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52961 (1998 TH9)
Classification: Main-belt Asteroid          SPK-ID: 2052961
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1531518344164145 3.2627e-08  
a 2.366062442073933 6.5981e-09 au
q 2.003695638726529 7.6271e-08 au
i 1.618736058564402 3.6166e-06 deg
node 208.72484522649 0.00011039 deg
peri 169.0856000031944 0.0001109 deg
M 41.15606594586007 1.0634e-05 deg
tp 2459048.526073892217
(2020-Jul-18.02607389)
3.92e-05 TDB
period 1329.345070803716
3.64
5.5606e-06
1.522e-08
d
yr
n .2708100461698373 1.1328e-09 deg/d
Q 2.728429245421338 7.6086e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1071  
   data-arc span      9216 days (25.23 yr)  
   first obs. used      1995-11-20  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50256  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:49:17  

Additional Information
 Earth MOID = 1.0041 au 
 Jupiter MOID = 2.73447 au 
 T_jup = 3.531 
[ 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 15.91   n/a MPCxxxxx  
diameter diameter 1.800 km 0.327 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.217   0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52961 (1998 TH9)          Discovered 1998-Oct-12 by Spacewatch at Kitt Peak
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 TH9 = 1995 WE35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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