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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1568376533275848 3.0337e-08  
a 2.671826074450192 1.1848e-08 au
q 2.252783142833971 7.9208e-08 au
i 13.31963246780557 4.7118e-06 deg
node 22.08932841380319 1.3599e-05 deg
peri 253.8439081143926 2.1585e-05 deg
M 127.8022726631525 1.75e-05 deg
tp 2458434.199717013893
(2018-Nov-11.69971701)
7.7512e-05 TDB
period 1595.18369765092
4.37
1.061e-05
2.905e-08
d
yr
n .2256793374519429 1.5011e-09 deg/d
Q 3.090869006066414 1.3706e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2196  
   data-arc span      16936 days (46.37 yr)  
   first obs. used      1974-03-21  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46363  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:45:41  

Additional Information
 Earth MOID = 1.28027 au 
 Jupiter MOID = 2.12671 au 
 T_jup = 3.325 
[ 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 13.0   n/a MPO358699  
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

[ hide close-approach data ]
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
2144-Jun-20 14:35 00:03 Hebe 0.040472627086034 0.0404649382200719 0.0404803282084062 8.55690147469141 8.55690145674078 2504311.107398077 3.0683716064703 1181.68578050908 43.4599862098919 -71.1670172138472 131846.535103829 T 29 CATAB v2.0f-lin.ifort 2020-Aug-24 23:45:57 2020-Aug-24 23:46

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