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10304 Iwaki (1989 SY)
Classification: Main-belt Asteroid          SPK-ID: 2010304
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2819803032359357 4.1426e-08  
a 2.566830208091416 1.0204e-08 au
q 1.843034647658639 1.0501e-07 au
i 12.73192980412239 2.808e-06 deg
node 25.64146245084322 5.7763e-06 deg
peri 45.99140512539186 7.0499e-06 deg
M 187.0225798295925 4.5499e-06 deg
tp 2459922.240463710482
(2022-Dec-08.74046371)
2.2067e-05 TDB
period 1502.08372098397
4.11
8.9571e-06
2.452e-08
d
yr
n .2396670671353623 1.4292e-09 deg/d
Q 3.290625768524194 1.3082e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1675  
   data-arc span      11244 days (30.78 yr)  
   first obs. used      1989-09-30  
   last obs. used      2020-07-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:59:36  

Additional Information
 Earth MOID = .879105 au 
 Jupiter MOID = 2.16034 au 
 T_jup = 3.342 
[ 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 13.51   n/a E2021B10  
diameter diameter 5.620 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.268   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

10304 Iwaki           Discovered 1989 Sept. 30 by K. Endate and K. Watanabe at Kitami.
Masae Iwaki (b. 1933), an amateur astronomer in Oita, is the winner of the Vega Prize for distinguished women amateur astronomers. She has been very active in the popularization of astronomy through frequent star parties and lectures, as well as through writings in newspapers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1989 SY = 1991 HL4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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