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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456646.5 (2013-Dec-20.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3570631152827726 1.3699e-07  
a 1.022394755408817 1.0442e-08 au
q .6573352989937767 1.3537e-07 au
i 4.919071479837801 5.6615e-06 deg
node 180.3003542311523 7.3568e-05 deg
peri 255.3007795364342 7.2447e-05 deg
M 42.95258968733214 5.0218e-06 deg
tp 2456601.448090922595
(2013-Nov-04.94809092)
5.2242e-06 JED
period 377.5950969645288
1.03
5.7849e-06
1.584e-08
d
yr
n .9534022101823486 1.4606e-08 deg/d
Q 1.387454211823858 1.4171e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.131602366468109E-14 1.177E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  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      .48878  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-05 09:50:41  

Additional Information
 Earth MOID = .00335152 au 
 Jupiter MOID = 3.88524 au 
 T_jup = 5.914 
 Nongravitational accels. using nonstandard g(r) = (1 AU/ r)^2 
[ 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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