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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2137420867939659 3.439e-08  
a 2.547640538518559 1.1131e-08 au
q 2.003102533414699 8.7998e-08 au
i 4.249783036891825 3.4218e-06 deg
node 235.6602959814211 6.4105e-05 deg
peri 16.71132196437732 6.5278e-05 deg
M 107.2981129315297 1.3856e-05 deg
tp 2458157.814561835106
(2018-Feb-08.31456184)
5.6852e-05 TDB
period 1485.27083454915
4.07
9.734e-06
2.665e-08
d
yr
n .2423800371124079 1.5885e-09 deg/d
Q 3.092178543622419 1.351e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      7763 days (21.25 yr)  
   first obs. used      1998-08-27  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54092  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:45:25  

Additional Information
 Earth MOID = .988976 au 
 Jupiter MOID = 1.95502 au 
 T_jup = 3.406 
[ 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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