+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74779 (1999 RF241) Classification: Mars-crossing Asteroid          SPK-ID: 2074779 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3088310475105654 4.2633e-08   a 2.353773550597097 1.3272e-08 au q 1.626855199363533 9.8903e-08 au i 23.87049602346151 7.1622e-06 deg node 71.19781616047945 1.2013e-05 deg peri 45.13244354101047 1.7058e-05 deg M 194.6777675402189 1.4809e-05 deg tp 2459606.223195593084 (2022-Jan-26.72319559) 5.7803e-05 TDB period 1319.001970691142 3.61 1.1156e-05 3.054e-08 d yr n .2729336331555018 2.3085e-09 deg/d Q 3.080691901830661 1.7371e-08 au   Orbit Determination Parameters    # obs. used (total)      914      data-arc span      9741 days (26.67 yr)      first obs. used      1992-11-26      last obs. used      2019-07-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46509      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 17:21:54   Additional Information  Earth MOID = .70212 au   Jupiter MOID = 2.31795 au   T_jup = 3.381  [ 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 14.5   n/a MPO436306   diameter diameter 2.769 km 0.377 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 6.1895 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.] geometric albedo albedo 0.425   0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   74779 (1999 RF241)          Discovered 1999-Sep-11 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 RF241 = 1992 WB8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-05 08:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin