+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3512 Eriepa (1984 AC1) Classification: Main-belt Asteroid          SPK-ID: 2003512 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2470056464731033 3.7594e-08   a 2.248866887123728 7.7866e-09 au q 1.693384067837777 8.5577e-08 au i 7.496765675713005 3.3504e-06 deg node 112.773889661735 3.5368e-05 deg peri 301.0485284165334 3.6138e-05 deg M 326.6250235231424 1.0665e-05 deg tp 2459114.699057367153 (2020-Sep-22.19905737) 3.6901e-05 TDB period 1231.810925190681 3.37 6.3977e-06 1.752e-08 d yr n .2922526441663706 1.5179e-09 deg/d Q 2.80434970640968 9.71e-09 au   Orbit Determination Parameters    # obs. used (total)      1734      data-arc span      14962 days (40.96 yr)      first obs. used      1979-08-14      last obs. used      2020-07-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4781      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 23:04:20   Additional Information  Earth MOID = .719656 au   Jupiter MOID = 2.58094 au   T_jup = 3.577  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.9   n/a MPO448948   diameter diameter 4.880 km 0.889 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   rotation period rot_per 6.784 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Ditteon, R.; Hirsch, B.; Kirkpatrick, E.; Kramb, S.; et al. (2004) Minor Planet Bull. 31, 54-56.] [Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html] [Szabo, R.; Pal, A.; Sarneczky, K.; Szabo, Gy.M.; et al. (2016) Astron. Astrophys. 596, A40.] geometric albedo albedo 0.136   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   3512 Eriepa (1984 AC1)          Discovered 1984-Jan-08 by Wagner, J. at Flagstaff (AM) Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-25 07:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin