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 ]  
85191 (1991 RP4)
Classification: Main-belt Asteroid          SPK-ID: 2085191
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2613057156268583 6.7497e-08  
a 2.756426627132254 2.0008e-08 au
q 2.036156594756533 1.8412e-07 au
i 8.221694253627536 1.0619e-05 deg
node 228.4565931303412 4.3073e-05 deg
peri 118.1392253429934 4.8154e-05 deg
M 119.5611470420684 1.8109e-05 deg
tp 2456845.355995493004
(2014-Jul-06.85599549)
8.2031e-05 JED
period 1671.545034209142
4.58
1.82e-05
4.983e-08
d
yr
n .2153696087346679 2.3449e-09 deg/d
Q 3.476696659507974 2.5236e-08 au
  Orbit Determination Parameters
   # obs. used (total)      502  
   data-arc span      8867 days (24.28 yr)  
   first obs. used      1991-09-07  
   last obs. used      2015-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48666  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 16:15:22  

Additional Information
 Earth MOID = 1.04346 au 
 Jupiter MOID = 2.04787 au 
 T_jup = 3.278 
[ 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 15.0 mag n/a MPO325050  

85191 (1991 RP4)          Discovered 1991-Sep-07 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1991 RP4 = 2000 OU38 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-14 19:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin