+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   2420 Ciurlionis (1975 TN) Classification: Main-belt Asteroid          SPK-ID: 2002420 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256880 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1336689 n/a   a 2.5611582 n/a AU q 2.2188110 n/a AU i 14.61069 n/a deg node 205.68778 n/a deg peri 198.33134 n/a deg M 30.80813 n/a deg tp 2456272.3803082 (2012-Dec-10.88030820) n/a JED period 1497.1077127 4.10 n/a n/a d yr n 0.24046366 n/a deg/d Q 2.9035054 n/a AU   Orbit Determination Parameters    # obs. used (total)      825      first obs. used      1975-??-??      last obs. used      2013-03-03      # oppositions      20      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.377  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.2 mag n/a PDS3 (MPC 17265)   rotation period rot_per 12.84 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Durkee, R.I.; Syring, C.W. (2013) Minor Planet Bul. 40, 88.] 2420 Ciurlionis (1975 TN)          Discovered 1975-Oct-03 by Chernykh, N. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1975 TN = 1979 QF  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 09:35 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin