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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1222784642189429 5.5115e-08  
a 2.666299885327727 2.2083e-08 au
q 2.340268830202709 1.4451e-07 au
i 12.5204332614341 7.1808e-06 deg
node 329.949342652538 2.6388e-05 deg
peri 250.2028982019355 4.0156e-05 deg
M 220.7730142360702 3.1325e-05 deg
tp 2458215.510935391569
(2018-Apr-07.01093539)
0.00013891 JED
period 1590.237234011318
4.35
1.9756e-05
5.409e-08
d
yr
n .2263813173911873 2.8125e-09 deg/d
Q 2.992330940452745 2.4784e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1140  
   data-arc span      12906 days (35.33 yr)  
   first obs. used      1980-09-13  
   last obs. used      2016-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49014  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:36:11  

Additional Information
 Earth MOID = 1.36874 au 
 Jupiter MOID = 2.11324 au 
 T_jup = 3.339 
[ 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. 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.]

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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