+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74772 (1999 RT229) Classification: Main-belt Asteroid          SPK-ID: 2074772 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .22298789115205 2.6751e-08   a 2.333273557781734 8.3263e-09 au q 1.812981807651144 6.4602e-08 au i 4.592463765301388 3.1873e-06 deg node 95.40994613924725 5.6304e-05 deg peri 215.4083975954945 5.725e-05 deg M 309.149164846451 1.0623e-05 deg tp 2459184.383391481942 (2020-Nov-30.88339148) 3.8442e-05 TDB period 1301.807939507933 3.56 6.9683e-06 1.908e-08 d yr n .2765384885700386 1.4802e-09 deg/d Q 2.853565307912324 1.0183e-08 au   Orbit Determination Parameters    # obs. used (total)      829      data-arc span      9674 days (26.49 yr)      first obs. used      1994-01-19      last obs. used      2020-07-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56433      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:42:26   Additional Information  Earth MOID = .800841 au   Jupiter MOID = 2.42245 au   T_jup = 3.531  [ hide covariance matrix ] Orbital Elements at Epoch 2457637.5 (2016-Sep-06.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .222282702925261 2.6758e-08   q 1.815025980698326 6.4539e-08 au tp 2457882.390012689296 (2017-May-08.89001269) 3.8952e-05 TDB node 95.4162932592383 5.6309e-05 deg peri 215.3745674591536 5.7262e-05 deg i 4.591778105920551 3.1868e-06 deg   Orbit Determination Parameters    # obs. used (total)      829      data-arc span      9674 days (26.49 yr)      first obs. used      1994-01-19      last obs. used      2020-07-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56433      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:42:26   Additional Information  Jupiter MOID = 2.42245 au   T_jup = 3.531  Orbit Covariance (6×6)   e q tp node peri i e 7.159878528133015E-16 -1.71888787872009E-15 2.961133374721866E-13 -1.686992996024229E-15 9.899311905262982E-14 -7.317003836740131E-16 q -1.71888787872009E-15 4.165294343421939E-15 -7.24048252235093E-13 5.368328984713231E-15 -2.446325930920653E-13 1.845835916033939E-15 tp 2.961133374721866E-13 -7.24048252235093E-13 1.517285347421055E-9 2.807501043801329E-11 4.303134803289201E-10 -2.346547752093543E-12 node -1.686992996024229E-15 5.368328984713231E-15 2.807501043801329E-11 3.170679656783659E-9 -3.152157464831188E-9 -4.959655581924587E-11 peri 9.899311905262982E-14 -2.446325930920653E-13 4.303134803289201E-10 -3.152157464831188E-9 3.278917435325819E-9 4.875607243862308E-11 i -7.317003836740131E-16 1.845835916033939E-15 -2.346547752093543E-12 -4.959655581924587E-11 4.875607243862308E-11 1.015578865496638E-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 16.0   n/a MPO436306   diameter diameter 3.549 km 0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.068   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   74772 (1999 RT229)          Discovered 1999-Sep-08 by CSS at Catalina Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 RT229 = 2002 GF22  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-20 11:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin