008955E-12
node 7.910586617809069E-15 -2.277468149499793E-14 -6.5452308529046E-11 8.785037106678794E-10 -8.80709016794136E-10 1.96923762694975E-11
peri -4.919421257842826E-13 1.261851694361957E-12 6.801999380861397E-9 -8.80709016794136E-10 2.188949368816762E-9 -1.971888992808606E-11
i -7.439354318668068E-17 7.602039630008848E-16 -1.727263961008955E-12 1.96923762694975E-11 -1.971888992808606E-11 2.883893777761522E-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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