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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1008150516864391 3.6563e-08  
a 2.616914090844426 1.129e-08 au
q 2.353089761516974 9.8685e-08 au
i 11.70064162625976 5.2679e-07 deg
node 310.0404817882837 3.1385e-06 deg
peri 203.0280698542538 6.7158e-06 deg
M 28.62154752059934 4.4331e-06 deg
tp 2459077.565653686628
(2020-Aug-16.06565369)
1.8946e-05 TDB
period 1546.260370476547
4.23
1.0006e-05
2.739e-08
d
yr
n .2328197804675357 1.5066e-09 deg/d
Q 2.880738420171878 1.2428e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2369  
   data-arc span      32941 days (90.19 yr)  
   first obs. used      1930-12-20  
   last obs. used      2021-02-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41998  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:21:49  

Additional Information
 Earth MOID = 1.36878 au 
 Jupiter MOID = 2.15849 au 
 T_jup = 3.370 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456881.5 (2014-Aug-12.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1008740410212133 3.6797e-08  
q 2.353058408293129 9.9305e-08 au
tp 2457534.034268175637
(2016-May-25.53426818)
1.9927e-05 TDB
node 310.103990794971 3.1336e-06 deg
peri 203.6341693530736 6.5129e-06 deg
i 11.70601845567654 5.2712e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2369  
   data-arc span      32941 days (90.19 yr)  
   first obs. used      1930-12-20  
   last obs. used      2021-02-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41998  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:21:49  

Additional Information
 Jupiter MOID = 2.15849 au 
 T_jup = 3.370 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.354037936436401E-15 -3.636325490831002E-15 2.767418114582716E-13 2.049234622741885E-14 1.417932950715226E-13 3.546193910400055E-15
q -3.636325490831002E-15 9.861527235185615E-15 -8.025531883260183E-13 -5.519470761468655E-14 -3.998507965310338E-13 -9.444484889567511E-15
tp 2.767418114582716E-13 -8.025531883260183E-13 3.970926853239041E-10 9.747449311991175E-12 1.069692504305885E-10 5.396684795576228E-13
node 2.049234622741885E-14 -5.519470761468655E-14 9.747449311991175E-12 9.819628328409248E-12 -5.776678084017502E-12 1.411830860626731E-12
peri 1.417932950715226E-13 -3.998507965310338E-13 1.069692504305885E-10 -5.776678084017502E-12 4.241786603229268E-11 -1.054457555496255E-12
i 3.546193910400055E-15 -9.444484889567511E-15 5.396684795576228E-13 1.411830860626731E-12 -1.054457555496255E-12 2.778543838669792E-13

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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