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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666808810848084 4.4516e-08  
a 2.342068583834979 7.9501e-09 au
q 1.951690528720315 1.0572e-07 au
i 3.70445234091811 4.269e-06 deg
node 27.53148752352907 5.259e-05 deg
peri 164.4485699122393 5.3694e-05 deg
M 180.2480589056174 1.316e-05 deg
tp 2459254.185614799249
(2021-Feb-08.68561480)
4.9318e-05 TDB
period 1309.175410818882
3.58
6.666e-06
1.825e-08
d
yr
n .274982249914717 1.4001e-09 deg/d
Q 2.732446638949642 9.2752e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1933  
   data-arc span      23826 days (65.23 yr)  
   first obs. used      1954-09-04  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53428  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:14:38  

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2015-Feb-03 09:08 < 00:01 Amphi 0.0015302543454591 0.00152901583450505 0.00153149286230426 4.07753084744876 4.07752992612513 2457056.880732780 0.252949105270875 62.1340657481936 45.9186333920608 -9.73649879076723 3724.30203454656 T 23 CATAB v2.0f-lin.ifort 2019-Dec-03 22:14:53 2019-Dec-03 22:14

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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