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5645 (1990 SP)
Classification: Apollo [NEO]          SPK-ID: 2005645
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 100 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3873931460191973 6.7151e-08  
a 1.354996058261649 2.6058e-09 AU
q .8300798724080573 9.0341e-08 AU
i 13.5081863628036 1.0418e-05 deg
node 45.77959763476093 2.7332e-05 deg
peri 48.16648127158814 3.0955e-05 deg
M 309.4918395910036 6.9482e-06 deg
tp 2456881.328501043528
(2014-Aug-11.82850104)
1.1041e-05 JED
period 576.1100808274012
1.58
1.6619e-06
4.55e-09
d
yr
n .6248805774809096 1.8026e-09 deg/d
Q 1.879912244115241 3.6153e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      511  
   data-arc span      14175 days (38.81 yr)  
   first obs. used      1974-08-13  
   last obs. used      2013-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52467  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-26 18:49:53  

Additional Information
 Earth MOID = .0545984 AU 
 T_jup = 4.755 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.1 mag n/a MPO267730  
rotation period rot_per 30.39 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; et al. (2005) Icarus 173, 108-131.]

5645 (1990 SP)          Discovered 1990-Sep-20 by McNaught, R. H. at Siding Spring (413)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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