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9738 (1987 DF6)
Classification: Main-belt Asteroid          SPK-ID: 2009738
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1221071538849308 5.5128e-08  
a 2.666729151994396 2.2212e-08 au
q 2.341102445062385 1.4455e-07 au
i 12.52052763850569 7.2552e-06 deg
node 329.9533782536902 2.6405e-05 deg
peri 250.1702315152087 4.0414e-05 deg
M 175.5325495605952 3.152e-05 deg
tp 2456624.928306855009
(2013-Nov-28.42830685)
0.00013947 JED
period 1590.621284947569
4.35
1.9873e-05
5.441e-08
d
yr
n .2263266582729442 2.8277e-09 deg/d
Q 2.992355858926406 2.4924e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1119  
   data-arc span      12875 days (35.25 yr)  
   first obs. used      1980-09-13  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48655  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:11:45  

Additional Information
 Earth MOID = 1.36945 au 
 Jupiter MOID = 2.11283 au 
 T_jup = 3.338 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0 mag n/a MPO347603  
rotation period rot_per 3.1647 h n/a LCDB (Rev. 2015-December); 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. (2015) Astron. J. 150, A75.]

9738 (1987 DF6)          Discovered 1987-Feb-23 by Debehogne, H. at La Silla
Reference: 19981208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 DF6 = 1980 RR7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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