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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08862558020181203 4.7713e-08  
a 5.232028097570069 1.5947e-07 au
q 4.768336571790739 3.3147e-07 au
i 2.354044444670938 5.5999e-06 deg
node 156.6072435172337 0.00012404 deg
peri 278.3441193512447 0.00013071 deg
M 257.7142666740039 4.6819e-05 deg
tp 2459842.484256330292
(2022-Sep-19.98425633)
0.00060762 TDB
period 4371.228691824514
11.97
0.00019985
5.472e-07
d
yr
n .08235670686214752 3.7653e-09 deg/d
Q 5.695719623349399 1.736e-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 = 3.7843 au 
 Jupiter MOID = .018673 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 ]
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