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364888 (2008 EN57)
Classification: Main-belt Asteroid          SPK-ID: 2364888
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2000113359439935 5.8591e-08  
a 2.575609743409906 2.1591e-08 au
q 2.060458597760125 1.5732e-07 au
i 14.75460126668493 4.6243e-06 deg
node 159.9473986013279 2.0045e-05 deg
peri 222.3425354747254 2.161e-05 deg
M 233.7165842954961 1.0154e-05 deg
tp 2459926.117510142907
(2022-Dec-12.61751014)
4.6688e-05 TDB
period 1509.796853274745
4.13
1.8985e-05
5.198e-08
d
yr
n .238442674734128 2.9982e-09 deg/d
Q 3.090760889059688 2.5909e-08 au
  Orbit Determination Parameters
   # obs. used (total)      603  
   data-arc span      4914 days (13.45 yr)  
   first obs. used      2008-02-18  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .499  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 20:27:30  

Additional Information
 Earth MOID = 1.08302 au 
 Jupiter MOID = 2.42929 au 
 T_jup = 3.353 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457945.5 (2017-Jul-11.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1990927525300286 5.8587e-08  
q 2.063694901613887 1.5717e-07 au
tp 2458416.285409912948
(2018-Oct-24.78540991)
3.7215e-05 TDB
node 159.9592751299816 2.0046e-05 deg
peri 222.4136911524253 2.1631e-05 deg
i 14.75084861836158 4.6232e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      603  
   data-arc span      4914 days (13.45 yr)  
   first obs. used      2008-02-18  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .499  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 20:27:30  

Additional Information
 Jupiter MOID = 2.42929 au 
 T_jup = 3.353 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.432423801421558E-15 -9.157722988016547E-15 1.850921245244143E-13 4.710280626286401E-14 -1.441718783458319E-15 -9.727849348745769E-15
q -9.157722988016547E-15 2.470145422182053E-14 -2.726015364771159E-13 -1.289162680534524E-13 3.326520950655732E-14 2.734873559462504E-14
tp 1.850921245244143E-13 -2.726015364771159E-13 1.384919404201416E-9 1.553076310956156E-12 3.329305176361368E-10 6.314430199530006E-13
node 4.710280626286401E-14 -1.289162680534524E-13 1.553076310956156E-12 4.018600177600902E-10 -3.878477061364048E-10 4.195263158115119E-11
peri -1.441718783458319E-15 3.326520950655732E-14 3.329305176361368E-10 -3.878477061364048E-10 4.678848398712221E-10 -4.062794984314737E-11
i -9.727849348745769E-15 2.734873559462504E-14 6.314430199530006E-13 4.195263158115119E-11 -4.062794984314737E-11 2.137422927773089E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.77   n/a MPO638952  
rotation period rot_per 3.91917 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

364888 (2008 EN57)          Discovered 2008-Feb-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2013-06-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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