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16721 (1995 WF3)
Classification: Main-belt Asteroid          SPK-ID: 2016721
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2308222382028766 4.3499e-08  
a 2.654788153477361 1.2555e-08 au
q 2.042004009937235 1.1608e-07 au
i 11.51563387877975 4.3431e-06 deg
node 57.28918300835584 2.505e-05 deg
peri 69.17711584671339 2.6964e-05 deg
M 241.4463249615573 8.9717e-06 deg
tp 2459720.802309716885
(2022-May-21.30230972)
4.0192e-05 TDB
period 1579.949600359002
4.33
1.1208e-05
3.069e-08
d
yr
n .2278553695119132 1.6164e-09 deg/d
Q 3.267572297017487 1.5453e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1080  
   data-arc span      24793 days (67.88 yr)  
   first obs. used      1953-01-10  
   last obs. used      2020-11-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50242  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:40:03  

Additional Information
 Earth MOID = 1.08967 au 
 Jupiter MOID = 1.95203 au 
 T_jup = 3.322 
[ 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 14.44   n/a E2021B10  
diameter diameter 6.221 km 0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.666 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 0.108   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

16721 (1995 WF3)          Discovered 1995-Nov-16 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 WF3 = 1992 AD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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