+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7711 Rip (1994 XF) Classification: Main-belt Asteroid          SPK-ID: 2007711 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2749863334268038 9.1437e-08   a 3.070807489278669 2.7042e-08 AU q 2.226377397142358 2.8107e-07 AU i 12.18362227891202 8.861e-06 deg node 61.21856998117162 3.5536e-05 deg peri 355.7094646631037 3.8996e-05 deg M 160.6853124004859 1.3377e-05 deg tp 2455523.194212742864 (2010-Nov-22.69421274) 6.9663e-05 JED period 1965.519304125358 5.38 2.5963e-05 7.108e-08 d yr n .1831577025188248 2.4194e-09 deg/d Q 3.915237581414978 3.4479e-08 AU   Orbit Determination Parameters    # obs. used (total)      766      data-arc span      22397 days (61.32 yr)      first obs. used      1951-12-22      last obs. used      2013-04-17      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .52944      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:27:41   Additional Information  Earth MOID = 1.23802 AU   T_jup = 3.138  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.90 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 diameter diameter 15.81 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 geometric albedo albedo 0.0489   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4 7711 Ríp           Discovered 1994 Dec. 2 by Z. Moravec at Klet. Named for a hill in central Bohemia (459 m above sea level) located about 30 km north of Prague. When a mythological ancestor of Cech, the Father of the Czech nation, came to Bohemia, he is said to have climbed this hill, looked around and made the decision to stay there because of the wealth and fertility of the country. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19980211/MPCPages.arc Last Updated: 2009-11-17 [ show close-approach data ] Alternate Designations  1994 XF = 1951 XT = 1951 YL = 1994 VL2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-26 04:51 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin