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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1510979745909476 3.0369e-08  
a 3.107660223671859 1.6097e-08 au
q 2.63809905815819 9.3084e-08 au
i 4.957368483337567 3.7321e-06 deg
node 173.9015746757038 4.0634e-05 deg
peri 271.0521062544084 4.267e-05 deg
M 189.0169880002406 1.4797e-05 deg
tp 2459950.884146128240
(2023-Jan-06.38414613)
8.6625e-05 TDB
period 2001.007518844314
5.48
1.5547e-05
4.257e-08
d
yr
n .1799093689602519 1.3978e-09 deg/d
Q 3.577221389185528 1.8529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1713  
   data-arc span      20642 days (56.51 yr)  
   first obs. used      1962-12-30  
   last obs. used      2019-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51132  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:24:27  

Additional Information
 Earth MOID = 1.66014 au 
 Jupiter MOID = 1.68001 au 
 T_jup = 3.197 
[ 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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