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22952 Hommasachi (1999 TF243)
Classification: Main-belt Asteroid          SPK-ID: 2022952
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2754616494628336 4.9434e-08  
a 2.54834488950254 8.4711e-09 au
q 1.846373602839988 1.2876e-07 au
i 13.11759204813405 4.8761e-06 deg
node 174.1381560463267 1.1001e-05 deg
peri 147.4154323383569 1.3804e-05 deg
M 123.1603769043535 5.8128e-06 deg
tp 2458692.160049751647
(2019-Jul-27.66004975)
2.4752e-05 TDB
period 1485.886830563429
4.07
7.409e-06
2.028e-08
d
yr
n .2422795549399227 1.2081e-09 deg/d
Q 3.250316176165092 1.0805e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1899  
   data-arc span      14165 days (38.78 yr)  
   first obs. used      1982-05-22  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:15:03  

Additional Information
 Earth MOID = .846967 au 
 Jupiter MOID = 2.18608 au 
 T_jup = 3.352 
[ 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 14.5   n/a MPO347698  
diameter diameter 6.936 km 0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22952 Hommasachi           Discovered 1999 Oct. 5 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Sachiko Homma (b. 1965), of the Japan Aerospace Exploration Agency, is the secretary of Makoto Yoshikawa, project scientist for the Hayabusa mission.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1999 TF243 = 1982 KT1 = 1998 HO140 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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