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 ]  
7937 (1990 QA2)
Classification: Main-belt Asteroid          SPK-ID: 2007937
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06261177893767973 5.0935e-08  
a 2.630966392205637 1.7527e-08 AU
q 2.466236906064393 1.327e-07 AU
i 1.587393543776155 5.341e-06 deg
node 319.8805204676663 0.00020927 deg
peri 113.0539523122295 0.00021492 deg
M 167.6779864626112 5.0473e-05 deg
tp 2456274.486114450319
(2012-Dec-12.98611445)
0.00021696 JED
period 1558.731735224912
4.27
1.5576e-05
4.264e-08
d
yr
n .2309569965533903 2.3079e-09 deg/d
Q 2.795695878346881 1.8624e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1230  
   data-arc span      13933 days (38.15 yr)  
   first obs. used      1976-05-03  
   last obs. used      2014-06-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5166  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:18:22  

Additional Information
 Earth MOID = 1.48108 AU 
 T_jup = 3.397 
[ 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 13.3 mag n/a MPO263419  

7937 (1990 QA2)          Discovered 1990-Aug-22 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 QA2 = 1976 JR6 = 1981 NE1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Aug-22 05:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin