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20945 (2248 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2020945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .149248458174718 4.4078e-08  
a 2.238122653068381 6.2163e-09 au
q 1.904086297892016 9.7687e-08 au
i 5.693377916640048 5.0489e-06 deg
node 191.9872467864349 3.3987e-05 deg
peri 183.5925450955967 3.6089e-05 deg
M 331.9868959805473 1.1353e-05 deg
tp 2459095.666256145835
(2020-Sep-03.16625615)
3.8596e-05 TDB
period 1222.993788503774
3.35
5.0952e-06
1.395e-08
d
yr
n .294359630755303 1.2264e-09 deg/d
Q 2.572159008244746 7.144e-09 au
  Orbit Determination Parameters
   # obs. used (total)      971  
   data-arc span      17205 days (47.10 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51057  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:48  

Additional Information
 Earth MOID = .905148 au 
 Jupiter MOID = 2.88999 au 
 T_jup = 3.615 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO319346  
diameter diameter 1.582 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.370   0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20945 (2248 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2248 T-2 = 1990 WQ11 = 1998 EP7 = 2000 UQ55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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