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74504 (1999 DF7)
Classification: Main-belt Asteroid          SPK-ID: 2074504
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1858496426552427 3.1708e-08  
a 2.68707533420232 1.259e-08 au
q 2.187683343553102 8.4897e-08 au
i 11.40846384761186 5.7116e-06 deg
node 42.36514619608815 2.2498e-05 deg
peri 72.56986832456829 2.9132e-05 deg
M 307.631642454945 1.838e-05 deg
tp 2459234.537064837496
(2021-Jan-20.03706484)
8.2867e-05 TDB
period 1608.859763627519
4.40
1.1308e-05
3.096e-08
d
yr
n .2237609567587811 1.5727e-09 deg/d
Q 3.186467324851538 1.493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1057  
   data-arc span      9798 days (26.83 yr)  
   first obs. used      1993-10-09  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52747  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:12:44  

Additional Information
 Earth MOID = 1.23535 au 
 Jupiter MOID = 2.05598 au 
 T_jup = 3.321 
[ 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 14.8   n/a MPO359267  
diameter diameter 6.139 km 0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74504 (1999 DF7)          Discovered 1999-Feb-18 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 DF7 = 1993 TM33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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