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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2021812889562382 3.5223e-08  
a 2.202298598962726 8.2855e-09 au
q 1.757035029557925 7.566e-08 au
i 4.793107965536401 4.0142e-06 deg
node 188.1251000161354 5.9173e-05 deg
peri 172.590137832698 6.0567e-05 deg
M 105.0199345583362 1.3854e-05 deg
tp 2458652.257338611110
(2019-Jun-17.75733861)
4.5112e-05 TDB
period 1193.748202445906
3.27
6.7367e-06
1.844e-08
d
yr
n .301571134735437 1.7018e-09 deg/d
Q 2.647562168367528 9.9606e-09 au
  Orbit Determination Parameters
   # obs. used (total)      488  
   data-arc span      16935 days (46.37 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53093  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:53:02  

Additional Information
 Earth MOID = .754166 au 
 Jupiter MOID = 2.80896 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 16.5   n/a MPO502792  
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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