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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04424558824918868 3.2317e-08  
a 2.871751712089781 1.1558e-08 au
q 2.744689368282754 9.1774e-08 au
i 1.438217554432665 4.4362e-06 deg
node 334.4064655949013 0.00014528 deg
peri 94.49407254944784 0.00015474 deg
M 128.9163514965219 5.383e-05 deg
tp 2458363.962102962657
(2018-Sep-02.46210296)
0.00026497 TDB
period 1777.537451791954
4.87
1.0731e-05
2.938e-08
d
yr
n .2025273783329179 1.2227e-09 deg/d
Q 2.998814055896808 1.2069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2653  
   data-arc span      32313 days (88.47 yr)  
   first obs. used      1932-02-14  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43465  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:56:28  

Additional Information
 Earth MOID = 1.75912 au 
 Jupiter MOID = 2.12833 au 
 T_jup = 3.296 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456680.5 (2014-Jan-23.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04374283038449111 3.1782e-08  
q 2.748871426766053 8.9998e-08 au
tp 2456602.529963519185
(2013-Nov-06.02996352)
0.00026808 TDB
node 334.4708921209067 0.00014539 deg
peri 98.10191314879582 0.00015517 deg
i 1.438045774285164 4.4293e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2653  
   data-arc span      32313 days (88.47 yr)  
   first obs. used      1932-02-14  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43465  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:56:28  

Additional Information
 Jupiter MOID = 2.12833 au 
 T_jup = 3.296 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.010122346929788E-15 -2.83978947456718E-15 -1.945812374966667E-12 -5.300049600553551E-15 -4.155562846422458E-13 -4.725903892448128E-17
q -2.83978947456718E-15 8.099704417654025E-15 5.837333477971868E-12 1.481417657707481E-14 1.242618842464461E-12 1.523980281673115E-16
tp -1.945812374966667E-12 5.837333477971868E-12 7.186572180035706E-8 3.663453119432025E-11 1.455013781329071E-8 -1.843745954688818E-12
node -5.300049600553551E-15 1.481417657707481E-14 3.663453119432025E-11 2.11381303003812E-8 -2.112376623131819E-8 2.230335219582326E-10
peri -4.155562846422458E-13 1.242618842464461E-12 1.455013781329071E-8 -2.112376623131819E-8 2.40781401735049E-8 -2.233438666603254E-10
i -4.725903892448128E-17 1.523980281673115E-16 -1.843745954688818E-12 2.230335219582326E-10 -2.233438666603254E-10 1.961896931418576E-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-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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