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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4856226668232332 1.0907e-07  
a 1.454522604789532 7.1183e-09 AU
q .748173458496964 1.5761e-07 AU
i 19.58420793182992 3.2686e-05 deg
node 359.3844922105237 3.5769e-05 deg
peri 68.86895194023278 4.7743e-05 deg
M 57.05299157399796 4.7222e-05 deg
tp 2456898.955814543888
(2014-Aug-29.45581454)
8.3416e-05 JED
period 640.736020245094
1.75
4.7036e-06
1.288e-08
d
yr
n .5618538502990561 4.1245e-09 deg/d
Q 2.160871751082101 1.0575e-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 = .0381376 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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