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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491134782827554 3.0136e-08  
a 3.11185554486051 1.6889e-08 au
q 2.64783594065288 9.2131e-08 au
i 4.966192391196746 3.7087e-06 deg
node 173.6562560242297 4.0458e-05 deg
peri 271.466974795867 4.2578e-05 deg
M 224.6405708391688 1.5164e-05 deg
tp 2459954.399721635748
(2023-Jan-09.89972164)
8.8069e-05 TDB
period 2005.060906886603
5.49
1.6323e-05
4.469e-08
d
yr
n .179545668046063 1.4616e-09 deg/d
Q 3.57587514906814 1.9407e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1753  
   data-arc span      21022 days (57.56 yr)  
   first obs. used      1962-12-30  
   last obs. used      2020-07-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .507  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:15:25  

Additional Information
 Earth MOID = 1.66956 au 
 Jupiter MOID = 1.67963 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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