+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18181 (2000 QD34) Classification: Mars-crossing Asteroid          SPK-ID: 2018181 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2956980770049078 1.8106e-08   a 2.339779501778201 6.7329e-09 au q 1.647911202486886 4.373e-08 au i 21.187831961873 6.5295e-07 deg node 330.4031883977675 1.8734e-06 deg peri 251.9386303911181 1.9196e-06 deg M 312.6497479370983 3.5923e-06 deg tp 2459372.441463600909 (2021-Jun-06.94146360) 1.3571e-05 TDB period 1307.256544571262 3.58 5.6426e-06 1.545e-08 d yr n .2753858846566865 1.1887e-09 deg/d Q 3.031647801069516 8.7239e-09 au   Orbit Determination Parameters    # obs. used (total)      2068      data-arc span      15717 days (43.03 yr)      first obs. used      1978-03-05      last obs. used      2021-03-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .41024      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:24:46   Additional Information  Earth MOID = .764644 au   Jupiter MOID = 2.31197 au   T_jup = 3.418  [ 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 13.29   n/a E2021B10   diameter diameter 4.558 km 0.708 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   rotation period rot_per 5.180 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2010) Minor Planet Bull. 37, 112-118.] geometric albedo albedo 0.426   0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   18181 (2000 QD34)          Discovered 2000-Aug-26 by LINEAR at Socorro Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  2000 QD34 = 1978 EC7 = 1993 QV5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-19 10:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin