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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04428817240000975 3.4684e-08  
a 2.872804675282292 1.3653e-08 au
q 2.745573406551836 1.0128e-07 au
i 1.437914700480865 4.8204e-06 deg
node 334.4056842660472 0.00015996 deg
peri 94.99070282796238 0.00016994 deg
M 47.42573997102684 5.6591e-05 deg
tp 2458366.201671539886
(2018-Sep-04.70167154)
0.00027958 TDB
period 1778.515175454725
4.87
1.2679e-05
3.471e-08
d
yr
n .2024160406210514 1.443e-09 deg/d
Q 3.000035944012748 1.4258e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2227  
   data-arc span      32073 days (87.81 yr)  
   first obs. used      1932-02-14  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46274  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:20:40  

Additional Information
 Earth MOID = 1.75981 au 
 Jupiter MOID = 2.12774 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455907.5 (2011-Dec-12.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04250318926932324 3.4773e-08  
q 2.750230868582707 1.0121e-07 au
tp 2456603.336182530818
(2013-Nov-06.83618253)
0.00029074 TDB
node 334.5191270109815 0.00016013 deg
peri 98.18401713475573 0.00017085 deg
i 1.437885095421461 4.8149e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2227  
   data-arc span      32073 days (87.81 yr)  
   first obs. used      1932-02-14  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46274  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:20:40  

Additional Information
 Jupiter MOID = 2.12774 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.209189026417619E-15 -3.490301081285338E-15 -7.446558324045834E-13 -1.494760880602987E-15 -1.517466922183289E-13 -1.959162835713211E-16
q -3.490301081285338E-15 1.024394853100201E-14 1.819092481499576E-12 4.160187799976293E-15 3.559609339973766E-13 7.294828100229398E-16
tp -7.446558324045834E-13 1.819092481499576E-12 8.452791955243172E-8 1.004295990648504E-11 1.732829983456681E-8 -1.022655753495598E-12
node -1.494760880602987E-15 4.160187799976293E-15 1.004295990648504E-11 2.564321586902882E-8 -2.563273890293556E-8 1.174288654030156E-10
peri -1.517466922183289E-13 3.559609339973766E-13 1.732829983456681E-8 -2.563273890293556E-8 2.918962883047571E-8 -1.176144822662751E-10
i -1.959162835713211E-16 7.294828100229398E-16 -1.022655753495598E-12 1.174288654030156E-10 -1.176144822662751E-10 2.318312971479527E-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 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-January); 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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