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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2436298471946216 2.3136e-08  
a 2.653475203517946 7.3331e-09 au
q 2.007009445150151 6.0312e-08 au
i 3.683949746953494 1.0272e-06 deg
node 51.86206662611576 1.8137e-05 deg
peri 298.2266612855649 1.855e-05 deg
M 198.8412072990158 5.5475e-06 deg
tp 2459907.260845612147
(2022-Nov-23.76084561)
2.6322e-05 TDB
period 1578.777677321352
4.32
6.5447e-06
1.792e-08
d
yr
n .2280245060284849 9.4525e-10 deg/d
Q 3.29994096188574 9.1197e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2845  
   data-arc span      30815 days (84.37 yr)  
   first obs. used      1936-11-09  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45477  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:20:52  

Additional Information
 Earth MOID = 1.00264 au 
 Jupiter MOID = 2.14075 au 
 T_jup = 3.343 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.84   n/a MPCxxxxx  
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

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 ]
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