Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
523538 (2017 QA21)
Classification: Main-belt Asteroid          SPK-ID: 2523538
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07102023150205673 1.1105e-07  
a 2.799187857185268 9.6502e-08 au
q 2.600388887550225 3.5507e-07 au
i 4.087791504064667 1.0477e-05 deg
node 197.1309581908732 0.00014283 deg
peri 294.4562432829022 0.00015922 deg
M 324.2487565139732 7.8406e-05 deg
tp 2458770.377220388572
(2019-Oct-13.87722039)
0.00037734 TDB
period 1710.592230555234
4.68
8.8459e-05
2.422e-07
d
yr
n .2104534286836724 1.0883e-08 deg/d
Q 2.997986826820312 1.0336e-07 au
  Orbit Determination Parameters
   # obs. used (total)      48  
   data-arc span      2774 days (7.59 yr)  
   first obs. used      2011-03-13  
   last obs. used      2018-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67724  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-31 05:47:02  

Additional Information
 Earth MOID = 1.6184 au 
 Jupiter MOID = 2.03396 au 
 T_jup = 3.318 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   n/a MPO448264  

523538 (2017 QA21)          Discovered 2011-Mar-13 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2018-05-31
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-23 02:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin