+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17561 (1994 AE11) Classification: Main-belt Asteroid          SPK-ID: 2017561 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1495541919520137 5.1782e-08   a 2.481057116416239 8.3815e-09 au q 2.110004624183815 1.2737e-07 au i 4.732151565451893 5.1944e-06 deg node 77.66162843451603 4.5742e-05 deg peri 348.5730591662218 4.9257e-05 deg M 55.31341924372947 1.4736e-05 deg tp 2459177.178314356467 (2020-Nov-23.67831436) 5.8759e-05 TDB period 1427.4258925084 3.91 7.2332e-06 1.98e-08 d yr n .2522022347285405 1.278e-09 deg/d Q 2.852109608648663 9.635e-09 au   Orbit Determination Parameters    # obs. used (total)      1334      data-arc span      25631 days (70.17 yr)      first obs. used      1951-02-04      last obs. used      2021-04-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4974      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:52:12   Additional Information  Earth MOID = 1.12378 au   Jupiter MOID = 2.43705 au   T_jup = 3.458  [ 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 14.99   n/a MPCxxxxx   diameter diameter 5.778 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.076   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17561 (1994 AE11)          Discovered 1994-Jan-08 by Spacewatch at Kitt Peak Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1994 AE11 = 1977 XD1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-02 10:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin