+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249018 (2007 RF139) Classification: Main-belt Asteroid          SPK-ID: 2249018 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09668299348412385 5.2925e-08   a 2.406272703263728 1.9382e-08 au q 2.173627055173056 1.267e-07 au i 4.382996709510905 5.2978e-06 deg node 215.2541906072209 7.6822e-05 deg peri 63.96971842187054 8.206e-05 deg M 200.9467491276865 3.0932e-05 deg tp 2459602.859470445404 (2022-Jan-23.35947045) 0.00011816 TDB period 1363.376153401794 3.73 1.6473e-05 4.51e-08 d yr n .2640503863161718 3.1903e-09 deg/d Q 2.6389183513544 2.1256e-08 au   Orbit Determination Parameters    # obs. used (total)      233      data-arc span      8032 days (21.99 yr)      first obs. used      1998-01-31      last obs. used      2020-01-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5084      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 10:18:59   Additional Information  Earth MOID = 1.16163 au   Jupiter MOID = 2.45065 au   T_jup = 3.512  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.9   n/a MPO454844   diameter diameter 2.625 km 0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.049   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   249018 (2007 RF139)          Discovered 2007-Sep-15 by Ferrando, R. at Pla D'Arguines Reference: 20100824/Numbers.arc Last Updated: 2010-08-27 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1976-Jan-17 03:46 < 00:01 Juno 0.02027963888195 0.020275197151209 0.0202840952550434 7.18024413944044 7.18024405589042 2442794.656985724 0.500169726608882 943.218085635625 77.4640668557533 -77.2269016332286 38188.2577059208 T 11 CATAB v2.0f-lin.ifort 2020-Feb-25 10:19:02 2020-Feb-25 10:19 2064-Dec-03 21:13 00:03 David 0.0382066404063984 0.0381811811459042 0.0382320996671043 6.24183783551006 6.24183777216224 2475258.384295641 2.59163512988416 1269.11658636946 38.7976160602601 0.257581778323573 4549.78098465243 T 11 CATAB v2.0f-lin.ifort 2020-Feb-25 10:19:02 2020-Feb-25 10:19 2075-Oct-28 01:56 00:19 Psych 0.0442883803143298 0.0442839714112863 0.0442928009556169 2.20781543768107 2.20781531394377 2479238.580431657 19.0454518009609 1224.24198341862 74.0718531851774 -80.2323919631168 87895.2544038657 T 11 CATAB v2.0f-lin.ifort 2020-Feb-25 10:19:02 2020-Feb-25 10:19 2187-Feb-17 12:46 00:05 Amphi 0.0439066240044589 0.0438449504730577 0.0439684273965414 4.57244329632727 4.57244326769244 2519893.032245106 5.01092076544886 4862.75031987626 64.9689168744331 50.7415083067295 78254.0772813843 T 11 CATAB v2.0f-lin.ifort 2020-Feb-25 10:19:02 2020-Feb-25 10:19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 08:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin