+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1717 Arlon (1954 AC) Classification: Main-belt Asteroid          SPK-ID: 2001717 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1290531677018286 4.5846e-08   a 2.195642345792772 6.6208e-09 AU q 1.912287745927941 1.0183e-07 AU i 6.188949404655807 5.8695e-06 deg node 340.5116265570387 4.9001e-05 deg peri 115.8525101485189 5.7112e-05 deg M 99.48826900573896 2.5908e-05 deg tp 2456072.094669355100 (2012-May-24.59466936) 8.5456e-05 JED period 1188.340295933222 3.25 5.375e-06 1.472e-08 d yr n .3029435265571689 1.3703e-09 deg/d Q 2.478996945657604 7.4752e-09 AU   Orbit Determination Parameters    # obs. used (total)      1330      data-arc span      30072 days (82.33 yr)      first obs. used      1930-12-20      last obs. used      2013-04-20      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .46657      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:46:55   Additional Information  Earth MOID = .937835 AU   T_jup = 3.651  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.9 mag n/a PDS3 (MPC 17263)   rotation period rot_per 5.1484 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm] [Cooney, W.; Gross, J.; Terrell, D.; Stephens, R.; Pravec, P.; et al. (2005) CBET 369.] [Cooney, W.; Gross, J.; Terrell, D.; Pravec, P.; Kusnirak, P.; et al. (2006) CBET 504.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Brinsfield, J.W. (2009) Minor Planet Bul. 36, 64-66.] [Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm] [Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm] [Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm] Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979) 1717 Arlon (1954 AC)          Discovered 1954-Jan-08 by Arend, S. at Uccle (012) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1954 AC = 1930 YU = 1941 BJ = 1946 UB = 1951 GQ = 1954 CE = 1977 FQ3 = 1978 PC5 = A915 CC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 21:05 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin