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18366 (1991 DG1)
Classification: Main-belt Asteroid          SPK-ID: 2018366
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534248818936483 3.1066e-08  
a 3.100629538019567 1.6399e-08 au
q 2.624915817352957 9.5852e-08 au
i 4.960613384010475 3.7917e-06 deg
node 174.0891776246181 4.1237e-05 deg
peri 270.4422281180039 4.3192e-05 deg
M 117.3844455902056 1.4289e-05 deg
tp 2457950.248595038585
(2017-Jul-15.74859504)		 7.6716e-05 TDB
period 1994.220823799175
5.46		 1.5821e-05
4.332e-08		 d
yr
n .1805216331630549 1.4322e-09 deg/d
Q 3.576343258686176 1.8915e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1666  
   data-arc span      20586 days (56.36 yr)  
   first obs. used      1962-12-30  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50229  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:35:58  

Additional Information
 Earth MOID = 1.64689 au 
 Jupiter MOID = 1.68467 au 
 T_jup = 3.198 
[ 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 13.5   n/a MPO347667  
diameter diameter 7.337 km 0.247 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18366 (1991 DG1)          Discovered 1991-Feb-18 by Helin, E. F. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 DG1 = 1962 YA = 1999 RK118 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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