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2842 Unsold (1950 OD)
Classification: Main-belt Asteroid          SPK-ID: 2002842
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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 2-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.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1015312483790848 8.187e-08  
a 2.61778275581135 1.5822e-08 au
q 2.351996004628583 2.2113e-07 au
i 11.70216408573717 7.5708e-06 deg
node 310.0960914159584 2.2918e-05 deg
peri 203.6125884704708 3.5522e-05 deg
M 15.52374785858935 2.4384e-05 deg
tp 2457533.789697482031
0.00010491 JED
period 1547.030338629258
n .2327039043843038 2.1098e-09 deg/d
Q 2.883569506994117 1.7429e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1328  
   data-arc span      31167 days (85.33 yr)  
   first obs. used      1930-12-20  
   last obs. used      2016-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52278  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:41:16  

Additional Information
 Earth MOID = 1.36681 au 
 Jupiter MOID = 2.16179 au 
 T_jup = 3.370 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.5 mag n/a MPO365279  
rotation period rot_per 49.50 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2012) Minor Planet Bul. 39, 181-183.]

2842 Unsold (1950 OD)          Discovered 1950-Jul-25 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1950 OD = 1930 YT = 1933 QX = 1944 BC = 1978 EG4 = 1982 BJ3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-05 06:41 UT
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