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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3872768580360235 6.0023e-08  
a 1.354946091002453 2.4522e-09 au
q .8302068260708312 8.1136e-08 au
i 13.50704341466437 8.571e-06 deg
node 45.76358644904288 2.4204e-05 deg
peri 48.19598392540836 2.7884e-05 deg
M 89.41674472648181 7.6256e-06 deg
tp 2457457.413781681798
(2016-Mar-09.91378168)
1.2218e-05 JED
period 576.0782138974159
1.58
1.5639e-06
4.282e-09
d
yr
n .6249151440122094 1.6964e-09 deg/d
Q 1.879685355934075 3.4018e-09 au
  Orbit Determination Parameters
   # obs. used (total)      530  
   data-arc span      14935 days (40.89 yr)  
   first obs. used      1974-08-13  
   last obs. used      2015-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4889  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:16:32  

Additional Information
 Earth MOID = .0545627 au 
 Jupiter MOID = 3.38314 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 LCDB (Rev. 2016-February); 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:
[Pravec, P.; et al. (2005) Icarus 173, 108-131.]

5645 (1990 SP)          Discovered 1990-Sep-20 by McNaught, R. H. at Siding Spring
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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