+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1829 Dawson (1967 JJ) Classification: Main-belt Asteroid          SPK-ID: 2001829 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1211062582706856 1.4912e-08   a 2.250672552352075 5.0318e-09 au q 1.978102020944182 3.4854e-08 au i 6.336625581662176 8.8155e-07 deg node 293.3729839507718 2.3381e-06 deg peri 142.4717616173447 6.7912e-06 deg M 113.1634309546747 8.5231e-06 deg tp 2458812.822582111679 (2019-Nov-25.32258211) 2.8747e-05 TDB period 1233.294795521841 3.38 4.1359e-06 1.132e-08 d yr n .2919010128861154 9.789e-10 deg/d Q 2.523243083759969 5.6412e-09 au   Orbit Determination Parameters    # obs. used (total)      2576      data-arc span      33649 days (92.13 yr)      first obs. used      1929-01-29      last obs. used      2021-03-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39082      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 13:00:11   Additional Information  Earth MOID = .997377 au   Jupiter MOID = 2.68902 au   T_jup = 3.610  [ hide covariance matrix ] Orbital Elements at Epoch 2456501.5 (2013-Jul-28.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1206912339917462 1.4867e-08   q 1.979331339316535 3.4766e-08 au tp 2456344.847845342649 (2013-Feb-21.34784534) 2.7371e-05 TDB node 293.4692578425695 2.3391e-06 deg peri 142.2365009306273 6.8366e-06 deg i 6.334492941317408 8.8124e-07 deg   Orbit Determination Parameters    # obs. used (total)      2576      data-arc span      33649 days (92.13 yr)      first obs. used      1929-01-29      last obs. used      2021-03-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39082      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 13:00:11   Additional Information  Jupiter MOID = 2.68902 au   T_jup = 3.610  Orbit Covariance (6×6)   e q tp node peri i e 2.210257575105578E-16 -5.129223793045051E-16 -1.053117908964838E-13 3.907606919068104E-15 -1.648042104943188E-14 -2.493265819594716E-15 q -5.129223793045051E-16 1.208663940257061E-15 2.428506985586783E-13 -8.666604830477838E-15 4.035399170743175E-14 5.698592043527906E-15 tp -1.053117908964838E-13 2.428506985586783E-13 7.491905915748266E-10 1.915444831848553E-11 1.767904487455253E-10 1.08581584690562E-12 node 3.907606919068104E-15 -8.666604830477838E-15 1.915444831848553E-11 5.471361915870066E-12 5.603641439769136E-13 -6.829345600057681E-13 peri -1.648042104943188E-14 4.035399170743175E-14 1.767904487455253E-10 5.603641439769136E-13 4.673865729067129E-11 8.225579204724455E-13 i -2.493265819594716E-15 5.698592043527906E-15 1.08581584690562E-12 -6.829345600057681E-13 8.225579204724455E-13 7.765836982264971E-13 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.45   n/a E2021B10   diameter diameter 8.068 km 0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 4.254 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Stephens, R.D. (2003) Minor Planet Bull. 30, 31.] [Pray, D.P. (2006) Minor Planet Bull. 33, 4-5.] [Galad, A. (2010) Astron. Astrophys. 514, A55.] [Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm] [Oey, J.; Williams, H.; Groom, R.; Pray, D.; Benishek, V. (2017) Minor Planet Bull. 44, 193-199.] [Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.271   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   1829 Dawson (1967 JJ)          Discovered 1967-May-06 by Cesco, C. U. and Klemola, A. R. at El Leoncito Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1967 JJ = 1929 BF = 1936 DN = 1966 BK = 1971 OA1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-15 18:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin