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49538 (1999 CH61)
Classification: Main-belt Asteroid          SPK-ID: 2049538
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1068615519208333 6.0344e-08  
a 3.140254507304067 2.5913e-08 au
q 2.804682037227163 1.9695e-07 au
i 5.192249759065256 6.2945e-06 deg
node 182.8828119425879 5.2304e-05 deg
peri 350.0878680525573 5.7314e-05 deg
M 272.0795646916207 2.3448e-05 deg
tp 2459496.901433806781
(2021-Oct-09.40143381)		 0.0001343 TDB
period 2032.570875515328
5.56		 2.5159e-05
6.888e-08		 d
yr
n .1771155950016884 2.1923e-09 deg/d
Q 3.475826977380972 2.8682e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1008  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1999-01-14  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53164  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:28:14  

Additional Information
 Earth MOID = 1.80995 au 
 Jupiter MOID = 1.49134 au 
 T_jup = 3.195 
[ 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 14.2   n/a MPO359073  
diameter diameter 7.574 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49538 (1999 CH61)          Discovered 1999-Feb-12 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CH61 = 2000 JQ55 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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