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118025 (2121 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2118025
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2023200428236253 3.518e-08  
a 2.202125880799426 8.2793e-09 au
q 1.756591678293073 7.5546e-08 au
i 4.793656332733937 3.9944e-06 deg
node 188.1192168851899 5.8259e-05 deg
peri 172.5966833152262 5.9637e-05 deg
M 165.3256956653314 1.3918e-05 deg
tp 2458652.349901469874
(2019-Jun-17.84990147)
4.4793e-05 TDB
period 1193.607773290779
3.27
6.7314e-06
1.843e-08
d
yr
n .3016066148827762 1.7009e-09 deg/d
Q 2.64766008330578 9.9544e-09 au
  Orbit Determination Parameters
   # obs. used (total)      495  
   data-arc span      17284 days (47.32 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53178  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:36:54  

Additional Information
 Earth MOID = .752098 au 
 Jupiter MOID = 2.80977 au 
 T_jup = 3.633 
[ 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 16.66   n/a E2021B55  
diameter diameter 1.308 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.236   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118025 (2121 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2121 T-2 = 1999 RE50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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