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74727 (1999 RJ170)
Classification: Main-belt Asteroid          SPK-ID: 2074727
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808659573175755 4.8407e-08  
a 2.361043181050992 9.0715e-09 au
q 1.934010845842071 1.1694e-07 au
i 2.291048722256086 5.7032e-06 deg
node 342.0059369354603 0.00010366 deg
peri 27.32745724237152 0.00010455 deg
M 242.1097281013558 1.4651e-05 deg
tp 2459434.440105636337
(2021-Aug-07.94010564)
5.5413e-05 TDB
period 1325.117293506539
3.63
7.637e-06
2.091e-08
d
yr
n .2716740636954215 1.5657e-09 deg/d
Q 2.788075516259914 1.0712e-08 au
  Orbit Determination Parameters
   # obs. used (total)      594  
   data-arc span      14062 days (38.50 yr)  
   first obs. used      1981-10-24  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:07:52  

Additional Information
 Earth MOID = .933616 au 
 Jupiter MOID = 2.67814 au 
 T_jup = 3.528 
[ 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 16.4   n/a MPO351370  
diameter diameter 3.106 km 0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74727 (1999 RJ170)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RJ170 = 1981 UQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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