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16518 Akihikoito (1990 WF)
Classification: Main-belt Asteroid          SPK-ID: 2016518
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1438983286621231 1.2978e-08  
a 2.253491338335252 5.8263e-09 au
q 1.929217701094238 3.1575e-08 au
i 4.53010139295948 8.6162e-07 deg
node 130.7525499207316 7.5071e-06 deg
peri 255.6126120490649 8.9978e-06 deg
M 343.5257412750192 6.0963e-06 deg
tp 2459257.043885449620
(2021-Feb-11.54388545)
2.0964e-05 TDB
period 1235.612424308754
3.38
4.7919e-06
1.312e-08
d
yr
n .2913534963857269 1.1299e-09 deg/d
Q 2.577764975576266 6.6647e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2829  
   data-arc span      16217 days (44.40 yr)  
   first obs. used      1976-09-16  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44822  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:32:40  

Additional Information
 Earth MOID = .937849 au 
 Jupiter MOID = 2.87145 au 
 T_jup = 3.607 
[ 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 13.93   n/a E2021B10  
diameter diameter 4.858 km 0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.5845 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Clark, M. (2018) Minor Planet Bull. 45, 235-236.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.298   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16518 Akihikoito           Discovered 1990 Nov. 16 by T. Hioki and S. Hayakawa at Okutama.
Akihiko Ito (b. 1959) is one of the leading CCD astrophotographers in Japan. He has shared his knowledge and skill with others from around the world who are interested in this field and contributed to great improvements in CCD imaging.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1990 WF = 1956 TH = 1985 EH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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