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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 ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1174954003471226 3.672e-08  
a 2.176600232319 4.7492e-09 au
q 1.920859716627039 7.9325e-08 au
i 4.423104076179549 4.0795e-06 deg
node 24.65668410446812 3.3959e-05 deg
peri 304.0627007774723 3.6977e-05 deg
M 225.5707857276417 1.5726e-05 deg
tp 2459834.483341995012
(2022-Sep-11.98334200)
5.1665e-05 TDB
period 1172.914711818156
3.21
3.8388e-06
1.051e-08
d
yr
n .3069276873865428 1.0045e-09 deg/d
Q 2.432340748010961 5.3072e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2923  
   data-arc span      24539 days (67.18 yr)  
   first obs. used      1954-04-08  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44238  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:57:05  

Additional Information
 Earth MOID = .9134 au 
 Jupiter MOID = 2.85758 au 
 T_jup = 3.671 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.53   n/a MPO614063  
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. 2020-October); 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

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 ]
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