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9870 Maehata (1992 DA)
Classification: Main-belt Asteroid          SPK-ID: 2009870
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .166155595454081 2.5829e-08  
a 2.342034111065239 6.0609e-09 au
q 1.952892038767425 5.9639e-08 au
i 3.703916171794599 1.3483e-06 deg
node 27.51947323346613 4.5256e-06 deg
peri 164.4374383815505 6.5381e-06 deg
M 39.10025184749792 5.4818e-06 deg
tp 2459254.311227483447
(2021-Feb-08.81122748)
1.9895e-05 TDB
period 1309.146506411431
3.58
5.0819e-06
1.391e-08
d
yr
n .2749883211977661 1.0675e-09 deg/d
Q 2.731176183363053 7.068e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2527  
   data-arc span      24402 days (66.81 yr)  
   first obs. used      1954-09-04  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:07:06  

Additional Information
 Earth MOID = .9536 au 
 Jupiter MOID = 2.22163 au 
 T_jup = 3.542 
[ 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 13.96   n/a MPO614063  
diameter diameter 4.135 km 0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.358   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

9870 Maehata           Discovered 1992 Feb. 24 by T. Seki at Geisei.
Hideko Maehata (née Hideco Hyodo, 1914-1995), born in Hashimoto city, Wakayama Prefecture, won the gold medal for the 200-m breast-stroke event in the 1936 Olympuic Games in Berlin. She was the first Japanese female Olympic gold medalist.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050125/MPCPages.arcLast Updated: 2005-06-01

Alternate Designations
 1992 DA = 1974 DW = 1979 SM13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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