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101908 (1999 RG4)
Classification: Main-belt Asteroid          SPK-ID: 2101908
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1753183843287527 8.2472e-08  
a 3.169572541089311 3.502e-08 au
q 2.613888204172754 2.736e-07 au
i 16.27244501150822 9.0936e-06 deg
node 307.6203980121985 2.0871e-05 deg
peri 54.09725998556188 2.9323e-05 deg
M 250.7502863770373 2.4654e-05 deg
tp 2459825.985544191174
(2022-Sep-03.48554419)
0.00014815 TDB
period 2061.1019328246
5.64
3.4159e-05
9.352e-08
d
yr
n .1746638505678584 2.8948e-09 deg/d
Q 3.725256878005868 4.116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      451  
   data-arc span      7624 days (20.87 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-05-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57707  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:19  

Additional Information
 Earth MOID = 1.64346 au 
 Jupiter MOID = 1.84382 au 
 T_jup = 3.117 
[ 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 14.50   n/a E2021B55  
diameter diameter 7.330 km 0.424 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101908 (1999 RG4)          Discovered 1999-Sep-05 by CSS at Catalina
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 RG4 = 2002 AU164 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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