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 ]  
16490 (1990 ST2)
Classification: Main-belt Asteroid          SPK-ID: 2016490
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2353038060314782 6.842e-08  
a 2.268465247728893 1.7398e-08 AU
q 1.734686741088145 1.5766e-07 AU
i 2.072839665356498 6.5963e-06 deg
node 39.99908321272976 0.00018634 deg
peri 309.3275889484133 0.00018667 deg
M 228.0740206311917 1.5618e-05 deg
tp 2456857.824479300314
(2014-Jul-19.32447930)		 5.7671e-05 JED
period 1247.94838238691
3.42		 1.4357e-05
3.931e-08		 d
yr
n .2884734698012426 3.3187e-09 deg/d
Q 2.802243754369642 2.1492e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      760  
   data-arc span      14422 days (39.49 yr)  
   first obs. used      1973-10-26  
   last obs. used      2013-04-21  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .53904  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 14:03:10  

Additional Information
 Earth MOID = .72902 AU 
 T_jup = 3.576 
[ 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 14.5 mag n/a PDS3 (MPO 2849)  

16490 (1990 ST2)          Discovered 1990-Sep-18 by Holt, H. E. at Palomar (675)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 ST2 = 1973 UM1 = 1990 SY28 = 1997 WN7 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2013-May-20 07:08 UT
(server date/time)   		NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster:   Alan B. Chamberlin