+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   27660 Waterwayuni (1978 TR7) Classification: Main-belt Asteroid          SPK-ID: 2027660 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2100939865843771 3.4904e-08   a 2.79250120085699 1.5856e-08 au q 2.205813491027285 9.5621e-08 au i 9.34460221572872 4.1468e-06 deg node 88.12076430517887 3.0726e-05 deg peri 340.2374094790173 3.3375e-05 deg M 302.8724835073562 1.3426e-05 deg tp 2459270.977611890771 (2021-Feb-25.47761189) 6.4608e-05 TDB period 1704.466538348751 4.67 1.4517e-05 3.975e-08 d yr n .2112097784851558 1.7989e-09 deg/d Q 3.379188910686695 1.9187e-08 au   Orbit Determination Parameters    # obs. used (total)      1360      data-arc span      14529 days (39.78 yr)      first obs. used      1978-10-02      last obs. used      2018-07-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50921      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 01:04:48   Additional Information  Earth MOID = 1.22273 au   Jupiter MOID = 1.92968 au   T_jup = 3.277  [ 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 13.4   n/a MPO358888   diameter diameter 9.831 km 3.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.079   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   27660 Waterwayuni           Discovered 1978 Oct. 2 by L. V. Zhuravleva at the Crimean Astrophysical Observatory. Founded in 1809, St. Petersburg University of Waterway Communications is the oldest transport educational institute in Russia. The University offers training in 26 specialities of higher vocational education in the social sciences, natural sciences and technical engineering. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070601/MPCPages.arc Last Updated: 2007-06-06 [ show close-approach data ] Alternate Designations  1978 TR7 = 1983 XQ1 = 1999 GW19  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-10 09:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin