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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1571662881304459 2.3056e-08  
a 2.785244491444319 1.263e-08 au
q 2.347497953188244 6.6669e-08 au
i 17.17965532423658 9.4913e-07 deg
node 353.2483407696657 2.574e-06 deg
peri 43.95840762266024 7.7689e-06 deg
M 331.956663105201 7.1888e-06 deg
tp 2459332.757588992328
(2021-Apr-28.25758899)		 3.4121e-05 TDB
period 1697.826910394118
4.65		 1.1548e-05
3.162e-08		 d
yr
n .2120357486361392 1.4422e-09 deg/d
Q 3.222991029700394 1.4615e-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-Apr-12 14:54:54  

Additional Information
 Earth MOID = 1.378 au 
 Jupiter MOID = 2.34881 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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