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 ]  
21227 (1995 QS)
Classification: Main-belt Asteroid          SPK-ID: 2021227
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583681804518846 5.212e-08  
a 2.24999268184833 1.3185e-08 au
q 1.893665434793954 1.1583e-07 au
i 5.174682829022585 5.8835e-06 deg
node 59.05877639297029 6.8266e-05 deg
peri 214.1269143784886 7.1454e-05 deg
M 55.04165078230096 2.5588e-05 deg
tp 2457212.022707257830
(2015-Jul-08.52270726)
8.6925e-05 JED
period 1232.736017594142
3.38
1.0836e-05
2.967e-08
d
yr
n .2920333265694555 2.567e-09 deg/d
Q 2.606319928902706 1.5273e-08 au
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      7382 days (20.21 yr)  
   first obs. used      1995-08-16  
   last obs. used      2015-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53598  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 16:36:03  

Additional Information
 Earth MOID = .87866 au 
 Jupiter MOID = 2.4868 au 
 T_jup = 3.606 
[ 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 MPO290624  

21227 (1995 QS)          Discovered 1995-Aug-16 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-10 06:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin