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121000 (1998 YG2)
Classification: Main-belt Asteroid          SPK-ID: 2121000
[ 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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1867653206402907 3.3251e-08  
a 2.323099176878392 8.4144e-09 au
q 1.889224814229504 7.8342e-08 au
i 5.296459727525153 5.2052e-06 deg
node 305.9472056930491 4.9001e-05 deg
peri 110.2815513038625 5.1935e-05 deg
M 119.5790527142874 1.6351e-05 deg
tp 2458770.911485833994
(2019-Oct-14.41148583)		 5.7986e-05 TDB
period 1293.302309972928
3.54		 7.0266e-06
1.924e-08		 d
yr
n .2783571924552859 1.5123e-09 deg/d
Q 2.756973539527281 9.9859e-09 au
   Orbit Determination Parameters
   # obs. used (total)      820  
   data-arc span      7821 days (21.41 yr)  
   first obs. used      1998-12-17  
   last obs. used      2020-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54202  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:53:16  

Additional Information
 Earth MOID = .908276 au 
 Jupiter MOID = 2.60017 au 
 T_jup = 3.547 
[ 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 15.76   n/a E2021B55  
diameter diameter 2.569 km 1.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.169   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

121000 (1998 YG2)          Discovered 1998-Dec-17 by ODAS at Caussols
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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