+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3634 Iwan (1980 FV) Classification: Main-belt Asteroid          SPK-ID: 2003634 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09092559225306343 3.1387e-08   a 2.2455373184463 6.0368e-09 au q 2.041360507840214 6.9998e-08 au i 4.302653830498977 3.8982e-06 deg node 341.6038507854948 3.9837e-05 deg peri 321.1207982572828 4.51e-05 deg M 221.2529989082997 2.2252e-05 deg tp 2459474.196249842505 (2021-Sep-16.69624984) 7.6406e-05 TDB period 1229.076294273166 3.37 4.9562e-06 1.357e-08 d yr n .2929028911202717 1.1811e-09 deg/d Q 2.449714129052386 6.5856e-09 au   Orbit Determination Parameters    # obs. used (total)      2611      data-arc span      23986 days (65.67 yr)      first obs. used      1954-08-27      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46122      source      ORB      producer      Otto Matic      solution date      2020-May-20 01:56:43   Additional Information  Earth MOID = 1.0283 au   Jupiter MOID = 2.71787 au   T_jup = 3.622  [ 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 13.7   n/a MPO358664   rotation period rot_per 4.72 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Donchev, Z.; Vchkova Bebekovska, E.; Kostov, A.; Apostolovaska, G. (2018) AriXiv 1806.02880v1] 3634 Iwan (1980 FV)          Discovered 1980-Mar-16 by Lagerkvist, C.-I. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1980 FV = 1967 JK = 1977 LL = 1980 DZ4 = 1985 XU  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-17 19:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin