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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2361713094008718 1.2819e-08  
a 2.735391240812649 1.0215e-08 au
q 2.08937030974625 3.8307e-08 au
i 10.54849362339245 4.3038e-07 deg
node 82.96178523171916 1.2961e-06 deg
peri 184.2666646283364 4.1925e-06 deg
M 264.3649896706566 6.772e-06 deg
tp 2459639.477249553538
(2022-Feb-28.97724955)
3.2485e-05 TDB
period 1652.447250175967
4.52
9.2567e-06
2.534e-08
d
yr
n .2178586941045556 1.2204e-09 deg/d
Q 3.381412171879048 1.2628e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2531  
   data-arc span      17820 days (48.79 yr)  
   first obs. used      1972-06-09  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46689  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:43:47  

Additional Information
 Earth MOID = 1.07185 au 
 Jupiter MOID = 1.72102 au 
 T_jup = 3.288 
[ 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 12.96   n/a MPCxxxxx  
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. 2020-October); 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

[ show close-approach data ]
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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