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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1662874850184557 2.9257e-08  
a 2.342363146865517 7.0603e-09 au
q 1.952857470173335 6.9229e-08 au
i 3.703789247660374 1.3697e-06 deg
node 27.51995736381723 4.5595e-06 deg
peri 164.4275035219663 7.986e-06 deg
M 345.2115517070552 9.0439e-06 deg
tp 2459254.289793014095
(2021-Feb-08.78979301)
3.3001e-05 TDB
period 1309.422401964414
3.59
5.9202e-06
1.621e-08
d
yr
n .2749303811053811 1.243e-09 deg/d
Q 2.731868823557699 8.2343e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2311  
   data-arc span      24307 days (66.55 yr)  
   first obs. used      1954-09-04  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54893  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:25:22  

Additional Information
 Earth MOID = .952143 au 
 Jupiter MOID = 2.22188 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 13.95   n/a MPCxxxxx  
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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