+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4034 Vishnu (1986 PA) Classification: Apollo [NEO, PHA]          SPK-ID: 2004034 [ 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 57 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4440720981633577 6.0546e-08   a 1.059577849013902 2.1528e-09 AU q .5890488904348814 6.3897e-08 AU i 11.16848683434289 6.6369e-06 deg node 157.9823013399437 3.6123e-05 deg peri 296.5790351946187 3.2476e-05 deg M 65.47028355331361 1.1954e-05 deg tp 2456328.049822494594 (2013-Feb-04.54982249) 1.3215e-05 JED period 398.3801884821108 1.09 1.2141e-06 3.324e-09 d yr n .90365939473962 2.7541e-09 deg/d Q 1.530106807592924 3.1088e-09 AU   Orbit Determination Parameters    # obs. used (total)      416      # delay obs. used      0      # Doppler obs. used      1      data-arc span      9788 days (26.80 yr)      first obs. used      1986-08-02      last obs. used      2013-05-20      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50327      data source      ORB      producer      Otto Matic      solution date      2013-May-22 01:47:27   Additional Information  Earth MOID = .0191097 AU   T_jup = 5.704  [ 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 18.1 mag n/a PDS3 (MPC 17271)   diameter diameter 0.42 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130   geometric albedo albedo 0.52   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130   SMASSII spectral type spec_B O   n/a Binzel et al. (2004) Icarus 170, 259-294   4034 Vishnu           Discovered 1986 Aug. 2 by E. F. Helin at Palomar. Vishnu is the Hindu god of preservation. Name suggested by J. Meeus. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20110715/MPCPages.arc Last Updated: 2011-07-20 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-24 03:07 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin