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JPL Small-Body Database Browser
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3933 Portugal (1986 EN4)
Classification: Outer Main-belt Asteroid          SPK-ID: 2003933
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09602555998919086 3.1128e-08  
a 3.250914757014537 1.7343e-08 au
q 2.938743846995092 1.0146e-07 au
i 1.69165148753923 4.045e-06 deg
node 42.72588349653751 0.00012688 deg
peri 250.4663330892116 0.0001287 deg
M 130.1549123300573 2.1984e-05 deg
tp 2457826.457400200991
(2017-Mar-13.95740020)
0.00013094 TDB
period 2140.951355112948
5.86
1.7133e-05
4.691e-08
d
yr
n .168149546761191 1.3456e-09 deg/d
Q 3.563085667033982 1.9009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2468  
   data-arc span      24189 days (66.23 yr)  
   first obs. used      1953-09-06  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50188  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:55:46  

Additional Information
 Earth MOID = 1.92252 au 
 Jupiter MOID = 1.59756 au 
 T_jup = 3.173 
[ 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 12.5   n/a MPO384788  
diameter diameter 14.949 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.56077 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.087   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3933 Portugal (1986 EN4)          Discovered 1986-Mar-12 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1986 EN4 = 1982 ON = 1983 YW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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