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74201 (1998 RR55)
Classification: Main-belt Asteroid          SPK-ID: 2074201
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2135051613313584 3.4103e-08  
a 2.548312684676905 1.0901e-08 au
q 2.004234773812215 8.7025e-08 au
i 4.249055587575671 3.42e-06 deg
node 235.659628739694 5.9289e-05 deg
peri 16.77849538093285 6.0381e-05 deg
M 204.1432292021731 1.345e-05 deg
tp 2459643.780925520745
(2022-Mar-05.28092552)
5.669e-05 TDB
period 1485.858663707776
4.07
9.5341e-06
2.61e-08
d
yr
n .2422841477409868 1.5546e-09 deg/d
Q 3.092390595541595 1.3228e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1323  
   data-arc span      7824 days (21.42 yr)  
   first obs. used      1998-08-27  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53302  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:12:27  

Additional Information
 Earth MOID = .990344 au 
 Jupiter MOID = 1.95523 au 
 T_jup = 3.405 
[ 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 14.9   n/a MPO309716  
diameter diameter 2.183 km 0.296 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.488   0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74201 (1998 RR55)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 RR55 = 2001 FH38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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