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5591 Koyo (1990 VF2)
Classification: Main-belt Asteroid          SPK-ID: 2005591
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08696623090426894 4.095e-08  
a 2.779247612249783 1.1253e-08 au
q 2.537546922662731 1.1223e-07 au
i 4.237959276918503 4.085e-06 deg
node 188.0702461212711 4.5971e-05 deg
peri 191.7721962451555 5.0119e-05 deg
M 148.6792349367871 2.0797e-05 deg
tp 2458301.564490215416
(2018-Jul-02.06449022)
9.6968e-05 TDB
period 1692.3465044021
4.63
1.0279e-05
2.814e-08
d
yr
n .2127223940626667 1.292e-09 deg/d
Q 3.020948301836836 1.2232e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2459  
   data-arc span      14077 days (38.54 yr)  
   first obs. used      1981-11-25  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:42:17  

Additional Information
 Earth MOID = 1.53977 au 
 Jupiter MOID = 2.41237 au 
 T_jup = 3.324 
[ 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 13.3   n/a MPO502207  
diameter diameter 17.075 km 0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.038   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

5591 Koyo (1990 VF2)          Discovered 1990-Nov-10 by Urata, T. at Oohira
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1990 VF2 = 1981 WG8 = 1985 PW1 = 1987 BG3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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