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 ]  
71656 (2000 ET121)
Classification: Main-belt Asteroid          SPK-ID: 2071656
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05611737572749279 3.9816e-08  
a 2.983519727376324 1.9185e-08 au
q 2.81609242984476 1.2083e-07 au
i 11.07946388501563 4.9105e-06 deg
node 74.36329339812657 2.5377e-05 deg
peri 77.3408132594985 5.4924e-05 deg
M 334.7353423236333 4.8345e-05 deg
tp 2459132.599968767263
(2020-Oct-10.09996877)
0.00025301 TDB
period 1882.312808880833
5.15
1.8156e-05
4.971e-08
d
yr
n .1912540775908789 1.8447e-09 deg/d
Q 3.150947024907889 2.0261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1368  
   data-arc span      7775 days (21.29 yr)  
   first obs. used      1998-10-20  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50607  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:29:24  

Additional Information
 Earth MOID = 1.85397 au 
 Jupiter MOID = 1.93694 au 
 T_jup = 3.228 
[ 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 13.8   n/a MPO337801  
diameter diameter 5.923 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.152   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71656 (2000 ET121)          Discovered 2000-Mar-11 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 ET121 = 1998 WX11 
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-25 07:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin