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 ]  
109478 (2001 QJ221)
Classification: Main-belt Asteroid          SPK-ID: 2109478
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08138197167155597 5.9403e-08  
a 2.856818061780039 2.5298e-08 au
q 2.624324575205466 1.6178e-07 au
i 4.906641215920582 6.3454e-06 deg
node 231.3530365178735 7.2455e-05 deg
peri 86.25639033122037 8.7322e-05 deg
M 242.0492980234829 5.1951e-05 deg
tp 2459178.356935957877
(2020-Nov-24.85693596)
0.00025914 TDB
period 1763.69019818341
4.83
2.3427e-05
6.414e-08
d
yr
n .204117480706531 2.7112e-09 deg/d
Q 3.089311548354612 2.7356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      438  
   data-arc span      6949 days (19.03 yr)  
   first obs. used      2000-04-24  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61749  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:46:31  

Additional Information
 Earth MOID = 1.616 au 
 Jupiter MOID = 2.13023 au 
 T_jup = 3.293 
[ 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 15.4   n/a MPO432617  

109478 (2001 QJ221)          Discovered 2001-Aug-24 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2001 QJ221 = 2000 HV55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-13 21:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin