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3269 Vibert-Douglas (1981 EX16)
Classification: Main-belt Asteroid          SPK-ID: 2003269
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1574419039962922 3.9546e-08  
a 2.786857298249429 1.3628e-08 au
q 2.348089179047076 1.1448e-07 au
i 17.17372540898302 5.4552e-06 deg
node 353.2585084415339 1.3211e-05 deg
peri 43.78461662119761 2.2276e-05 deg
M 289.7326695989198 1.6816e-05 deg
tp 2459332.181674198945
(2021-Apr-27.68167420)
7.9845e-05 TDB
period 1699.301823906842
4.65
1.2465e-05
3.413e-08
d
yr
n .2118517116472746 1.554e-09 deg/d
Q 3.225625417451782 1.5774e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1842  
   data-arc span      20549 days (56.26 yr)  
   first obs. used      1964-08-08  
   last obs. used      2020-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43556  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:11:13  

Additional Information
 Earth MOID = 1.37959 au 
 Jupiter MOID = 2.34458 au 
 T_jup = 3.248 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.6   n/a MPO384781  
diameter diameter 11.659 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 17.9826 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.142   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3269 Vibert-Douglas (1981 EX16)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EX16 = 1969 RG = 1969 RR1 = 1979 YH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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