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 ]  
39691 (1996 RR31)
Classification: Jupiter Trojan          SPK-ID: 2039691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .08907699695319202 4.7776e-08  
a 5.233302545736968 1.5883e-07 au
q 4.767135670815223 3.3188e-07 au
i 2.353888003753049 5.5995e-06 deg
node 156.6071082324916 0.00012405 deg
peri 278.2093060652841 0.00013064 deg
M 290.8392930959217 4.7607e-05 deg
tp 2459840.577037272973
(2022-Sep-18.07703727)
0.00060498 TDB
period 4372.825943461203
11.97
0.00019907
5.45e-07
d
yr
n .08232662462550497 3.7479e-09 deg/d
Q 5.699469420658711 1.7298e-07 au
  Orbit Determination Parameters
   # obs. used (total)      514  
   data-arc span      8410 days (23.03 yr)  
   first obs. used      1996-09-13  
   last obs. used      2019-09-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53156  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:48:49  

Additional Information
 Earth MOID = 3.78325 au 
 Jupiter MOID = .0186665 au 
 T_jup = 2.990 
[ 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 12.6   n/a MPO452719  
diameter diameter 11.982 km 0.956 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.112   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

39691 (1996 RR31)          Discovered 1996-Sep-13 by Uppsala-DLR Trojan Survey at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-30 14:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin