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74621 (1999 RG28)
Classification: Main-belt Asteroid          SPK-ID: 2074621
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1614923447821142 4.027e-08  
a 2.347432826992377 9.8056e-09 au
q 1.968340395542871 9.7745e-08 au
i 6.108278857868414 3.9155e-06 deg
node 124.8012510707474 3.8083e-05 deg
peri 212.7526746086293 3.9676e-05 deg
M 272.6293483452324 1.1963e-05 deg
tp 2459319.324187319541
(2021-Apr-14.82418732)
4.4336e-05 TDB
period 1313.675762526738
3.60
8.2312e-06
2.254e-08
d
yr
n .274040223827813 1.7171e-09 deg/d
Q 2.726525258441883 1.1389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      647  
   data-arc span      7563 days (20.71 yr)  
   first obs. used      1999-08-13  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:07:16  

Additional Information
 Earth MOID = .96176 au 
 Jupiter MOID = 2.64134 au 
 T_jup = 3.535 
[ 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 16.2   n/a MPO266274  
diameter diameter 1.349 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.203   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74621 (1999 RG28)          Discovered 1999-Sep-07 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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