+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14415 (1991 RQ7) Classification: Main-belt Asteroid          SPK-ID: 2014415 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2831900789000925 3.8935e-08   a 2.981383836443979 1.4685e-08 au q 2.137085512569948 1.1595e-07 au i 9.708125313787592 4.3167e-06 deg node 305.1519947075043 2.5961e-05 deg peri 9.225767158927308 2.7314e-05 deg M 226.0395542818519 1.1584e-05 deg tp 2459700.179820991081 (2022-Apr-30.67982099) 6.3537e-05 TDB period 1880.291859335502 5.15 1.3892e-05 3.803e-08 d yr n .1914596386792977 1.4145e-09 deg/d Q 3.82568216031801 1.8843e-08 au   Orbit Determination Parameters    # obs. used (total)      1373      data-arc span      12255 days (33.55 yr)      first obs. used      1986-10-02      last obs. used      2020-04-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54288      source      ORB      producer      Otto Matic      solution date      2020-May-20 04:00:59   Additional Information  Earth MOID = 1.12374 au   Jupiter MOID = 1.48671 au   T_jup = 3.176  [ 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 13.3   n/a MPO337380   diameter diameter 7.824 km 0.255 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.200   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14415 (1991 RQ7)          Discovered 1991-Sep-13 by Ueda, S., Kaneda, H. at Kushiro Reference: 20000418/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1991 RQ7 = 1986 TN9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 06:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin