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16638 (1993 QN3)
Classification: Main-belt Asteroid          SPK-ID: 2016638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05785778527260991 3.0975e-08  
a 2.699277647665933 1.1319e-08 au
q 2.543103421136122 7.9881e-08 au
i 4.825775979395887 3.772e-06 deg
node 159.5631056858733 4.1727e-05 deg
peri 133.4205936100036 5.5567e-05 deg
M 100.8314817192566 3.7444e-05 deg
tp 2458746.805606149739
(2019-Sep-20.30560615)
0.00016778 TDB
period 1619.8312174054
4.43
1.0189e-05
2.79e-08
d
yr
n .2222453772539573 1.3979e-09 deg/d
Q 2.855451874195744 1.1974e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1970  
   data-arc span      25599 days (70.09 yr)  
   first obs. used      1951-02-04  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46116  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:37:28  

Additional Information
 Earth MOID = 1.52816 au 
 Jupiter MOID = 2.24782 au 
 T_jup = 3.361 
[ 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 13.98   n/a E2021B10  
diameter diameter 7.574 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 34.632 h n/a LCDB (Rev. 2020-October); 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 0.102   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16638 (1993 QN3)          Discovered 1993-Aug-18 by Elst, E. W. at Caussols
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 QN3 = 1998 UT20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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