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109776 (2001 RB81)
Classification: Main-belt Asteroid          SPK-ID: 2109776
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1226623090669451 3.35e-08  
a 2.765109318385799 1.3958e-08 au
q 2.42593462457007 9.5969e-08 au
i 7.991890608193913 3.9265e-06 deg
node 137.3465230543888 2.856e-05 deg
peri 295.2858237297841 3.3719e-05 deg
M 341.8790673705769 1.7788e-05 deg
tp 2459085.036629911889
(2020-Aug-23.53662991)
8.3176e-05 TDB
period 1679.449253007281
4.60
1.2716e-05
3.481e-08
d
yr
n .2143559856633783 1.6231e-09 deg/d
Q 3.104284012201528 1.567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      816  
   data-arc span      8062 days (22.07 yr)  
   first obs. used      1997-12-27  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59909  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:32:59  

Additional Information
 Earth MOID = 1.45387 au 
 Jupiter MOID = 2.15597 au 
 T_jup = 3.315 
[ 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 14.9   n/a MPO453559  
diameter diameter 3.298 km 1.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.235   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109776 (2001 RB81)          Discovered 2001-Sep-13 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 RB81 = 1997 YM8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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