+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70699 (1999 US27) Classification: Main-belt Asteroid          SPK-ID: 2070699 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1170354655270072 4.2453e-08   a 2.388756510841526 9.4355e-09 au q 2.109187280564519 1.0195e-07 au i 2.116802015286812 4.5236e-06 deg node 207.8280071342202 9.1263e-05 deg peri 1.367228864370573 9.2721e-05 deg M 55.00675132772367 1.559e-05 deg tp 2458994.451361942440 (2020-May-24.95136194) 5.8655e-05 TDB period 1348.516462257167 3.69 7.9899e-06 2.188e-08 d yr n .2669600335448827 1.5817e-09 deg/d Q 2.668325741118533 1.054e-08 au   Orbit Determination Parameters    # obs. used (total)      1056      data-arc span      9591 days (26.26 yr)      first obs. used      1994-03-04      last obs. used      2020-06-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52155      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 23:36:35   Additional Information  Earth MOID = 1.103 au   Jupiter MOID = 2.29267 au   T_jup = 3.523  [ 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 15.7   n/a MPO502590   diameter diameter 4.415 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.057   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70699 (1999 US27)          Discovered 1999-Oct-30 by Spacewatch at Kitt Peak Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 US27 = 1998 HK97  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-05 13:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin