Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4855395790918721 1.0906e-07  
a 1.454543356450526 7.085e-09 au
q .7483049873886586 1.5759e-07 au
i 19.58418406610504 3.2687e-05 deg
node 359.3811461980577 3.5766e-05 deg
peri 68.86146684458166 4.7744e-05 deg
M 281.8183670516745 4.8629e-05 deg
tp 2457539.652389963450
(2016-May-31.15238996)
8.7426e-05 JED
period 640.7497323566065
1.75
4.6816e-06
1.282e-08
d
yr
n .5618418265676989 4.1051e-09 deg/d
Q 2.160781725512392 1.0525e-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 = .039459 au 
 Jupiter MOID = 3.36938 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-13 15:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin