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6981 Chirman (1993 TK2)
Classification: Main-belt Asteroid          SPK-ID: 2006981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1565191352837638 2.2213e-08  
a 2.672650453546809 1.1149e-08 au
q 2.254329515641903 5.8737e-08 au
i 13.31802256216737 8.3173e-07 deg
node 22.07301915211473 3.3327e-06 deg
peri 253.9386047898511 6.0867e-06 deg
M 217.0483808051889 5.7137e-06 deg
tp 2460030.221219077804
(2023-Mar-26.72121908)
2.8418e-05 TDB
period 1595.922033993235
4.37
9.9861e-06
2.734e-08
d
yr
n .2255749293085617 1.4115e-09 deg/d
Q 3.090971391451715 1.2894e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2589  
   data-arc span      17237 days (47.19 yr)  
   first obs. used      1974-03-21  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44727  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 00:52:23  

Additional Information
 Earth MOID = 1.28177 au 
 Jupiter MOID = 2.12457 au 
 T_jup = 3.325 
[ 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 13.08   n/a MPCxxxxx  
diameter diameter 6.992 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.201   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

6981 Chirman           Discovered 1993 Oct. 15 at Bassano Bresciano.
Named for the Surgical Department of the hospital in the Italian village of Manerbio, located a few kilometers from the Bassano Observatory. The name, a contraction of Chirurgia (Surgery) and the name of the village, is presented in honor of the doctors, nurses and all the personnel of the hospital for the competence, absorption and passion they devote to the care of patients.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19960828/MPCPages.arcLast Updated: 2003-09-26

Alternate Designations
 1993 TK2 = 1974 FN1 = 1984 SG3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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