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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1492325400622663 4.2688e-08  
a 2.238080401951671 5.8942e-09 au
q 1.904085978704845 9.4268e-08 au
i 5.693419576269108 4.4243e-06 deg
node 191.9863594631355 3.1442e-05 deg
peri 183.6371618709017 3.3542e-05 deg
M 30.8275911273329 1.0473e-05 deg
tp 2459095.775319816042
(2020-Sep-03.27531982)
3.5592e-05 TDB
period 1222.959157285494
3.35
4.8312e-06
1.323e-08
d
yr
n .2943679663015596 1.1629e-09 deg/d
Q 2.572074825198497 6.7738e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1145  
   data-arc span      17312 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49562  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:08  

Additional Information
 Earth MOID = .903728 au 
 Jupiter MOID = 2.89119 au 
 T_jup = 3.616 
[ 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 15.94   n/a E2021B10  
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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