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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666809166960913 4.5361e-08  
a 2.342068589212726 8.0574e-09 au
q 1.951690449797628 1.0747e-07 au
i 3.704452239811075 4.3817e-06 deg
node 27.53148912562184 5.5322e-05 deg
peri 164.448558400079 5.6417e-05 deg
M 180.2480658463928 1.3269e-05 deg
tp 2459254.185591809880
(2021-Feb-08.68559181)
4.9638e-05 TDB
period 1309.175415327982
3.58
6.7559e-06
1.85e-08
d
yr
n .274982248967615 1.419e-09 deg/d
Q 2.732446728627825 9.4004e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1880  
   data-arc span      23798 days (65.16 yr)  
   first obs. used      1954-09-04  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53543  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:20:04  

Additional Information
 Earth MOID = .951997 au 
 Jupiter MOID = 2.22361 au 
 T_jup = 3.542 
[ 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 13.9   n/a MPO452309  
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

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