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16991 (1999 CW4)
Classification: Main-belt Asteroid          SPK-ID: 2016991
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1573617940024685 3.3487e-08  
a 2.420960755095322 7.4183e-09 au
q 2.039994027463951 8.1417e-08 au
i .6737606813180477 3.6787e-06 deg
node 202.5748043870448 0.00026191 deg
peri 329.4193388730764 0.00026212 deg
M 281.566675321519 1.0418e-05 deg
tp 2459500.263102308415
(2021-Oct-12.76310231)
4.0321e-05 TDB
period 1375.878394463073
3.77
6.3239e-06
1.731e-08
d
yr
n .2616510306788323 1.2026e-09 deg/d
Q 2.801927482726692 8.5856e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1725  
   data-arc span      10029 days (27.46 yr)  
   first obs. used      1993-09-18  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50834  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:50:29  

Additional Information
 Earth MOID = 1.04514 au 
 Jupiter MOID = 2.16443 au 
 T_jup = 3.496 
[ 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 14.7   n/a MPO435857  
diameter diameter 2.816 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.322   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16991 (1999 CW4)          Discovered 1999-Feb-12 by Korlevic, K. at Visnjan
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CW4 = 1993 SQ9 = 1999 BL15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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