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21035 Iwabu (1990 AE)
Classification: Main-belt Asteroid          SPK-ID: 2021035
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2477963532094453 3.5217e-08  
a 2.340590456442416 8.3963e-09 au
q 1.760600676979154 8.0374e-08 au
i 4.7771362276402 3.8497e-06 deg
node 82.23013142965408 5.8713e-05 deg
peri 351.2100014013683 5.9517e-05 deg
M 308.8273972439154 1.16e-05 deg
tp 2459582.418059444509
(2022-Jan-02.91805944)
4.2767e-05 TDB
period 1307.936235314217
3.58
7.0378e-06
1.927e-08
d
yr
n .2752427758173655 1.481e-09 deg/d
Q 2.920580235905677 1.0477e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1441  
   data-arc span      11496 days (31.47 yr)  
   first obs. used      1990-01-01  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50627  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:03:38  

Additional Information
 Earth MOID = .775545 au 
 Jupiter MOID = 2.36886 au 
 T_jup = 3.518 
[ 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 14.54   n/a E2021B10  
diameter diameter 3.404 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.265   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21035 Iwabu           Discovered 1990 Jan. 1 by K. Endate and K. Watanabe at Kitami.
Shimeichi Iwabu (b. 1914) became enthralled with total eclipses after witnessing his first in Hokkaido in 1963. Since then, he has taken part in solar-eclipse expeditions to every corner of the world. He witnessed the annular solar eclipse of China in 2010 on what was his 22nd expedition.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20121029/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1990 AE = 1999 NV38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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