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2842 Unsold (1950 OD)
Classification: Main-belt Asteroid          SPK-ID: 2002842
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1008151300550098 6.2488e-08  
a 2.616914085443045 1.2373e-08 au
q 2.353089551576317 1.6779e-07 au
i 11.70064912494567 5.5002e-06 deg
node 310.0404768109601 1.808e-05 deg
peri 203.0280611303751 2.5372e-05 deg
M 28.62156237534424 1.8398e-05 deg
tp 2459077.565590263617
(2020-Aug-16.06559026)
7.8777e-05 TDB
period 1546.260365689262
4.23
1.0966e-05
3.002e-08
d
yr
n .2328197811883551 1.6511e-09 deg/d
Q 2.880738619309772 1.362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2262  
   data-arc span      32901 days (90.08 yr)  
   first obs. used      1930-12-20  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42697  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:06:05  

Additional Information
 Earth MOID = 1.36878 au 
 Jupiter MOID = 2.15849 au 
 T_jup = 3.370 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456805.5 (2014-May-28.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1008116291462429 6.2693e-08  
q 2.353367080554977 1.6827e-07 au
tp 2457534.031935280908
(2016-May-25.53193528)
7.6727e-05 TDB
node 310.1035464555034 1.8063e-05 deg
peri 203.6199141413451 2.5339e-05 deg
i 11.70591909183975 5.5025e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2262  
   data-arc span      32901 days (90.08 yr)  
   first obs. used      1930-12-20  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42697  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:06:05  

Additional Information
 Jupiter MOID = 2.15849 au 
 T_jup = 3.370 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.930378583340708E-15 -1.052921977736586E-14 -9.571067319876457E-13 -5.072796414413424E-15 -5.47054353683787E-14 -2.91429069610921E-15
q -1.052921977736586E-14 2.831413652979161E-14 2.623540198127506E-12 1.263506363142531E-14 1.481153338775279E-13 8.519662964754176E-15
tp -9.571067319876457E-13 2.623540198127506E-12 5.88701077821222E-9 3.042324614567522E-12 1.356007571624866E-9 4.428263864146749E-12
node -5.072796414413424E-15 1.263506363142531E-14 3.042324614567522E-12 3.262739133738338E-10 -3.183417841538273E-10 2.489116148640324E-11
peri -5.47054353683787E-14 1.481153338775279E-13 1.356007571624866E-9 -3.183417841538273E-10 6.420824373515103E-10 -2.346327415975725E-11
i -2.91429069610921E-15 8.519662964754176E-15 4.428263864146749E-12 2.489116148640324E-11 -2.346327415975725E-11 3.027802154918075E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.56   n/a E2020-QM5  
diameter diameter 13.716 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 49.50 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2012) Minor Planet Bull. 39, 181-183.]
geometric albedo albedo 0.149   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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