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2785 Sedov (1978 QN2)
Classification: Main-belt Asteroid          SPK-ID: 2002785
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04424558793904852 3.233e-08  
a 2.871751712331673 1.1584e-08 au
q 2.744689369404589 9.1837e-08 au
i 1.43821768093285 4.4588e-06 deg
node 334.4064640689061 0.00014536 deg
peri 94.49407312703507 0.00015485 deg
M 128.916352319562 5.392e-05 deg
tp 2458363.962098818386
(2018-Sep-02.46209882)
0.00026544 TDB
period 1777.537452016542
4.87
1.0755e-05
2.945e-08
d
yr
n .2025273783073291 1.2254e-09 deg/d
Q 2.998814055258757 1.2097e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2591  
   data-arc span      32265 days (88.34 yr)  
   first obs. used      1932-02-14  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43693  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:49:50  

Additional Information
 Earth MOID = 1.75912 au 
 Jupiter MOID = 2.12833 au 
 T_jup = 3.296 
[ 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 12.4   n/a MPO452201  
diameter diameter 9.438 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.49 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Polishook, D. (2009) Minor Planet Bull. 36, 104-107.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Szabo, R.; Pal, A.; Sarneczky, K.; Szabo, Gy.M.; et al. (2016) Astron. Astrophys. 596, A40.]
geometric albedo albedo 0.261   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2785 Sedov (1978 QN2)          Discovered 1978-Aug-31 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1978 QN2 = 1932 CX = 1954 UO = 1966 CG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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