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152561 (1991 RB)
Classification: Apollo [NEO, PHA]          SPK-ID: 2152561
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4855152040912705 1.093e-07  
a 1.454529175727242 9.6253e-09 au
q .7483331461173229 1.5756e-07 au
i 19.58344236292457 3.2689e-05 deg
node 359.3758778210225 3.576e-05 deg
peri 68.8702567206401 4.7716e-05 deg
M 34.18560124250157 4.9421e-05 deg
tp 2457539.655293001204
(2016-May-31.15529300)
8.7406e-05 JED
period 640.7403621245727
1.75
6.3601e-06
1.741e-08
d
yr
n .5618500429820102 5.577e-09 deg/d
Q 2.160725205337162 1.4298e-08 au
  Orbit Determination Parameters
   # obs. used (total)      71  
   data-arc span      13022 days (35.65 yr)  
   first obs. used      1977-08-19  
   last obs. used      2013-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .79541  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 08:58:19  

Additional Information
 Earth MOID = .0388431 au 
 Jupiter MOID = 3.36784 au 
 T_jup = 4.448 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 19.0 mag n/a MPO260148  

152561 (1991 RB)          Discovered 1991-Sep-04 by McNaught, R. H. at Siding Spring
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

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