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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 ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4855999205974553 1.091e-07  
a 1.45452354614424 7.338e-09 AU
q .748207027629468 1.5762e-07 AU
i 19.58359796870337 3.2685e-05 deg
node 359.3855452326811 3.577e-05 deg
peri 68.8683816157114 4.774e-05 deg
M 304.6823329629996 4.6509e-05 deg
tp 2456898.955711764285
(2014-Aug-29.45571176)
8.3414e-05 JED
period 640.7366422635811
1.75
4.8487e-06
1.328e-08
d
yr
n .5618533048589192 4.2518e-09 deg/d
Q 2.160840064659012 1.0901e-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 = .0391781 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 (413)
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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