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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534546575862245 3.9424e-08  
a 3.18298322560262 2.0252e-08 au
q 2.694539624615074 1.2576e-07 au
i 17.54356316830862 6.4413e-06 deg
node 7.812540268103413 1.3317e-05 deg
peri 277.9579865565725 2.4327e-05 deg
M 84.29628464963534 1.9622e-05 deg
tp 2458514.813665097557
(2019-Jan-31.31366510)
0.00011334 TDB
period 2074.196760765965
5.68
1.9796e-05
5.42e-08
d
yr
n .173561161992683 1.6565e-09 deg/d
Q 3.671426826590167 2.336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1988  
   data-arc span      10371 days (28.39 yr)  
   first obs. used      1991-09-02  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44282  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:30  

Additional Information
 Earth MOID = 1.75019 au 
 Jupiter MOID = 1.81349 au 
 T_jup = 3.109 
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Orbital Elements at Epoch 2457061.5 (2015-Feb-08.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555255817218949 3.9553e-08  
q 2.686259051499792 1.2689e-07 au
tp 2456445.925205506579
(2013-Jun-02.42520551)
0.00011601 TDB
node 7.875639552843852 1.3298e-05 deg
peri 278.6773197620493 2.4117e-05 deg
i 17.56858272873763 6.4487e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1988  
   data-arc span      10371 days (28.39 yr)  
   first obs. used      1991-09-02  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44282  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:30  

Additional Information
 Jupiter MOID = 1.81349 au 
 T_jup = 3.109 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.564432328242299E-15 -4.971728679685311E-15 2.141358262529452E-12 9.421961209328116E-16 3.665242782567838E-13 -1.328389486457225E-15
q -4.971728679685311E-15 1.610014154424701E-14 -7.416165618858689E-12 -4.728823673524655E-15 -1.253259131351469E-12 5.61809107948571E-15
tp 2.141358262529452E-12 -7.416165618858689E-12 1.345754053952788E-8 3.128665641295711E-12 2.34835480709691E-9 -7.376068044239283E-12
node 9.421961209328116E-16 -4.728823673524655E-15 3.128665641295711E-12 1.768242693802685E-10 -1.676291582413748E-10 -2.921212822239327E-11
peri 3.665242782567838E-13 -1.253259131351469E-12 2.34835480709691E-9 -1.676291582413748E-10 5.816433801256021E-10 2.659255684823032E-11
i -1.328389486457225E-15 5.61809107948571E-15 -7.376068044239283E-12 -2.921212822239327E-11 2.659255684823032E-11 4.158617997226921E-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

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