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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2350106660261953 5.5021e-08  
a 2.268446953194592 1.0638e-08 AU
q 1.735337723879238 1.2171e-07 AU
i 2.072501782249661 5.7073e-06 deg
node 39.99325004241871 0.00011402 deg
peri 309.2922375007394 0.00011447 deg
M 41.16482880228474 1.0214e-05 deg
tp 2456857.802888693721
(2014-Jul-19.30288869)
3.5126e-05 JED
period 1247.933285888201
3.42
8.7784e-06
2.403e-08
d
yr
n .2884769595225393 2.0292e-09 deg/d
Q 2.801556182509946 1.3138e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1167  
   data-arc span      15117 days (41.39 yr)  
   first obs. used      1973-10-26  
   last obs. used      2015-03-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48493  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:55:40  

Additional Information
 Earth MOID = .730404 AU 
 T_jup = 3.577 
[ 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 14.7 mag n/a MPO319291  

16490 (1990 ST2)          Discovered 1990-Sep-18 by Holt, H. E. at Palomar
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 2015-Aug-03 15:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin