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JPL Small-Body Database Browser
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4585 Ainonai (1990 KQ)
Classification: Main-belt Asteroid          SPK-ID: 2004585
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2362245140389558 3.7108e-08  
a 2.735608871420099 1.0921e-08 au
q 2.089390995168229 1.0196e-07 au
i 10.54931681628194 4.253e-06 deg
node 82.96642139236481 1.9046e-05 deg
peri 184.2305172689615 2.0368e-05 deg
M 220.8440559091569 8.3873e-06 deg
tp 2459639.320277902372
(2022-Feb-28.82027790)
4.0045e-05 TDB
period 1652.644459763231
4.52
9.8965e-06
2.71e-08
d
yr
n .2178326970893522 1.3044e-09 deg/d
Q 3.381826747671968 1.3501e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2161  
   data-arc span      17375 days (47.57 yr)  
   first obs. used      1972-06-09  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:37:50  

Additional Information
 Earth MOID = 1.07363 au 
 Jupiter MOID = 1.72139 au 
 T_jup = 3.287 
[ show covariance matrix ]

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 12.9   n/a MPO365302  
diameter diameter 10.920 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 38.31 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Brinsfield, J.W. (2008) Minor Planet Bull. 35, 179-181.]
geometric albedo albedo 0.112   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4585 Ainonai (1990 KQ)          Discovered 1990-May-16 by Endate and Watanabe at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1990 KQ = 1972 LU = 1978 WL12 = 1981 LC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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