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4087 Part (1986 EM1)
Classification: Main-belt Asteroid          SPK-ID: 2004087
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 .1173690291097665 3.7554e-08  
a 2.176695799839984 4.9487e-09 au
q 1.921219127145458 8.1411e-08 au
i 4.422816799693953 4.8576e-06 deg
node 24.66834220062125 3.4626e-05 deg
peri 303.947734809061 3.8762e-05 deg
M 104.1648094403798 1.7579e-05 deg
tp 2458661.098655286801
(2019-Jun-26.59865529)
5.7179e-05 TDB
period 1172.991961039258
3.21
4.0002e-06
1.095e-08
d
yr
n .306907474183407 1.0466e-09 deg/d
Q 2.432172472534509 5.5296e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2409  
   data-arc span      24273 days (66.46 yr)  
   first obs. used      1954-04-08  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46679  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:50:38  

Additional Information
 Earth MOID = .914482 au 
 Jupiter MOID = 2.8589 au 
 T_jup = 3.671 
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Orbital Elements at Epoch 2457040.5 (2015-Jan-18.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1177631232917493 3.7649e-08  
q 1.920102374889622 8.1648e-08 au
tp 2457488.785366783422
(2016-Apr-10.28536678)
5.679e-05 TDB
node 24.69325036545214 3.4599e-05 deg
peri 304.0825678395279 3.8706e-05 deg
i 4.425347610743414 4.8596e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2409  
   data-arc span      24273 days (66.46 yr)  
   first obs. used      1954-04-08  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46679  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:50:38  

Additional Information
 Jupiter MOID = 2.8589 au 
 T_jup = 3.671 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.417450481154865E-15 -3.069577606435339E-15 1.324510950043545E-12 2.369061535549128E-15 3.890226198912086E-13 -1.556656994770174E-15
q -3.069577606435339E-15 6.666347715031183E-15 -2.88475972269437E-12 -5.506010610624849E-15 -8.498313729325822E-13 3.395694333274939E-15
tp 1.324510950043545E-12 -2.88475972269437E-12 3.225159638299875E-9 5.20621552387301E-12 9.887622257025202E-10 -2.695371481814229E-12
node 2.369061535549128E-15 -5.506010610624849E-15 5.20621552387301E-12 1.197094194889362E-9 -1.191309128394027E-9 -3.928761205930674E-11
peri 3.890226198912086E-13 -8.498313729325822E-13 9.887622257025202E-10 -1.191309128394027E-9 1.498162885498982E-9 3.834381902136995E-11
i -1.556656994770174E-15 3.395694333274939E-15 -2.695371481814229E-12 -3.928761205930674E-11 3.834381902136995E-11 2.361553451560001E-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 13.5   n/a MPO502192  
diameter diameter 6.405 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.47 h n/a LCDB (Rev. 2019-August); 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:
[Pray, D. (2005) Minor Planet Bull. 32, 48-51.]
geometric albedo albedo 0.206   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4087 Part (1986 EM1)          Discovered 1986-Mar-05 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1986 EM1 = 1951 KV = 1970 GT = 1974 TT = 1974 UP = 1983 JT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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