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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1025561126665617 5.9992e-08  
a 2.779007549303229 1.7815e-08 au
q 2.494003337975661 1.6474e-07 au
i 9.640591492024804 7.0701e-06 deg
node 30.28192641877082 2.8236e-05 deg
peri 208.8764285527335 4.0316e-05 deg
M 246.132224603182 2.9982e-05 deg
tp 2458135.718790148930
(2018-Jan-17.21879015)
0.00014198 JED
period 1692.127239529782
4.63
1.6272e-05
4.455e-08
d
yr
n .2127499585078714 2.0458e-09 deg/d
Q 3.064011760630796 1.9642e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1331  
   data-arc span      23437 days (64.17 yr)  
   first obs. used      1952-01-30  
   last obs. used      2016-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53158  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:58:39  

Additional Information
 Earth MOID = 1.48726 au 
 Jupiter MOID = 1.94109 au 
 T_jup = 3.306 
[ 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 MPO309207  
rotation period rot_per 30.3338 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

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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