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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1499720614359816 4.9831e-08  
a 2.238292830847671 9.7745e-09 au
q 1.902611440908067 1.1342e-07 au
i 5.69475749370212 5.6036e-06 deg
node 192.0431462536368 4.6759e-05 deg
peri 183.5028772223612 4.9954e-05 deg
M 214.3661449730723 2.0904e-05 deg
tp 2459095.304484845419
(2020-Sep-02.80448485)		 7.3098e-05 TDB
period 1223.133278394743
3.35		 8.012e-06
2.194e-08		 d
yr
n .2943260610752649 1.9279e-09 deg/d
Q 2.573974220787275 1.124e-08 au
   Orbit Determination Parameters
   # obs. used (total)      707  
   data-arc span      16669 days (45.64 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56376  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:56:55  

Additional Information
 Earth MOID = .90286 au 
 Jupiter MOID = 2.88519 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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