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1142 Aetolia (1930 BC)
Classification: Main-belt Asteroid          SPK-ID: 2001142
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08092095638211928 4.3094e-08  
a 3.183378950460153 1.822e-08 au
q 2.92577688126221 1.3817e-07 au
i 2.109711333149117 4.6938e-06 deg
node 139.3427584154787 0.00012528 deg
peri 96.26467615188699 0.00012938 deg
M 21.03017871790669 3.3467e-05 deg
tp 2457479.308712338653
0.00019285 JED
period 2074.58358501423
n .1735287999965211 1.4897e-09 deg/d
Q 3.440981019658095 1.9694e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1931  
   data-arc span      41649 days (114.03 yr)  
   first obs. used      1902-04-07  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52458  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:32:17  

Additional Information
 Earth MOID = 1.91496 au 
 Jupiter MOID = 1.54952 au 
 T_jup = 3.193 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.2 mag n/a MPO253368  
rotation period rot_per 10.730 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Behrend, R. (2010) Observatoire de Geneve web site,]
[Durkee, R.I. (2011) Minor Planet Bul. 38, 39-40.]

1142 Aetolia (1930 BC)          Discovered 1930-Jan-24 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 BC = 1931 LC = 1937 LN = 1937 LU = 1942 GF = 1942 GS = 1943 PF = 1948 JS = 1948 KG = 1954 KJ = 1954 MU = 1958 BB = A902 GB = A907 CB = A908 GB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-05 14:16 UT
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