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91568 (1999 RD241)
Classification: Main-belt Asteroid          SPK-ID: 2091568
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2085842952613389 4.7464e-08  
a 3.149695146946968 2.036e-08 au
q 2.492718204432975 1.5203e-07 au
i 11.57890073580919 5.3366e-06 deg
node 54.30932390721191 2.3778e-05 deg
peri 351.5368054551425 2.6296e-05 deg
M 303.9773729247158 1.2254e-05 deg
tp 2459714.232893968012
(2022-May-14.73289397)
7.133e-05 TDB
period 2041.743627530594
5.59
1.9797e-05
5.42e-08
d
yr
n .1763198842135755 1.7096e-09 deg/d
Q 3.806672089460961 2.4606e-08 au
  Orbit Determination Parameters
   # obs. used (total)      751  
   data-arc span      9658 days (26.44 yr)  
   first obs. used      1995-02-25  
   last obs. used      2021-08-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53987  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:32  

Additional Information
 Earth MOID = 1.5027 au 
 Jupiter MOID = 1.60027 au 
 T_jup = 3.143 
[ 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 14.52   n/a MPO637244  
diameter diameter 8.436 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91568 (1999 RD241)          Discovered 1999-Sep-11 by LONEOS at Anderson Mesa
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RD241 = 2001 AK38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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