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3994 Ayashi (1988 XF)
Classification: Main-belt Asteroid          SPK-ID: 2003994
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .243119517907101 3.8698e-08  
a 2.654312751092487 7.7003e-09 au
q 2.008997514672211 1.0276e-07 au
i 3.683962698248932 4.033e-06 deg
node 51.88232826436852 5.4031e-05 deg
peri 298.2131499018033 5.4451e-05 deg
M 62.09387035183926 7.3336e-06 deg
tp 2458328.058792337302
(2018-Jul-28.55879234)
3.186e-05 TDB
period 1579.525228542402
4.32
6.8734e-06
1.882e-08
d
yr
n .2279165875256141 9.9179e-10 deg/d
Q 3.299627987512764 9.5724e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2328  
   data-arc span      30306 days (82.97 yr)  
   first obs. used      1936-11-09  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47283  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:31:33  

Additional Information
 Earth MOID = 1.00547 au 
 Jupiter MOID = 2.13672 au 
 T_jup = 3.343 
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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 12.8   n/a MPO381289  
diameter diameter 13.71 km 0.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
geometric albedo albedo 0.0782   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

3994 Ayashi (1988 XF)          Discovered 1988-Dec-02 by Koishikawa, M. at Sendai
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1988 XF = 1936 VE = 1936 XF = 1949 WD = 1966 RL = 1975 WR = 1977 DU3 = 1977 EV2 = 1979 SE4 = 1986 EM4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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