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JPL Small-Body Database Browser
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20660 (1999 UF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020660
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0851200551487811 4.2791e-08  
a 3.20254330774172 2.0349e-08 au
q 2.929942644770385 1.3369e-07 au
i 4.912179083501111 5.3287e-06 deg
node 18.20484971537944 5.0104e-05 deg
peri 106.39652461194 5.8591e-05 deg
M 54.59297601862069 3.0308e-05 deg
tp 2458283.050086725935
(2018-Jun-13.55008673)
0.00017545 TDB
period 2093.345648342817
5.73
1.9952e-05
5.463e-08
d
yr
n .171973510578624 1.6391e-09 deg/d
Q 3.475143970713055 2.2081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1390  
   data-arc span      8451 days (23.14 yr)  
   first obs. used      1996-03-21  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50343  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:54:20  

Additional Information
 Earth MOID = 1.95067 au 
 Jupiter MOID = 1.5811 au 
 T_jup = 3.182 
[ 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 13.4   n/a MPO395201  
diameter diameter 11.147 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 13.056 h n/a LCDB (Rev. 2019-January); 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.]
geometric albedo albedo 0.082   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20660 (1999 UF)          Discovered 1999-Oct-16 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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