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

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3570522712425096 6.1484e-08  
a 1.022636912005044 4.5532e-09 au
q .6575020799172163 6.0014e-08 au
i 4.917322668400003 2.4617e-06 deg
node 180.2183601608095 2.0386e-05 deg
peri 255.3412725591861 2.0577e-05 deg
M 127.2760464659512 1.2697e-05 deg
tp 2458866.955871164505
(2020-Jan-18.45587116)
1.2461e-05 TDB
period 377.7292563344943
1.03
2.5227e-06
6.907e-09
d
yr
n .9530635871138499 6.3652e-09 deg/d
Q 1.387771744092871 6.1789e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -3.801020413653063E-14 6.084E-15
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)      414  
   # delay obs. used      2  
   # Doppler obs. used      2  
   data-arc span      11374 days (31.14 yr)  
   first obs. used      1989-03-31  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45323  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-26 08:18:39  

Additional Information
 Earth MOID = .00354485 au 
 Jupiter MOID = 3.87441 au 
 T_jup = 5.913 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 20.7   n/a MPO267726  
rotation period rot_per 8.008 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46-4, submitted. (NEA Gaggle) http://www.planetarysciences.org/lightcurves.html]

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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