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 ]  
52632 (1997 WN21)
Classification: Main-belt Asteroid          SPK-ID: 2052632
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1851011893713858 7.5303e-08  
a 2.605881212472313 1.407e-08 au
q 2.123529500683139 1.9159e-07 au
i 16.72656568772506 5.4444e-06 deg
node 85.60236984799573 1.7929e-05 deg
peri 283.9036977816085 2.3632e-05 deg
M 78.80657379510951 1.9827e-05 deg
tp 2458264.150880794041
(2018-May-25.65088079)
8.3332e-05 TDB
period 1536.492161541723
4.21
1.2444e-05
3.407e-08
d
yr
n .2342999261634855 1.8975e-09 deg/d
Q 3.088232924261487 1.6674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1008  
   data-arc span      8027 days (21.98 yr)  
   first obs. used      1997-10-15  
   last obs. used      2019-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51095  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 06:58:01  

Additional Information
 Earth MOID = 1.19466 au 
 Jupiter MOID = 2.54223 au 
 T_jup = 3.329 
[ 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 13.9   n/a MPO493239  
diameter diameter 9.930 km 3.402 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.065   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

52632 (1997 WN21)          Discovered 1997-Nov-30 by Kobayashi, T. at Oizumi
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WN21 = 2000 KL56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-25 02:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin