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20994 Atreya (1985 TS)
Classification: Main-belt Asteroid          SPK-ID: 2020994
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1238215900961896 3.5451e-08  
a 2.293869955107229 6.9847e-09 au
q 2.009839329791977 8.2495e-08 au
i 3.784873807767249 4.0468e-06 deg
node 5.179965462601778 5.3036e-05 deg
peri 359.7086599159405 5.4962e-05 deg
M .3155800268981493 1.5135e-05 deg
tp 2458999.387606033631
5.3349e-05 TDB
period 1268.970764179531
n .2836944791496143 1.2957e-09 deg/d
Q 2.577900580422481 7.8495e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1972  
   data-arc span      15368 days (42.08 yr)  
   first obs. used      1978-10-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50253  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:32  

Additional Information
 Earth MOID = 1.00776 au 
 Jupiter MOID = 2.87204 au 
 T_jup = 3.583 
[ 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 14.4   n/a MPO474041  

20994 Atreya           Discovered 1985 Oct. 15 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Prakash Atreya (b. 1985) is a meteor astronomer and programming specialist at the Arecibo Observatory. He has developed automated routines for video meteor analysis for many networks and has deployed meteor cameras for public outreach in his native Nepal.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

Alternate Designations
 1985 TS = 1978 TT3 = 1992 UK10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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