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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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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09617661695542208 3.1136e-08  
a 3.250704240190954 1.6809e-08 au
q 2.938062503646742 1.0132e-07 au
i 1.691350568758207 3.8322e-06 deg
node 42.70991178176234 0.00012513 deg
peri 250.6402553712352 0.00012677 deg
M 197.223555251466 2.1147e-05 deg
tp 2459968.451665456137
(2023-Jan-23.95166546)
0.00012668 TDB
period 2140.743398730285
5.86
1.6604e-05
4.546e-08
d
yr
n .1681658811670388 1.3043e-09 deg/d
Q 3.563345976735166 1.8425e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2638  
   data-arc span      24339 days (66.64 yr)  
   first obs. used      1953-09-06  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49167  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:01:17  

Additional Information
 Earth MOID = 1.92253 au 
 Jupiter MOID = 1.59895 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-August); 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

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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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