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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08718000818789709 1.9845e-08  
a 2.778684890275948 1.089e-08 au
q 2.536439118790105 5.5218e-08 au
i 4.238512448137731 6.7687e-07 deg
node 188.0701747049696 1.0399e-05 deg
peri 191.732324036295 1.6871e-05 deg
M 191.2729993138087 1.6096e-05 deg
tp 2459993.438421399269
(2023-Feb-17.93842140)
7.769e-05 TDB
period 1691.832549282664
4.63
9.9453e-06
2.723e-08
d
yr
n .2127870161575031 1.2509e-09 deg/d
Q 3.020930661761791 1.1839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2526  
   data-arc span      14347 days (39.28 yr)  
   first obs. used      1981-11-25  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48555  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:43:26  

Additional Information
 Earth MOID = 1.53726 au 
 Jupiter MOID = 2.41263 au 
 T_jup = 3.325 
[ 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 13.31   n/a E2021B10  
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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