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JPL Small-Body Database Browser
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13959 (1991 EL4)
Classification: Main-belt Asteroid          SPK-ID: 2013959
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683546878221166 3.1553e-08  
a 2.671869010268579 1.1099e-08 au
q 2.222047337143225 8.3887e-08 au
i 12.83492843509203 4.7607e-06 deg
node 181.4041480616561 1.6024e-05 deg
peri 85.75929655730772 2.1494e-05 deg
M 83.50588205648624 1.5008e-05 deg
tp 2458230.471020401274
(2018-Apr-21.97102040)
6.5791e-05 TDB
period 1595.222149326357
4.37
9.9401e-06
2.721e-08
d
yr
n .2256738976148392 1.4062e-09 deg/d
Q 3.121690683393933 1.2968e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1884  
   data-arc span      10408 days (28.50 yr)  
   first obs. used      1991-03-12  
   last obs. used      2019-09-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49747  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:16:27  

Additional Information
 Earth MOID = 1.25134 au 
 Jupiter MOID = 2.08209 au 
 T_jup = 3.325 
[ show covariance matrix ]

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 13.1   n/a MPO445371  
diameter diameter 6.489 km 0.266 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.124 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.290   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13959 (1991 EL4)          Discovered 1991-Mar-12 by Debehogne, H. at La Silla
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 EL4 = 1992 PA3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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