+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1789 Dobrovolsky (1966 QC) Classification: Main-belt Asteroid          SPK-ID: 2001789 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1882418893281776 2.7314e-08   a 2.213812539884605 4.772e-09 au q 1.797080284758316 6.0126e-08 au i 1.976231126925374 3.5252e-06 deg node 102.0818539298964 0.00010231 deg peri 214.92221081 0.00010289 deg M 134.6958683918901 1.2237e-05 deg tp 2458550.345635382861 (2019-Mar-07.84563538) 4.024e-05 TDB period 1203.122064521522 3.29 3.8901e-06 1.065e-08 d yr n .2992215092848213 9.6748e-10 deg/d Q 2.630544795010895 5.6703e-09 au   Orbit Determination Parameters    # obs. used (total)      3112      data-arc span      28178 days (77.15 yr)      first obs. used      1943-09-24      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41042      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:02:41   Additional Information  Earth MOID = .784036 au   Jupiter MOID = 2.65628 au   T_jup = 3.631  [ hide covariance matrix ] Orbital Elements at Epoch 2456567.5 (2013-Oct-02.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1876886965592818 2.721e-08   q 1.799048560785694 5.9837e-08 au tp 2456144.157862117924 (2012-Aug-04.65786212) 3.785e-05 TDB node 102.0981449236384 0.00010228 deg peri 214.91944544435 0.00010287 deg i 1.976111501741628 3.5261e-06 deg   Orbit Determination Parameters    # obs. used (total)      3112      data-arc span      28178 days (77.15 yr)      first obs. used      1943-09-24      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41042      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:02:41   Additional Information  Jupiter MOID = 2.65628 au   T_jup = 3.631  Orbit Covariance (6×6)   e q tp node peri i e 7.403669282942497E-16 -1.624776329177029E-15 -4.509093833775472E-15 -2.462355836369484E-16 -9.236237730624499E-15 -1.19259808205055E-17 q -1.624776329177029E-15 3.580447583331627E-15 4.571681068776957E-14 4.498197272085905E-16 3.106208025158647E-14 2.337079296656599E-17 tp -4.509093833775472E-15 4.571681068776957E-14 1.432647021103643E-9 -2.022314280777542E-12 4.271759573429605E-10 -1.529153471270254E-13 node -2.462355836369484E-16 4.498197272085905E-16 -2.022314280777542E-12 1.046161868498597E-8 -1.045548994007295E-8 -9.148518744343557E-11 peri -9.236237730624499E-15 3.106208025158647E-14 4.271759573429605E-10 -1.045548994007295E-8 1.058190172170533E-8 9.138019635752668E-11 i -1.19259808205055E-17 2.337079296656599E-17 -1.529153471270254E-13 -9.148518744343557E-11 9.138019635752668E-11 1.243303294548089E-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 12.3   n/a MPO502170   diameter diameter 7.922 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.8125 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.] geometric albedo albedo 0.185   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1789 Dobrovolsky (1966 QC)          Discovered 1966-Aug-19 by Chernykh, L. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1966 QC = 1936 KK = 1939 GR = 1943 SG = 1946 NA = 1953 TC2 = 1953 VX3 = 1955 EJ = 1956 PD = 1956 RT = 1969 OF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 10:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin