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 ]  
7521 (1990 QS2)
Classification: Main-belt Asteroid          SPK-ID: 2007521
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .008794209850751867 6.4447e-08  
a 2.901819902983703 2.7965e-08 AU
q 2.876300689807775 1.8521e-07 AU
i 2.649083540495482 5.8593e-06 deg
node 143.267946288552 0.00014475 deg
peri 11.88841825171517 0.00038847 deg
M 125.9801496218306 0.0003586 deg
tp 2456168.664928785560
(2012-Aug-29.16492879)
0.0018002 JED
period 1805.527508262164
4.94
2.61e-05
7.146e-08
d
yr
n .1993877126505279 2.8822e-09 deg/d
Q 2.92733911615963 2.821e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1140  
   data-arc span      11403 days (31.22 yr)  
   first obs. used      1983-04-16  
   last obs. used      2014-07-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50012  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:17:11  

Additional Information
 Earth MOID = 1.8829 AU 
 T_jup = 3.285 
[ 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 12.9 mag n/a MPO267738  

7521 (1990 QS2)          Discovered 1990-Aug-24 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 QS2 = 1983 HQ1 = 1985 SB4 = 1986 WC7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Aug-01 01:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin