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JPL Small-Body Database Browser
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185951 (2001 DE8)
Classification: Main-belt Asteroid          SPK-ID: 2185951
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .158654483454979 4.325e-08  
a 2.193905304486353 8.4073e-09 au
q 1.845832391653933 9.2904e-08 au
i 8.317229499924956 6.2139e-06 deg
node 148.7925844537923 2.631e-05 deg
peri 125.9403142841191 3.3046e-05 deg
M 229.2692198321088 1.9228e-05 deg
tp 2459431.523149853198
(2021-Aug-05.02314985)
6.4399e-05 TDB
period 1186.930375141005
3.25
6.8227e-06
1.868e-08
d
yr
n .3033033845453931 1.7434e-09 deg/d
Q 2.541978217318774 9.7412e-09 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      7450 days (20.40 yr)  
   first obs. used      1998-04-24  
   last obs. used      2018-09-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60324  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 12:00:48  

Additional Information
 Earth MOID = .843742 au 
 Jupiter MOID = 2.60153 au 
 T_jup = 3.640 
[ 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 16.7   n/a MPO245289  
rotation period rot_per 2.30 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

185951 (2001 DE8)          Discovered 2001-Feb-16 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 2001 DE8 = 2002 SJ61 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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