+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16986 Archivestef (1999 AR34) Classification: Main-belt Asteroid          SPK-ID: 2016986 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1575744448741416 4.0827e-08   a 2.303177335676374 5.6437e-09 au q 1.940255445560465 9.4113e-08 au i 2.208344718756393 4.2827e-06 deg node 169.004433720153 7.324e-05 deg peri 24.63581533527153 7.4043e-05 deg M 55.63233408630746 1.1106e-05 deg tp 2459003.205819680844 (2020-Jun-02.70581968) 3.9331e-05 TDB period 1276.7018691811 3.50 4.6927e-06 1.285e-08 d yr n .2819765590465616 1.0364e-09 deg/d Q 2.666099225792283 6.533e-09 au   Orbit Determination Parameters    # obs. used (total)      2151      data-arc span      15469 days (42.35 yr)      first obs. used      1978-03-11      last obs. used      2020-07-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4849      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:50:23   Additional Information  Earth MOID = .939173 au   Jupiter MOID = 2.28768 au   T_jup = 3.572  [ 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 14.43   n/a E2021B10   diameter diameter 3.816 km 0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 2.5476 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2020) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.253   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   16986 Archivestef           Discovered 1999 Jan. 15 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Stephanie McLaughlin (b. 1961) has worked at the University of Maryland both for the Small Bodies Node of the Planetary Data System and for the Deep Impact project, contributing to ground testing of scientific instruments and preparation of the complete scientific archive. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050721/MPCPages.arc Last Updated: 2005-07-21 [ show close-approach data ] Alternate Designations  1999 AR34 = 1978 EG = 1992 CL8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 09:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin