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20938 (1075 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2020938
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1744000400755278 2.7235e-08  
a 2.232113811723614 6.2681e-09 au
q 1.842833073505876 6.1191e-08 au
i 7.503299325247642 4.1161e-06 deg
node 350.6138204234911 2.4288e-05 deg
peri 271.7860060723933 2.7144e-05 deg
M 137.3122549580292 1.2993e-05 deg
tp 2458735.899441530722
(2019-Sep-09.39944153)
4.3631e-05 TDB
period 1218.071912809701
3.33
5.1308e-06
1.405e-08
d
yr
n .2955490527399122 1.2449e-09 deg/d
Q 2.621394549941351 7.3613e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1144  
   data-arc span      17301 days (47.37 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54174  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:01  

Additional Information
 Earth MOID = .844697 au 
 Jupiter MOID = 2.49488 au 
 T_jup = 3.610 
[ 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 15.64   n/a E2021B10  
diameter diameter 2.589 km 0.278 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.166   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20938 (1075 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
 1075 T-2 = 1993 RL17 = 1999 GP60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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