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7272 Darbydyar (1980 DD1)
Classification: Main-belt Asteroid          SPK-ID: 2007272
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019342883464602 7.8578e-08  
a 2.780237066899443 2.4296e-08 AU
q 2.496835580050599 2.2083e-07 AU
i 9.639126545128061 9.7902e-06 deg
node 30.29783115132848 3.6901e-05 deg
peri 209.1762457258116 5.7039e-05 deg
M 350.63196353038 4.6281e-05 deg
tp 2456444.562308072990
(2013-Jun-01.06230807)		 0.00021781 JED
period 1693.250336686586
4.64		 2.2196e-05
6.077e-08		 d
yr
n .2126088459574508 2.7869e-09 deg/d
Q 3.063638553748288 2.6773e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      1016  
   data-arc span      22357 days (61.21 yr)  
   first obs. used      1952-01-30  
   last obs. used      2013-04-16  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .55453  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:25:43  

Additional Information
 Earth MOID = 1.49059 AU 
 T_jup = 3.305 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.6 mag n/a PDS3 (MPC 28282)  

7272 Darbydyar           Discovered 1980 Feb. 21 by Z. Vavrova at Klet.
M. Darby Dyar (b. 1958) is a professor at Mount Holyoke College who specializes in Mössbauer spectroscopy of terrestrial and extraterrestrial material. Data from her laboratory have been vital for understanding Mössbauer measurements by the Mars Exploration Rovers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

[ show close-approach data ]
Alternate Designations
 1980 DD1 = 1971 KO = 1991 RG6 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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