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 ]  
21043 (1990 RT2)
Classification: Main-belt Asteroid          SPK-ID: 2021043
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1712206503827448 9.3648e-08  
a 2.699438883199972 2.2546e-08 AU
q 2.237239201950003 2.5434e-07 AU
i 12.01085474545345 1.0141e-05 deg
node 356.4945105691987 3.3132e-05 deg
peri 15.80217241741929 4.0225e-05 deg
M 156.2315280699122 2.4613e-05 deg
tp 2456297.468384944426
(2013-Jan-04.96838494)
0.00010671 JED
period 1619.976355263903
4.44
2.0295e-05
5.556e-08
d
yr
n .2222254657175869 2.7841e-09 deg/d
Q 3.161638564449942 2.6407e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      815  
   data-arc span      12258 days (33.56 yr)  
   first obs. used      1981-09-03  
   last obs. used      2015-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48559  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:08:04  

Additional Information
 Earth MOID = 1.23899 AU 
 T_jup = 3.316 
[ 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 13.4 mag n/a MPO324503  

21043 (1990 RT2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RT2 = 1981 RT7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Apr-28 19:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin