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 ]  
43810 (1991 RJ20)
Classification: Main-belt Asteroid          SPK-ID: 2043810
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2271404219224675 7.4921e-08  
a 2.409878396926288 2.0995e-08 AU
q 1.862497601066611 1.7505e-07 AU
i 3.053897010935789 6.396e-06 deg
node 131.7407922882003 0.00013699 deg
peri 229.1969563426968 0.00013754 deg
M 18.84310236266294 1.6532e-05 deg
tp 2456728.977773402410
(2014-Mar-12.47777340)
6.2074e-05 JED
period 1366.441739771656
3.74
1.7857e-05
4.889e-08
d
yr
n .2634579942355677 3.4429e-09 deg/d
Q 2.957259192785965 2.5764e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      518  
   data-arc span      7527 days (20.61 yr)  
   first obs. used      1991-09-14  
   last obs. used      2012-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54668  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 06:06:56  

Additional Information
 Earth MOID = .859701 AU 
 T_jup = 3.483 
[ 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 15.5 mag n/a MPO229321  

43810 (1991 RJ20)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar (675)
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RJ20 = 1995 XZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Jul-26 03:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin