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 ]  
66831 (1999 UJ44)
Classification: Main-belt Asteroid          SPK-ID: 2066831
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07428240077478426 6.482e-08  
a 2.75888765612963 2.0832e-08 au
q 2.553950857564404 1.7646e-07 au
i 4.991152367272957 5.9278e-06 deg
node 268.4341017248137 7.7953e-05 deg
peri 99.60092316187928 9.153e-05 deg
M 203.9659667957775 4.4644e-05 deg
tp 2459725.964698983232
(2022-May-26.46469898)
0.00020741 TDB
period 1673.784149975403
4.58
1.8958e-05
5.19e-08
d
yr
n .2150814966226621 2.4361e-09 deg/d
Q 2.963824454694857 2.238e-08 au
  Orbit Determination Parameters
   # obs. used (total)      545  
   data-arc span      7064 days (19.34 yr)  
   first obs. used      1999-10-22  
   last obs. used      2019-02-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64371  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:38:23  

Additional Information
 Earth MOID = 1.55879 au 
 Jupiter MOID = 2.41225 au 
 T_jup = 3.333 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO468596  

66831 (1999 UJ44)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-17 12:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin