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JPL Small-Body Database Browser
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1161 Thessalia (1929 SF)
Classification: Main-belt Asteroid          SPK-ID: 2001161
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08803183733998482 4.2585e-08  
a 3.169590169558098 1.6669e-08 au
q 2.890565323317144 1.3777e-07 au
i 9.396508263220992 3.9879e-06 deg
node 72.56421292408918 2.7153e-05 deg
peri 310.1720299022386 3.4152e-05 deg
M 26.73656655951362 2.0148e-05 deg
tp 2458847.424309023899
(2019-Dec-29.92430902)
0.00011551 TDB
period 2061.1191279453
5.64
1.6259e-05
4.451e-08
d
yr
n .1746623934148235 1.3778e-09 deg/d
Q 3.448615015799051 1.8136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2344  
   data-arc span      32999 days (90.35 yr)  
   first obs. used      1929-09-29  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46122  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:47:23  

Additional Information
 Earth MOID = 1.90613 au 
 Jupiter MOID = 1.98962 au 
 T_jup = 3.176 
[ 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 11.2   n/a MPO502164  
diameter diameter 21.498 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.065   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1161 Thessalia (1929 SF)          Discovered 1929-Sep-29 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1929 SF = 1931 BB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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