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4581 Asclepius (1989 FC)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004581
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3570076092871783 5.4865e-08  
a 1.02245803611192 5.2475e-09 AU
q .6574327370431401 5.7524e-08 AU
i 4.919256603287525 5.5294e-06 deg
node 180.2866084783589 7.3352e-05 deg
peri 255.2986035344092 7.2434e-05 deg
M 20.46623419144604 7.0638e-06 deg
tp 2456979.031480076325
(2014-Nov-17.53148008)
7.2576e-06 JED
period 377.6301541469361
1.03
2.9071e-06
7.959e-09
d
yr
n .9533137013733384 7.3389e-09 deg/d
Q 1.3874833351807 7.1209e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      180  
   # delay obs. used      2  
   # Doppler obs. used      2  
   data-arc span      9628 days (26.36 yr)  
   first obs. used      1989-03-31  
   last obs. used      2015-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52295  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Aug-11 06:17:40  

Additional Information
 Earth MOID = .00327135 AU 
 T_jup = 5.914 
[ 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 20.7 mag n/a MPO267726  

4581 Asclepius (1989 FC)          Discovered 1989-Mar-31 by Holt and Thomas at Palomar
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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