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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1478009017135843 2.9101e-08  
a 3.110986485579367 1.7774e-08 au
q 2.651179877791962 8.9063e-08 au
i 4.983131238304124 3.6936e-06 deg
node 173.4862481446796 3.9222e-05 deg
peri 272.03857312873 4.1492e-05 deg
M 259.230951954693 1.5433e-05 deg
tp 2459957.509568640066
(2023-Jan-13.00956864)
8.8529e-05 TDB
period 2004.221024491752
5.49
1.7176e-05
4.703e-08
d
yr
n .1796209078743159 1.5394e-09 deg/d
Q 3.570793093366771 2.0401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1796  
   data-arc span      21374 days (58.52 yr)  
   first obs. used      1962-12-30  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50434  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:08:12  

Additional Information
 Earth MOID = 1.67329 au 
 Jupiter MOID = 1.68249 au 
 T_jup = 3.196 
[ 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 13.41   n/a E2021B10  
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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