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JPL Small-Body Database Browser
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91466 (1999 RU81)
Classification: Main-belt Asteroid          SPK-ID: 2091466
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2259578525840315 4.8169e-08  
a 2.786891672774555 1.4482e-08 au
q 2.157171615010097 1.3113e-07 au
i 7.965978592198367 5.2134e-06 deg
node 186.4805650136672 3.1122e-05 deg
peri 214.4529166934504 3.344e-05 deg
M 129.9240370543294 9.5254e-06 deg
tp 2458387.210450078970
(2018-Sep-25.71045008)
4.4818e-05 TDB
period 1699.333264092209
4.65
1.3245e-05
3.626e-08
d
yr
n .2118477920764492 1.6513e-09 deg/d
Q 3.416611730539013 1.7754e-08 au
  Orbit Determination Parameters
   # obs. used (total)      876  
   data-arc span      7984 days (21.86 yr)  
   first obs. used      1997-04-03  
   last obs. used      2019-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52098  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:24:55  

Additional Information
 Earth MOID = 1.17015 au 
 Jupiter MOID = 2.02677 au 
 T_jup = 3.279 
[ 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 15.0   n/a MPO459428  
diameter diameter 6.571 km 0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91466 (1999 RU81)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RU81 = 1997 GS10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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