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JPL Small-Body Database Browser
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13968 (1991 RE7)
Classification: Main-belt Asteroid          SPK-ID: 2013968
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534546574553556 3.9434e-08  
a 3.182983225615792 2.0256e-08 au
q 2.694539625042777 1.258e-07 au
i 17.54356316361648 6.4415e-06 deg
node 7.812540305626735 1.3323e-05 deg
peri 277.9579864973959 2.4331e-05 deg
M 84.29628465741366 1.9622e-05 deg
tp 2458514.813665049726
(2019-Jan-31.31366505)
0.00011334 TDB
period 2074.19676077884
5.68
1.98e-05
5.421e-08
d
yr
n .1735611619916057 1.6568e-09 deg/d
Q 3.671426826188806 2.3364e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1984  
   data-arc span      10355 days (28.35 yr)  
   first obs. used      1991-09-02  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44321  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:18:54  

Additional Information
 Earth MOID = 1.75019 au 
 Jupiter MOID = 1.81349 au 
 T_jup = 3.109 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457058.5 (2015-Feb-05.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555255827184408 3.9563e-08  
q 2.686266578834274 1.2693e-07 au
tp 2456445.930052898338
(2013-Jun-02.43005290)
0.00011601 TDB
node 7.875594603143305 1.3303e-05 deg
peri 278.6784862607139 2.4121e-05 deg
i 17.56856727676728 6.4489e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1984  
   data-arc span      10355 days (28.35 yr)  
   first obs. used      1991-09-02  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44321  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:18:54  

Additional Information
 Jupiter MOID = 1.81349 au 
 T_jup = 3.109 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.565256528945036E-15 -4.974695967987991E-15 2.141894416029489E-12 9.22046907073115E-16 3.666752897826839E-13 -1.325965380112668E-15
q -4.974695967987991E-15 1.611080461179253E-14 -7.418143000985587E-12 -4.664548560982763E-15 -1.253804748275304E-12 5.610602329285178E-15
tp 2.141894416029489E-12 -7.418143000985587E-12 1.345768689524618E-8 3.03839542730779E-12 2.348473127549343E-9 -7.364247683505652E-12
node 9.22046907073115E-16 -4.664548560982763E-15 3.03839542730779E-12 1.769765254963772E-10 -1.677902683412735E-10 -2.923138330077759E-11
peri 3.666752897826839E-13 -1.253804748275304E-12 2.348473127549343E-9 -1.677902683412735E-10 5.818208254112017E-10 2.66130730861626E-11
i -1.325965380112668E-15 5.610602329285178E-15 -7.364247683505652E-12 -2.923138330077759E-11 2.66130730861626E-11 4.158854377937409E-11

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 12.1   n/a MPO502275  
diameter diameter 18.386 km 0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.100   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13968 (1991 RE7)          Discovered 1991-Sep-02 by McNaught, R. H. at Siding Spring
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RE7 = 1995 FJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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