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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1571313704000047 2.3081e-08  
a 2.785068336548913 1.2507e-08 au
q 2.34744673216932 6.6646e-08 au
i 17.18004494915611 9.4917e-07 deg
node 353.2485225736643 2.5738e-06 deg
peri 44.00413183696494 7.7731e-06 deg
M 13.48366590483258 7.266e-06 deg
tp 2459332.914558229918
(2021-Apr-28.41455823)
3.4156e-05 TDB
period 1697.665842419407
4.65
1.1436e-05
3.131e-08
d
yr
n .2120558657685841 1.4284e-09 deg/d
Q 3.222689940928504 1.4472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2076  
   data-arc span      20642 days (56.51 yr)  
   first obs. used      1964-08-08  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42613  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:57:54  

Additional Information
 Earth MOID = 1.37853 au 
 Jupiter MOID = 2.35005 au 
 T_jup = 3.249 
[ 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 12.73   n/a E2021B10  
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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