+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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  [ 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.DB Last 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 ] 2020-Sep-21 04:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin