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 ]  
91281 (1999 EQ11)
Classification: Main-belt Asteroid          SPK-ID: 2091281
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1317036839517041 7.4692e-08  
a 2.302860096364715 1.3828e-08 au
q 1.999564938048106 1.729e-07 au
i 24.34555967727336 6.2304e-06 deg
node 47.41373994167087 1.514e-05 deg
peri 140.2036804313073 2.6503e-05 deg
M .3132418979761491 2.2987e-05 deg
tp 2458999.389350297686
(2020-May-29.88935030)
8.1503e-05 TDB
period 1276.438099169519
3.49
1.1497e-05
3.148e-08
d
yr
n .2820348281943516 2.5403e-09 deg/d
Q 2.606155254681324 1.5649e-08 au
  Orbit Determination Parameters
   # obs. used (total)      811  
   data-arc span      7692 days (21.06 yr)  
   first obs. used      1999-01-13  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50754  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:26:52  

Additional Information
 Earth MOID = 1.02668 au 
 Jupiter MOID = 2.41751 au 
 T_jup = 3.461 
[ 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 15.0   n/a MPO459427  
diameter diameter 5.614 km 0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91281 (1999 EQ11)          Discovered 1999-Mar-12 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 EQ11 = 2001 TS122 
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-27 22:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin